NRSC-SDR&ISA-JODHPUR G/S-ANTENNA

REQUEST FOR PROPOSAL

Design, Fabrication, Testing, Supply and Installation of

3 Axis 7.5m. Dia X/S - Band Antenna System at RRSC Jodhpur.

April 2016

Satellite Data Reception & Ingest Systems Area National Remote Sensing CentreIndian space Research Organization

Department of Space, Government of India,Balanagar, Hyderabad 500 037

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I. INTRODUCTION:

National Remote Sensing Centre (NRSC) is planning to establish a 3 axis X/S-

band remote sensing data reception station at RRSC Jodhpur. The X/S-band data

Reception Antenna shall have the capability to track and receive data in both RHCP

& LHCP polarizations in X and S band. The X/S Data Reception Antenna shall have

the capability to track the Low Earth Orbit (LEO) satellites in the polar sun

synchronous orbit in the range of 400 KM to 1000 KM. The Antenna system should

be installed and interfaced with the ground station control room systems. X/S band

Remote sensing Reception Antenna consists of 7.5m dia reflector, 3 axis tracking

pedestal & RF Feed system. The Antenna system shall have a G/T of 32 dB/deg K in

X-band and 17 dB/deg K in S-band at 5 deg EL. The antenna main reflector diameter

is 7.5 meter to meet the G/T requirements. The Antenna Feed system shall be

capable of receiving dual circular polarized signals simultaneously in S & X bands.

The operating frequency range is 7.9 – 8.5 GHz for X band and 2.2 to 2.3 GHz for S

band data reception. All Reception parameters should meet the specifications over

the operating frequency range. S band feed systems shall have S band transmission

facility also.

The Antenna system (Cassegrain geometry) shall be mounted on a three axis

tracking mount (elevation over azimuth over train) to position the antenna anywhere

in the full hemispherical coverage without any key hole. The system should track the

satellite in X band auto track mode or S band auto track mode using single channel

mono-pulse technique with S-Band auto track and program tracking as backup

modes. As the beam width in X band is very narrow, in the order of 0.3 deg, the

mechanical and RF Feed system design should be taken care to achieve the desired

pointing and tracking accuracies. The Antenna system shall be designed to withstand

heavy winds, earth quakes, vibrations etc. Tracking in X band where half power

beam width is approximately 0.3 deg is very critical. Tracking accuracy in the order of

0.05 deg is required for successful acquisition and tracking of remote sensing

satellites. Single channel mono-pulse tracking shall be adopted for efficient tracking.

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II. SCOPE OF WORK:

Design, Fabrication, drive testing, supply and installation of the 7.5m dia Antenna system with 3 axes mount viz; Azimuth, Elevation and programmable Train axes, which include the following.

A. To design and analyze all the structural & mechanical members of entire antenna system for strength and manufacturing considering Wind loads, Inertial loads, Frictional loads and Antenna unbalance loads as per the Specifications in table at III.

B. Design of suitable 3 axis Antenna tracking pedestal by the vendor to meet the technical specifications given in table at III by designing/selecting suitable Gearboxes, bearings and couplings for connection of servo motors.

C. Design of 3 axis Antenna tracking pedestal shall include the provision for mounting of Encoder package, Limit switch assembly package in El , AZ and Train housings (Encoder & Limit switch assembly packages will be provided by NRSC as per the Interface details provided by the vendor).

D. Preparation of 2D dimensional fabrication drawings of all the components and sub assemblies and final assembly of Antenna & S/X Feed system as per the design details (RF profile details) given by NRSC.

E. To provide required inputs for selection of servo drive motors by NRSC.

F. The 7.5m dia Antenna Reflector & sub reflector shall be manufactured as per the “profile coordinate” details given by NRSC. Versilok glue (Lord 406/19 adhesive system) glue shall be used for gluing application on the reflector panels.

G. Manufacturing of antenna system shall be carried out by the vendor using the Reflector panel Die designed & developed by NRSC suitable for the “NRSC Antenna profile of the Main Reflector” (Reflector panel Die and its accessories will be supplied by NRSC and it is the responsibility of the Vendor to return these items back to NRSC after duly completion of the activity).

H. Preliminary design review (PDR) to be conducted by the vendor within 3 months of the P.O date on the structural design, manufacturing and testing. A

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PDR review committee constituted by NRSC will review and validate the design.

I. S/X Composite Feed Fabrication and waveguide components as per the design details given by NRSC.

J. Feed primary pattern measurements will be carried at a recognized “Compact Antenna Test Facility (CATF)”.

K. Integration and testing of the 7.5m. Antenna system, Tracking pedestal and X/S Band dual polarization feed system on a suitable antenna pedestal / Raiser during factory acceptance test (including drive testing) at vendor’s site.

L. Delivery of the Factory tested and accepted Antenna system and Installation & Commissioning of the 7.5m Antenna system at RRSC Jodhpur Rajasthan.

III. SPECIFICATIONS OF 7.5m Dia ANTENNA & TRACKING PEDESTAL

SL NO PARAMETERS SPECIFICATIONS

1.

Antenna Type 3 axis, Fully steerable with EL over AZ over Train Mount

Configuration Dual Reflector, Dual Shaped , Cassegrain for S & X band frequencies

Main Reflector & Surface accuracyShaped Parabola with 7.5 meter diameter & Less than/equal to 0.30 mm RMS in assembled & operational condition

Sub reflector & Surface accuracy Shaped diameter (736mm Hyperboloid) & with less than 0.05 mm RMS

2.

F/D 0.41

Focal length 3.077 meters

Frequency Range

X-Band Receive 7.8 to 8.5 GHz

S-Band Rx 2.2 to 2.3 GHz

S-Band Tx 2.025 to 2.120 GHz

3.

Feed Polarization

X- band Data Reception (Rx) : RHCP & LHCP simultaneousTrack Rx RHCP & LHCP selectable

S-band Data Rx RHCP & LHCP simultaneous Track Rx RHCP & LHCP selectable

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4.

On Axis Axial Ratio/Cross polarization

X band ≤ 1.0 dB

S band ≤ 1.5 dB

5.

G/T dB/deg K

X band at 8.0 GHz 32.0 or better at 5 deg EL, clear sky

S band at 2.2 GHz 17.0 or better at 5 deg EL, clear sky

6. S & X band Tracking mechanism Single Channel Monopulse

7. Pointing Accuracy Less than 0.08 deg

8. Tracking Accuracy Less than 0.05 deg

9. Position Resolution 0.001 deg

10. Train axis tilt Minimum of 7 degrees & Programmable as per the trajectory

11. Drive configuration Two motor Counter-torque in Azimuth, Elevation & Train axes

12.Maximum Tracking Velocity AZ : 150/sec

EL : 60/secTrain: 60/sec

13.Maximum Tracking Acceleration AZ : 6 deg/sec²

EL : 3 deg/sec² Train: 3 deg/sec2

14.Antenna Coverage

AZ: ± 360o; EL : -2o to +182o,Train : 0 to +1800 in CW 0 to -1800 in CCW

15.Gear box Design and Interface to Motor Planetary Gear box, with Torque limiting coupling

16. Antenna Stow lock Mechanism Should lock all the 3 axes.

17. Antenna Mechanical stopper Shall stop the Antenna movement in EL @ -5deg

18.Loads to be considered for Antenna design

Wind load, Inertial load, Frictional load and unbalance load etc

19.

Wind SpeedOperationalOccasional gustingDrive to StowSurvival

60 KMPH80 KMPH100 KMPH200 KMPH (Antenna in Zenith)

20. Natural Frequency of Antenna > 6 Hz

21. Operating temperature -10 to +550 C

22. Storage temperature -10 to +650 C

NOTE: Train axis positioning happens only during pre pass positioning and it is fixed during real time.

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IV. RESPONSIBILITY OF NRSC AND VENDOR:

Task Responsibility Remark & Time line

3 Axis Antenna Tracking Pedestal (AZ, EL & Train)

Design, Fabrication, sub system assembly and testing. Vendor

Total responsibility of the Vendor to meet all the Technical specifications and quality control.

Fabrication, Inspection & Acceptance of Antenna Mechanical elements.

Vendor

NRSC will involve in all individual elements/sub-systems Fabrication, Inspection, testing & integrated assembly of the Antenna Mechanical system.

Proof assembly & drive testing at vendor site.

Factory Acceptance TestVendor

NRSC will involve in the integrated tests of the Antenna Mechanical system. After FAT acceptance Antenna will be transported to Jodhpur site.

Structural Inputs for Antenna building construction are to be given to NRSC

Vendor

NRSC will undertake the civil construction at site. Structural inputs to be provided before the PDR. Antenna Template is to be provided by the Vendor.

Antenna & S/X band Feed Fabrication

Main & Sub reflector profile &

X/S band Tracking Feed design NRSC

RF design drawings will be provided to the Party Immediately after P.O is released

Design and Preparation of detailed Fabrication & Assembly Drawings of Antenna reflector structure & S/X band feed (based on the NRSC Antenna profile and Feed Design/drawings)

Vendor

Fabrication & Assembly Drawings to be approved by NRSC before launching for fabrication.

Reflector Panel Stretch forming die & Tools NRSC NRSC shall provide the Die and

Pressing tools after P.O is released.

S & X band feed electronics design & development NRSC Mechanical assembly, integration in the

feed CAN by the Vendor.

S/X band feed pattern testing Vendor

Measurements at compact Antenna Test facility (CATF) in the presence of NRSC engineers.

NOTE: Any inclusion/change in fabrication of FEED there of shall be taken up by the vendor.

Feed with tracking electronics NRSC/Vendor Testing at recognized CATF facility

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testing & tuning

Quality Control Vendor NRSC will involve in the inspection & QC at various fabrication stages.

Transportation of the Antenna system to Jodhpur. Vendor After FAT and acceptance by NRSC.

Installation & Commissioning of the Antenna system at Jodhpur site.

Vendor NRSC will supervise/guide the Vendor in Installation & Commissioning

On Site Acceptance Test (SAT) Vendor/NRSC On Site Acceptance Test (SAT) will be carried based on the SAT document.

V. DESCRIPTION OF PROPOSED SYSTEM:

The Antenna & mechanical system is a Reflector mounted on Elevation over Azimuth over

Train mount (3 axis Tracking Pedestal) which can scan the entire sky from 2° below

horizon. It is Casegrain type Antenna system. The mechanical system consists of a

7.5m diameter Aluminum Reflector supporting the Feed and Hyperbolic Sub-Reflector

through a Quadripod, an Antenna mounting frame attaching the Reflector to a pair of

Yoke arms with Counter weight arms, an Elevation housing containing the necessary drive

system for movement about an Elevation axis between 2° below the horizon to zenith

and Azimuth housing containing the drives to achieve ± 360° rotation about the Azimuth

axis. Train axis will come below the azimuth housing which will facilitate to have a

programmable tilt of ± 7 deg tilt. All the 3 axes will have dual drive mechanism to eliminate the

gear backlash in the drive mechanism. The Antenna system can be broadly divided into three

categories, namely

3 axis Tracking pedestal sub system

Reflector sub assembly

Feed system sub assembly

1. 3 AXIS TRACKING PEDESTAL SUB ASSEMBLY

The tracking pedestal sub assembly consists of the following major parts, namely

Train axis housing, Azimuth housing, Elevation housing, Yoke fixing plates, Yoke

arms, Counter weights, Antenna mounting frame and stow lock mounting brackets.

A suitable leveling mechanism below AZ Housing to be provided for maintaining all

the above parallel to ground.

Train Axis:

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The Train axis (housing) comes below the AZ housing. The Train axis housing

consists of a fabricated stiffened cylindrical steel drum with a base ring and lugs at the

bottom for supporting on a concrete pedestal at the site. The Train axis drive

mechanism consisting of 2 Nos. of gear boxes, servo motors with couplings is housed

inside it. The Train axis Slew ring bearing is supported at the bottom of the Azimuth

housing which is properly machined to match the Slewing ring bearing surface and

attached to it using high strength bolts. This housing has an access door on north

direction and is provided with three rows of support rungs on its periphery.

Azimuth Housing:

The Azimuth drive mechanism consisting of 2 Nos. of gear boxes, servo motors with

couplings is housed inside it. Cut outs are provided for mounting of gear boxes, encoder

assembly and limit switch assembly on the top ring from inside. Cut outs are also given

for application of grease for Az slewing ring bearing and gear box pinion gears. An

access is provided at the centre of top plate in the housing for routing cables

through the hatch. The Azimuth Slew ring bearing is supported at the top of the

Azimuth housing which is properly machined to match the Slewing ring bearing

surface and attached to it using high strength bolts. This housing has an access door

on north direction and is provided with three rows of support rungs on its periphery. The

stow lock brackets are mounted on east and west sides of the access door for mounting of

stow lock gear motor units. The Azimuth housing is connected to Elevation housing using

high tension bolts fitted to inner ring of Azimuth Slewing ring bearing. It is provided with

two lifting hooks for handling.

Elevation housingThe Elevation housing is a structure fabricated out of steel plates. It houses the

elevation drive mechanism consisting of 2 Nos. of gear boxes coupled with servo

motors is housed inside. Cut outs are provided on end plates for mounting of gear boxes,

encoder assembly and limit switch assembly from inside, two more cut outs are also

given for application of grease for El slewing ring bearings and gear box pinion gears.

The bottom of the Elevation housing is machined to suit the movable part of the

Azimuth Slew ring bearing and is fitted to it by high tensile steel bolts. An access is

provided at the centre of two end plates in the Elevation housing for routing

cables through the hatch. The El bearings are fitted to yoke fixing plate first and are

then fitted to end plates of Elevation housing. The Yoke arms are attached to yoke

fixing plate through El Slewing ring bearings to Elevation housing. Three access

door are provided one each at the front and stern part and the third one on the

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dome of the El housing. Buffer assembly brackets are provided on east and west

directions of El housing for mounting shock absorber assemblies. It is provided with

four lifting hooks for handling.

Yoke fixing plate:Yoke fixing plate is an interface plate between the Yoke arm and El. Slewing ring

bearing. It gives a vertical axis movement. It is having two lever arms either side

that will hit the Shock absorber plunger in the event of failure of preset limits at

the limiting position of the antenna system. The Slewing bearings for Elevation axis are

fitted between the Elevation housing and the Yoke fixing plate. They are bolted directly

to the housing, while the connection on the Yoke arm side is through an

intermediate Yoke fixing plate. This is bolted to the Slewing ring bearing on one side

and to the Yoke arm on the other side. The connection to the Yoke arm is by means

of 8 nos. of M30 bolts.

Yoke Arm A steel inter connecting frame attaches the Reflector assembly Central Hub to the

Yoke arms called antenna mounting frame which is an extended octagonal ring. The

Yoke-arm is supported by the Elevation housing through Slewing ring bearing.

The Reflector assembly and Yoke arm weights are completely counter balanced

about the Elevation axis by Counter weights which are attached to the Yoke arms.

Counter Weight ArmCounter weight arms balance the weight of the reflector assembly about elevation

axis. Counter weight Arms are half closed and half open steel box sections made

of steel plates. The open box is partitioned into two halves that accommodates

individual Counter weight plates required for balancing the Antenna System. This

counter weight box is closed by an aluminum cover of 4mm thick after placement of

required number of counter weight plates during drive testing. Counter weight arms

are fitted with lifting hooks for handling.

Drive Gear box & torque couplings:

Planetary gear reducers (Gear boxes) for AZ, EL & Train axes for the gear

reductions from the motor to the output pinion of all the 3 axes are to be used for

Torque multiplication and suitable for the Antenna dynamics. Multiple stage

planetary gearing is compact and light weight with co-axial input and output shafts.

The Torque coupling between the servomotor and the gearbox is a torque-limiting

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coupling with dry friction pad with adjustable setting of the limiting torque. This

coupling is mounted on the motor shaft and a rigid flanged hub is mounted on the

gearbox input shaft.

Stow lock brackets Two Stow-lock brackets are provided on east and west sides on the periphery of the

azimuth housing for mounting the stow lock gear & drive motor assembly that lock the

rear structure of the Reflector support (at counter weight arms) and the Azimuth

housing.

Stow lock gear & drive motor sub assembly:

The stow lock gear & drive motor sub assembly is used to lock the antenna system both in

azimuth and elevation axes when antenna is not in operation or during high wind and

cyclonic conditions. For stow-locking, the Reflector is to be brought to point towards

zenith and the Elevation housing rotated till the stow-pin is in line with the recess in the

Counterweight arm. The stow-motor is then operated for the stow-pin to travel outwards

and enter the recess. The stow-lock will be electrically operated by an induction motor.

Shock absorber assembly:

Two spring Shock absorbers are provided as a physical stop for the Elevation

movement and to reduce the impact of any accidental over-travel of the Elevation

movement beyond the -2° limits. The Shock absorbers will be fitted to the wall of the

Elevation housing below the Slewing ring bearings. Each Shock absorber consists of a

housing with a stack of disc springs and a plunger projecting out. Yoke fixing plate

mounted on the Elevation Slewing ring bearings has two projecting stops that hit the

plunger at the limiting angles below -2°. The Shock absorbers are designed to absorb

the energy of the Elevation drive moving at the maximum speed of 6° / sec, thus

ensuring safety of Antenna System from damage.

Encoder package unit: This package is a free issue material (FIM). Mounting holes are to be made and

interfaced to the drive mechanism in AZ, EL & Train axes. The unit is mechanically

interfaced to the respective axes through the pinion gears to the Slew ring bearing

in Azimuth Elevation & Train, for indicating the angular positioning of antenna

system. This unit consists of the Optical Encoder with a suitable internal gear train

and gear ratio so as to maintain the speed of the encoder and antenna system

same always. The Encoder unit is fixed with Anti backlash gears to avoid the errors

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during operations of CW (clock wise) and CCW (counter clockwise) movements.

The Tracking pedestal and Encoder system is aligned and zeroed at the time of

factory testing with the Azimuth, Elevation & Train axes.

Limit switch assembly unit: This package is a free issue material (FIM). Mounting holes are to be made and

interfaced to the drive mechanism in AZ, EL & Train axes. Limit Switch Assemblies

are used in AZ, EL & Train axes drives for limiting the travel movement of Antenna

System. This Limit switch assembly unit consists of a gear train with suitable gear

ratio and a mechanism for cam movement and structure for mounting required no of

micro switches for setting the limits at specified points.

Slewing ring bearings:These are large sized bearings able to accommodate combined loads ie. Axial,

radial and tilting moment. They support a heavy but slow turning or oscillating loads.

Suitable bearings are to be selected for Az/El/Train axes based on the load

conditions.

Foundation anchor bolts:Based on the design loads and the moments at the base of the pedestal of antenna

system, vendor is required provide the size and number of anchor bolts required for

mounting the entire antenna system on the antenna concrete tower to be

constructed on the ground. Accordingly suitable anchor bolts, leveling foot

assemblies are required to designed, manufactured and supplied.

2. ANTENNA REFLECTOR SUB ASSEMBLY:

Antenna reflector assembly consists of radial panels, radial trusses, central hub, bracing

members, Z-Sections, cleat angles, web connecting cleats, sub reflector, sub reflector

mounting bracket, quadruped assembly, junction box and lightning arrestor & aviation lamp

assemblies etc.

Radial panels:The shaped parabolic Reflector is 7.5m in diameter. The Reflector surface is made of

sixteen single Radial panels. These panels are made of 1.6 mm thick aluminum sheet

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by stretch forming method and stiffened on the back form by aluminum zee sections for

all panels.

Radial trusses:Radial trusses are tubular sectional members and are fabricated out by different cross

sectional aluminum alloy rectangular/square tubes by welding using a pre fabricated

fixture. A single truss consists of top and bottom chord members joined by vertical and

diagonal chord members. Each radial truss is press fitted and welded by precisely

machined lower and upper truss pads at front end for mounting on to the central hub.

Panels are attached to the aluminum backup radial truss by five adjustable stainless

steel bolts.

Central hub:Central hub is cylindrical structure made of aluminum alloy plate rolled into cylinder

by welding at the ends which is sufficiently stiffened interior circumference by gusset

stiffeners and by two plate discs at the bottom and top. On the top plate disc one

more plate ring is welded and machined for mounting the Feed sub assembly The

Central Hub supports Feed Assembly at the focus and the radial trusses on its

circumference.

Bracing members:

These are Aluminum alloy L-Extrusions cut into required lengths and are made to suit

on assembly. There are five types of bracing members namely outer, middle, inner,

torsion and quadruped support bracing members based on the purpose and place of

their usage on the structure. These bracing members keep the radial trusses in turn

the radial panels intact to maintain the structural rigidity of the dish.

Z-Section stiffeners:These are formed Z-Sections made from 1.6mm thick aluminum sheet with slitting at

the bottom web and are then rolled into required curvature by suiting on the stretch

forming die. These Z-Stiffeners form the backup structure of main reflector to maintain

the profile curvature of the Main reflector.

Cleat angles:These are L-Extrusions riveted on to each radial side of each panel. These cleat

angles are used for joining the panels through truss tabs to form a single reflector

dish on assembling all the radial panels.

Web connecting cleats:

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These are the formed L-Sections some make acute and the others make obtuse

angles. They are used for joining the ends of radial and circumferential Z-Section

stiffeners after bonding to the back form of the radial panel.

Sub reflector:The sub reflector assembly consists of a 736 mm dia hyperboloid shaped sub

reflector. Sub reflector is a single solid dish made of cast aluminum alloy and is

machined to required hyperboloid profile. Here convex surface is the required surface.

Three supporting tie brackets are provided on the other side for mounting of the sub

reflector to its mounting structure. The Sub-Reflector is attached through suitable

brackets to the Quadripod. The surface has RMS of 0.05 mm or better. The sub

reflector is supported by four sturdy aluminum alloy quadrupeds. This sub

reflector reflects the electromagnetic radiation coming from main reflector

surface on to feed.

Sub reflector mounting bracket:Sub reflector mounting bracket is a U Channel structure with four end bracket on four

corners of it for connecting it to quadruped assembly. The bracket provides the

required adjustment of the sub reflector position in all three x, y, z axes to

accomplish focusing and alignment. The sub reflector focusing and alignment is

performed once during installation and locked in that position firmly there by sub

reflector is secured and fixed at the position .The brackets connecting the

Quadruped legs at the top are connected maintaining their orthogonality.

Quadripod assembly:

The quadrupeds are rectangular Aluminum alloy section legs that support Sub-

reflector through Sub-reflector bracket at the top. The Quadruped legs are

connected to the backup truss using a mild steel bracket plate and a tie rod with a

turn buckle arrangement to provide minor adjustment if necessary in the field.

Lightning arrestor and aviation lamp:

One lightning arrestor is a 12mm dia copper rod tapper turned at its tip to receive

any lightning from sky. Aviation lamp is an electrical lamp bought out item arranged

on the antenna elevated structure to alert aviation navigating people.

3. FEED SYSTEM SUB ASSEMBLY:

X/S Band feed sub assembly mainly consists of a feed can for housing the wave guide

assembly, and a feed horn. The X/S-band dual polarized Transmit, receive Feed will be

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fabricated based on the antenna profile given by NRSC. The vendor is required to make 2D

drawings for fabrication and assembly based on the NRSC Feed design.

Feed can sub assembly:

Feed can is a cylindrical structure made of aluminum plate of suitable thickness

rolled into cylinder ends of which are joined by TIG welding. Cut outs are provided

for accessing the internal components during repair works which are closed by the

water tight covers. This feed can houses entire wave guide assembly and its related

components.

Wave guide components assembly:

This assembly consists of a number of wave guide components of different

types/bends fabricated out of aluminum alloy 6061 material with very close

tolerances.

VI. Technical details & nature of work for x and s band feed system:

1. Fabrication of microwave/RF components of the feed system; will be carried as per

the drawings prepared based on the NRSC FEED design inputs. Each component

viz., X-Band radiating elements, X-Band polarizer, X-Band Mono pulse comparators

with associated waveguides, S-Band radiating elements, S-Band MPC’s etc., should

be tested with their specifications before integration/assembly.

2. All above components specified should be integrated on feed mounting plate,

connected with phase matched cables and subjected to RF tests such as radiation

pattern, null depth, null coincidence etc., for X and S-Band at Compact Antenna Test

Facility.

3. After successful completion of primary pattern measurement the feed assembly

should be integrated with other feed components like X-Band mono scan converter,

X-Band LNAs, S-Band Mono scan converter (Phase commutation Unit), S-Band

LNAs. All these components shall be provided by NRSC, at the time of final

integration.

4. The wave guide section and Radome should be pressurized with dry air. This

assembly shall be tested for air tightness and should be free of leakage.

5. Pressurization Nozzle should be provided on elements mounting plate at appropriate

point for inlet of Dry air. Pressurization nozzle for waveguide pressurization should be

provided on W/G to Co-ax adaptor in RHC chain and LHC chain along with required

PU tube hose piping 8x6 mm dia Pr. 10 N/mm2.

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6. Fabrication drawings for Wave guide components are to be made by the vendor as

per the three dimensional (Pro-E) drawings.

7. All Wave guide components should be highly polished and silver –plated from inside.

After silver plating gold flash should be given.

8. Complete process of components fabrication, assembly and testing shall be inspected

by NRSC Engineers at different stages. NRSC shall depute their representative for

inspection/approval within 1 week. After intimation from vendor about readiness of

components/assembly. Individual components of Feed system shall be tested for their

RF performance.

9. Feed bottom Plate with Feed elements and cables, Mono-scan Converters etc., shall

be transported to Antenna Test Range for pattern measurements. A special container

has to be made for this to ensure safe transportation.

10. Proof Assembly of feed with Antenna should be checked.

11. Integration of the “Free Issue RF modules in the FEED system”.

o Mounting of S band RHCP MPC  and  S Band LHCP MPC

o Mounting of S band LNA`s and MSC on to a plate and mounting the same in

the feed.

o Mounting of X band RHCP MSC and X Band  LHCP MSC

o Fixing of X band LNA`s to X band MPC

o Fabrication of interface plate and mounting of SMA to N type connectors onto

the plate.

o Integration/Mounting of interface plate onto the rear opening of feed can.

o U clamps to be welded for routing the cables internal within the feed.

o Interface Converter panel

NOTE: The above integration at the factory shall be carried out after the pattern

measurement at Test range. Hence all the FIM will be issued at the time of FEED

integration and testing.

12. Feed primary pattern measurements are to be carried in CATF.

i. Sum and error channel patterns

ii. Null coincidence

iii. Null depth

iv. Side lobe levels

v. Beam widths etc.

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13. INSPECTION /TESTING:

NRSC Engineers shall inspect the whole fabrication process at following stages of

realization and testing for mechanical properties & chemical composition of raw

material and surface finish of all components in specific to waveguide paths.

NRSC will carry out Factory inspection of sub-systems/components for dimensional

accuracies (single features), integration of sub assemblies and inspection with

related features.

Fabrication of 7.5m dia Antenna system,

3 axis Tracking pedestal and

X/S Feed components and integrated testing.

NOTE: A. Vendor should arrange a recognized Compact Antenna Test Facility for conducting the

Feed system RF measurements.

B. Other components viz., S and X-Band Low Noise Amplifiers, S and X Mono scan converters, cables etc., shall be provided by NRSC as Free Issue Material (FIM). Vendor should arrange for mounting of these components in Feed can assembly and their inter connections and suitable brackets for anchoring of components and various cables, pressurization pipes etc., inside the Feed Can assembly after completion of the Feed system in the test range.

VII. PROGRAM CLAUSES:

VII.1. APPLICABLE DOCUMENTS

1. The “Terms of contract” shall form a part of this specification and all work and

supply of material/equipment shall be in strict conformity therewith.

2. Electrical and Mechanical characteristics of proposed Antenna system shall

comply with the (EIA standard) EIA-411-A document.

3. Unless otherwise specified herein, materials and workmanship shall conform to

the latest editions of the one or as many as applicable of the following standards

or their approved equivalents.

4. Indian standard specification for structural steel (standard quality) IS: 226

5. Indian standard for structural steel (fusion welding quality) IS: 2062

6. Indian standard specification for rolled steel Beam, channel and angle section IS:

808

7. Indian standard institutions structural engineers “Hand Book No.1”

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8. Indian standard method of testing weight, thickness and uniformity of coating of

hot dipped galvanized articles IS: 2633

9. Indian standard code of practice for use of metal arc welding for general

construction in mild steel IS: 816

10. Indian standard code of practice for Training and testing of metal arc welders IS:

817

11. Indian standard procedure code for manual metal arc welding of structural steel

IS: 823

12. Indian standard method for tensile testing of steel products IS: 1608

13. All Notes and instructions given in drawings and depot level instructions to be

issued at the time of awarding contract.

14. Any other document/standards catalog which shall help for desired specifications.

VII.2. FABRICATION AND FACTORY ACCEPTANCE TEST

The equipment shall be manufactured and constructed in the best and most

workman-like manner with materials of the test/process qualities as specified.

Fabrication of all works shall be carried out to a very high degree of precision

particularly trusses, Hub, panels, panel fixture, bearing seats, gear box seats,

bearings bolt clearance grooves & their heights, turntables diaphragms etc.

Antenna pointing error is the combined rms error of all possible pedestal errors, servo

encoder errors and RF Feed collimation errors. Hence care should be taken while

fabrication and installation of the Antenna structure/RF feed system to meet the

overall pointing error specification.

VII.3. FACTORY TESTSAssembly tests shall be carried out by the Vendor in his shop to ensure proper fitting

of parts, specified tolerances, surface R.M.S. checks, panel fixture checks etc. The

system shall be operated to demonstrate general operating characteristics of the

pedestal and detailed tests on a proper concrete foundation and properly secured on

anchor bolts. The tests to be conducted are as follows:

Brakes operation

Rated speed and counter balancing

Travel limits and shock absorber testing.

Manual operations of motor brake release and stow locks.

Lubrication of the bearings, drive gears, drive units, hand drive, brake

release, stow pin etc.

Backlash of Azimuth & Elevation drives.

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Slewing ring bearing wobbling

Orthogonality between AZ & EL housings

Feed alignment with respect to sub reflector as per drawing dimensions

Surface accuracy check of main and sub reflectors.

Satellite tracking and demonstration. Pointing accuracy and tracking accuracy

Natural frequency testing of total antenna system

VII.4. Corrosion protection for Antenna:

On cleaned surface, a prime coat shall be applied; on primed wiped clean surfaces

two coats of paints shall be applied. The colour of paint shall be of approved quality.

All the structural components shall be painted (Galvanized wherever necessary) with

one primer coat and two finish coats of paint colour as specified. All hardware shall be

cadmium plated.

VII.5. Packing & Forwarding :The equipment / goods shall be properly packed to withstand the conditions of shock

and vibration that may arise during transportation by common public carrier, rail, air or

any combination of these. Safe delivery of the goods is the responsibility of the

Vendor.

VII.6. Civil works for Antenna Pedestal:

a) Civil building construction details in terms of foundation loads, Anchor bolts and

template details are to be provided by the vendor.

b) The Antenna structure building design (civil) will be carried by NRSC taking into

consideration of civil structural inputs provided by the vendor.

c) Antenna will be placed above the Antenna building.

d) Following technical details are to be provided to NRSC during PDR stage.

1. Weight of the Total Antenna system including Azimuth, Elevation and

train axis pedestal, counter weights etc

2. Angle of movement - Horizontal

3. Angle of movement - Vertical

4. Total Static load on the Pedestal (Civil building)

5. Total dynamic load on the Pedestal

6. Antenna Load/Force/Torque details

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7. Drag Force, Lift Force, Overturning movement

8. PCD of Anchor bolts (Diagram to be enclosed)

9. Building Natural Resonance Frequency

10. Interface cabling routing duct details

11. Any other relevant inputs for civil structure planning and execution.

Note: No additional charges shall be payable to the vendor by NRSC for the above.

VII.7. Compliance Statement:

The Vendor shall submit compliance statement as per the format/table enclosed/given

below along with technical bid. The word compliance shall be used for each

specification accepted unconditionally by the Vendor. Conditional compliance shall be

mentioned with technical details in the remarks column.

VII.7.1.Applicability of conditions

All the above conditions shall apply to all the parts of these specifications.

VII.8. Overall responsibilities of the party:

i. Progress report:The vendor shall submit fortnightly progress reports to the NRSC after the PO is

issued by the NRSC. Progress reports shall indicate

The percentage completion of various phases of the work.

The progress of work during the previous fortnight.

The work proposed to be carried out during the ensuing fortnight.

Problem encountered and how the problems are proposed to be solved.

VII.9. Facility to staff of NRSC:

The NRSC shall have free access at all times to all parts of the shops and site while

the material pertaining to this specifications is being fabricated.

The NRSC/representative shall have right to inspect, witness any measurement ,

fabrication work pertaining to this specification, test, shall be supplied by the

contractor at free of cost.

All original reports pertaining to mechanical property tests viz: chemical composition

of raw materials, Tensile tests, Hardness tests, Stress relieving tests, Radiography

tests etc. And other related mechanical tests shall be furnished to the

NRSC/representative.

All inspection reports, test records/ dimensional measurement reports in original shall

be furnished to NRSC/representative.

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VII.10. List of free issue Material (Mechanical & RF modules):

Sl. No.

Item Description Qty/System Estimated Cost of the Item

Remarks

1. Stretch Forming Die 01 10.0 Lakhs

2. Profile Inspection fixture 01 0.50 Lakh

3. Panel supporting fixture 01 0.50 Lakh

4. S band MPC boards 02 No 1.0 Lakhs RHCP & LHCP

5. S band LNA 04 Nos 2.0 Lakhs --Do--

6. S Band  MSC 02 nos 1.0 Lakhs --DO--

7. X Band LNA 04 Nos 14.0 Lakhs --Do --

8. X band MSC 02 No 3.0 Lakhs -- DO --

9. SMA to N type connectors & cables

01 Lot 1.0 Lakhs

10. TOTAL 33.0 Lakhs / SystemNOTE: i) Free Issue material (FIM) shall be issued only on submission of Bank Guarantee

for the items given above. The BG shall be valid up to the total delivery period + 2 months.

ii) FIM will be issued within 3 months from the release of Purchase order.

VIII. TECHNICAL TERMS & CONDITIONS

1) The prospective vendors should submit full details of their technical competence

for undertaking project of this nature, in the technical part of their proposal

document. Following details as given below (not limited to) are to be enclosed

along with their bid.

2) The following details are required for qualifying the Vendor. Documentary

evidence to be attached by the vendor.

Table- 6: Vendor details

S.NO Description Details1. Year of Establishment

2. Vendor’s Area Of Core Competence. (copy of PO’s may be provided)

3. Infrastructure details (Area, facilities, manpower etc.,)

4. Annual turnover in the last two financial years

5. Vendor should necessarily have the experience in establishing at least one remote sensing data reception full motion Antenna system in the past 10 years. (copy of PO along wih completion certificate to be provided)

6. Details of the similar orders executed along with end user address to be provided.

7. Quality Management system (QMS) certification or similar certifications

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8. Willingness to provide Non-Disclosure Agreement, Confidential agreement on NRSC shared information. (A letter shall be enclosed.)

3) The overall responsibility of installation of the system lies with vendor.

4) Vendor should have experience in establishing & commissioning of S&X band

full motion remote sensing Antenna systems for LEO satellites.

5) Following results analysis to be provided by the vendor during Preliminary

design review.

Pointing and tracking analysis with specified wind loads

G/T analysis for data and tracking chains in S & X band

Thermal & Structural analysis for X band G/T performance

6) A copy of the project execution document along with proposed configuration has

to be submitted to NRSC within one month from the Date of placement of Order.

7) Technical proposal should include schedules for PDR, FAT, OSAT, and

Installation plan and any other important events.

8) Vendor has to supply all the required documentation at least two weeks before

all the scheduled reviews/events like PDR, FAT, OSAT, Installation etc.

9) Design review (PDR) shall be conducted within 3 months of the P.O release.

10) Test results of all the sub systems to be provided at the time of delivery.

11) Vendor has to Supply the following Antenna design documents along with the

system.

(a) load calculations, maintenance, interface and fabrication drawings of all

structural & mechanical components

(b) Dimensional inspection reports of structural & mechanical components

(c) mechanical properties, chemical composition & radiography test reports

of Materials used in producing structural & mechanical components

12) The safety of working personnel during the Installation & commissioning of the

Antenna system shall be the full responsibility of the vendor.

13) Training shall be given by the vendor to the team of 5 people (minimum)

identified by NRSC at the user’s site on design, testing, installation and

maintenance.

14) LIQUIDATED DAMAGES: For delayed Delivery / installation and commissioning

NRSC reserves the right to levy “liquidated damages @ 0.5% per week” subject

to a maximum of 10% of the Purchase Order value.

15) PAYMENT TERMS:

(A) FOR ITEM 1 (Design, fabrication, testing and supply of Antenna sysem):

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(a) Maximum of 30% of the total value, if required can be provided as

advance against submission of bank guarantee for an equivalent amount

valid for the complete period of supply and installation. (Approx. 16

months).

(b) 60% of the total value shall be released against satisfactory completion of

FAT at vendor’s site and receipt of entire Antenna system at our site at

Jodhpur, INDIA by NRSC.

(c) Balance 10% of the total value after satisfactory completion of Installation

& commissioning along with Installation & commissioning charges as

mentioned in “B” below.

(B) FOR ITEM 2 (Installation & commissioning):

100% of the cost payable towards Installation & commissioning of the

Antenna system against satisfactory acceptance by NRSC within 30 days

and on production of equivalent BG for the total Purchase Order value

(Antenna + Installation).

16) WARRANTY:

1. Complete system shall be warranted for a period of 12 months.

2. The warranty shall start after the installation and acceptance of the

system at Site (Jodhpur).

3. The vendor is responsible for replacement/repair of the defective

components/sub assemblies during the warranty period at free of cost.

17) GENERAL INSTRUCTIONS FOR SUBMISSION OF PROPOSAL :

Pre-bid briefing: Pre-bid briefing between NRSC and the prospective vendors

will be held at NRSC Hyderabad on 26th August, 2016. During this briefing,

vendors can seek clarifications required by them to generate proposals. The

addendum/corrigendum if any, after the pre-bid briefing shall be published in

NRSC and ISRO websites and will be accessible to all the vendors. The bid

submitted by the vendors must comply with the RFP together with the

addendum/corrigendum published. NRSC strongly recommends participation by

the vendors in pre-bid briefing at their own cost. However, it is not a mandatory

requirement and vendors can participate in the tender irrespective of their

attendance in the pre bid briefing . Vendors who wish to participate should send

their willingness regarding their participation with name, position, address and

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contact details and Tender Ref No : 2016E02542 at least TEN working days in

advance before the pre-bid briefing to gp_kumar@nrsc.gov.in /

purchase@nrsc.gov.in. Foreign nationals must indicate their nationality, passport

details. A scanned copy of the valid passport along with copy of valid visa

(Business or Conference only) should be sent to Senior Purchase and Stores

officer, Purchase Unit-2, National Remote Sensing Centre, ISRO, Balanagar,

Hyderabad-500037, Telangana, India. Email: gp_kumar@nrsc.gov.in. in case of

any change in the date and venue of the pre-bid briefing, the same shall be

displayed in ISRO/NRSC website.

Interested vendors can be present at NRSC during opening of Technical bids.

Technical bids will be opened in the presence of the attending vendors or their

authorised representatives. Authorised representatives must carry a proper

identification proof and an authorisation letter. The commercial bids will be

opened in the presence of the attending vendors or their authorised

representatives on a date that will be notified individually to the vendors whose

technical bids are found to be suitable.

All valid technical bids will be evaluated for their suitability by NRSC and the

decision of NRSC shall be final for accepting / rejecting any of the bids.

The technical information and other details shared by NRSC shall remain

exclusive property of NRSC. Vendor shall make no attempt to unlawfully reveal,

misuse or encroach upon the data/information provided by NRSC.

All communications should be addressed to:

Senior Purchase & Stores officer, Purchase Unit-2 National Remote Sensing Centre, ISRO, Balanagar, HYDERABAD, Telangana, 500 037, INDIA Phone : +91 40 2388 4072.Fax : +91 40 2387 8695 E-mail : gp_kumar@nrsc.gov.in

IX. DELIVERY SCHEDULE and LIST OF DELIVERABLES:

A. Design, Fabrication, assembly, testing, FAT and supply of the 7.5m dia Antenna

system and feed system with 3 axes mount viz; Azimuth, Elevation and

programmable Train axes at the NRSC site (Jodhpur, Rajasthan) in good working

order to the full satisfaction in 12 months from the date of placement of Purchase

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Order, in every respect with all mountings, fittings, fixtures and hardware in

accordance with this RFP. However, early delivery is solicited but please note that

no preferences w.r.t evaluation of the offer shall be given for early deliveries.

B. Installation & commissioning, Site Acceptance tests shall be completed and the

Antenna system handed over for tracking purpose within two months of the

delivery at site or intimation by NRSC, whichever is later. The date for Installation

& commissioning will be communicated to the vendor.

C. After completion of the delivery and Installation of the Antenna system, the

Vendor shall return the Stretch Forming Panel DIE, Profile inspection Fixture and

Panel supporting tools etc (FIM tools) to NRSC Hyderabad in good condition.

Proper care should be taken while packing and transporting these Die/tools.

D. One set of total Antenna fabrication drawings (modified if any during assembly

and testing) have to be provided to NRSC. Also these details are to be provided in

Soft copy in a CD.

LIST OF DELIVERABLES / SYSTEM:1. Factory tested and accepted 3 axis Tracking pedestal and 7.5m Antenna

assembly.

2. X/S-band dual polarization feed system (along with FIM duly integrated with Feed

system).

3. All documentation/drawings related to design, manufacturing, process, assembly,

integration & testing along with test results.

IX. INSTALLATION & COMMISSIONING OF 7.5m ANTENNA SYSTEM AT NRSC SITE (RRSC campus in JODHPUR, Rajasthan)Following are the salient features / procedures to be followed by the vendor for the

Installation & commissioning of 7.5m Antenna system (Reflector, Train/AZ/EL mount

and RF Feed). The Antenna system is to be installed at RRSC campus in JODHPUR,

Rajasthan. Following is an indicative and tentative inputs based on our experience

(reference for vendor).

Pre requisites for installation of 7.5m Antenna System: 1. 75 ton or higher capacity with 30 m. boom length crane – 1 No

2. 10 / 12 ton capacity pick and carry type crane – 1No

3. Standard/required CRANE accessories like Metallic slings, Metallic/Webbing

slings, D-Shackles, Nylon/Manila ropes etc.

4. Fasteners as required

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5. Skilled and unskilled man power

6. Personnel protective equipments

I. Sequence of operations to be carried out for Assembly and Installation of 7.5m dia. Antenna and Tracking pedestal system:

A. Assembly of 7.5m dia. Antenna system on the ground: Leveling of Central Hub, Integration of reflector trusses on to the Hub

Fitment of feed assembly of Hub

Integration of panels on to trusses

Assembly of Quadruped and sub reflector on ground

Fitment of all bracing members to trusses

Integration of Quadruped and sub reflector assembly

A Pick and carry type crane is required for the above operations

B. Assembly of 3 axis Tracking pedestal on ground: Position and Level the Train/AZ Housing.

Integration of yoke support arms and Integration of counter weights

Mounting of interface ring on to Tracking pedestal

C. Final Installation activities on Antenna concrete Tower: Leveling of leveling foots using spirit level or inclinometer on concrete

tower and induce tilt to leveling foots if required.

Haul up Tracking pedestal assembly on to concrete tower using required

boom length along with required capacity of crane (Usually 75 ton capacity

and 30 m. boom length.)

Securing of Tracking pedestal on leveling foot with required Hex nuts.

Haul up 7.5m dia Antenna system using required boom extension

and required capacity crane on to the interface ring of Tracking pedestal.

Securing of antenna system using required Hex/Nut and bolts.

Note: 1. Installation must be carried out under the close supervision and instructions of

NRSC.

2. Antenna pointing error is the combined rms error of all possible pedestal errors,

servo encoder errors and RF Feed collimation errors. Hence care should be

taken while installing the Antenna structure/RF feed system to meet the overall

pointing error specification.

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3. Mechanical axis and RF beam axis has to be perfectly matched while integrating

FEED.

4. Following important Antenna parameters are to be measured and documented

at the time of Installation.

i. Orthogonality (90deg) between Azimuth and Elevation axes.

ii. 90 deg verticality w.r.t the local reference surface for Train/Azimuth

axis.

iii. Over all backlash in the Train, Az & El drive mechanism.

=========================== xxxx ===========================

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COMPLIANCE STATEMENT TO BE FILLED AND SUBMITTED ALONG WITH

QUOTATION

Sl.No

Parameter / Specification Compliance (Y/N)

Remarks

SCOPE OF WORK: Design, Fabrication, drive testing, supply and installation of the 7.5m dia Antenna system with 3 axes mount viz; Azimuth, Elevation and programmable Train axes.

1. To design and analyze all the structural & mechanical members of entire antenna system for strength and manufacturing considering Wind loads, Inertial loads, Frictional loads and Antenna unbalance loads as per the Specifications in table at III.

2. Design of suitable 3 axis Antenna tracking pedestal by the vendor to meet the technical specifications given in table at III by designing/selecting suitable Gearboxes, bearings and couplings for connection of servo motors.

3. Design of 3 axis Antenna tracking pedestal shall include the provision for mounting of Encoder package, Limit switch assembly package in El , AZ and Train housings (Encoder & Limit switch assembly packages will be provided by NRSC as per the Interface details provided by the vendor).

4. Preparation of 2D dimensional fabrication drawings of all the components and sub assemblies and final assembly of Antenna & S/X Feed system as per the design details (RF profile details) given by NRSC.

5. To provide required inputs for selection of servo drive motors by NRSC.

6. The 7.5m dia Antenna Reflector & sub reflector shall be manufactured as per the “profile coordinate” details given by NRSC. Versilok glue (Lord 406/19 adhesive system) glue shall be used for gluing application on the reflector panels.

7. Manufacturing of antenna system shall be carried out by the vendor using the Reflector panel Die designed & developed by NRSC suitable for the “NRSC Antenna profile of the Main Reflector” (Reflector panel Die and its accessories will be supplied by NRSC and it is the responsibility of the Vendor to return these items back to NRSC after duly completion of the activity).

8. Preliminary design review (PDR) to be conducted by the vendor within 3 months of the P.O date on the structural design, manufacturing and testing. A PDR review committee constituted by NRSC will review and validate the design.

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9. S/X Composite Feed Fabrication and waveguide components as per the design details given by NRSC.

10. Feed primary pattern measurements will be carried at a recognized “Compact Antenna Test Facility (CATF)”.

11. Integration and testing of the 7.5m. Antenna system, Tracking pedestal and X/S Band dual polarization feed system on a suitable antenna pedestal / Raiser during factory acceptance test (including drive testing) at vendor’s site.

12. Delivery of the Factory tested and accepted Antenna system and Installation & Commissioning of the 7.5m Antenna system at RRSC Jodhpur Rajasthan.

SPECIFICATIONS OF 7.5m Dia ANTENNA & TRACKING PEDESTAL

13. Antenna Type:

3 axis, Fully steerable with EL over AZ over Train Mount

14. Configuration:

Dual Reflector, Dual Shaped , Cassegrain for S & X band frequencies

15. Main Reflector & Surface accuracy:

Shaped Parabola with 7.5 meter diameter & Less than/equal to 0.30 mm RMS in assembled & operational condition

16. Sub reflector & Surface accuracy

Shaped diameter (736mm Hyperboloid) & with less than 0.05 mm RMS

17. F/D :0.41

18. Focal length :3.077 meters

19. X-Band Rx Frequency :7.8 to 8.5 GHz

20. S-Band Rx Frequency :2.2 to 2.3 GHz

S-Band Tx Frequency : 2.025 to 2.120 GHz

21. Feed polarization( X- band):

Data Reception (Rx) RHCP & LHCP simultaneousTrack Rx RHCP & LHCP selectable

22. Feed polarization(S-band):

Data Rx RHCP & LHCP simultaneous Track Rx RHCP & LHCP selectable

23. On Axis Axial Ratio/Cross polarization :

X band :≤ 1.0 dB

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24. On Axis Axial Ratio/Cross polarization :

S band : ≤ 1.5 dB

25. G/T dB/deg K:

X band at 8.0 GHz: 32.0 or better at 5 deg EL, clear sky

26. G/T dB/deg K:

S band at 2.2 GHz: 17.0 or better at 5 deg EL, clear sky

27. S & X band Tracking mechanism:

Single Channel Monopulse

28. Pointing Accuracy: Less than 0.08 deg

29. Tracking Accuracy: Less than 0.05 deg

30. Position Resolution: 0.001 deg

31. Train axis tilt:

Minimum of 7 deg Programmable as per the trajectory

32. Drive configuration:

Two motor Counter-torque in Azimuth, Elevation & Train axes

Gear box Design and Interface to Motor:

Planetary Gear box, with Torque limiting coupling

33. Antenna Stow lock Mechanism:

Should lock all the 3 axes.

34. Antenna Mechanical stopper:

Shall stop the Antenna movement in EL @ -5deg

35. Maximum Tracking Velocity :

AZ : 150/sec EL : 60/secTrain: 60/sec

36. Maximum Tracking Acceleration :

AZ : 6 deg/sec² EL : 3 deg/sec² Train: 3 deg/sec2

37. Antenna Coverage:

AZ: ± 360o;

EL : -2o to +182o,Train : 0 to +1800 in CW 0 to -1800 in CCW

38. Loads to be considered for Antenna design:

Wind load, Inertial load, frictional load and unbalance

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load etc39. Wind Speed

Operational : 60 KMPHOccasional gusting :80 KMPHDrive to Stow :100 KMPHSurvival :200 KMPH (Antenna in

Zenith)40. Natural Frequency of Antenna : > 6 Hz41. Operating temperature: -10 to +550 C42. Storage temperature: -10 to +650 C

RESPONSIBILITY OF NRSC AND VENDOR:

43. Refer to the chapter IV Page No.6&7 and provide compliance.

FABRICATION AND FACTORY ACCEPTANCE TEST

44. The equipment shall be manufactured and constructed in the best and most workman-like manner with materials of the test/process qualities as specified.

45. Fabrication of all works shall be carried out to a very high degree of precision particularly trusses, Hub, panels, panel fixture, bearing seats, gear box seats, bearings bolt clearance grooves & their heights, turntables diaphragms etc.

46. Antenna pointing error is the combined rms error of all possible pedestal errors, servo encoder errors and RF Feed collimation errors. Hence care should be taken while fabrication and installation of the Antenna structure/RF feed system to meet the overall pointing error specification.

PROGRAM CLAUSES

47. Corrosion protection for Antenna:On cleaned surface, a prime coat shall be applied; on primed wiped clean surfaces two coats of paints shall be applied. The colour of paint shall be of approved quality. All the structural components shall be painted (Galvanized wherever necessary) with one primer coat and two finish coats of paint colour as specified. All hardware shall be cadmium plated.

48. Packing & Forwarding :

The equipment / goods shall be properly packed to withstand the conditions of shock and

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vibration that may arise during transportation by common public carrier, rail, air or any combination of these. Safe delivery of the goods is the responsibility of the Vendor.

49. Civil works for Antenna Pedestal:

Civil building construction details in terms of foundation loads, Anchor bolts and template details are to be provided by the vendor at no extra cost.

50. Progress report:

The vendor shall submit fortnightly progress reports to the NRSC after the PO is issued by the NRSC.

TECHNICAL TERMS & CONDITIONS

51. The prospective vendors should submit full details of their technical competence for undertaking project of this nature, in the technical part of their proposal document.

52. Vendor Detail

Refer to Table-6 at page No.20&21

53. The overall responsibility of installation of the system lies with vendor.

54. Vendor should have experience in establishing & commissioning of S & X band full motion remote sensing Antenna systems for LEO satellites.

55. Following results analysis to be provided by the vendor during Preliminary design review.

Pointing and tracking analysis with specified wind loads

G/T analysis for data and tracking chains in S & X band

Thermal & Structural analysis for X band G/T performance.

56. A copy of the project execution document along with proposed configuration has to be submitted to NRSC within one month from the Date of placement of Order.

57. Technical proposal should include schedules for PDR, FAT, OSAT, and Installation plan and any other important events.

58. Vendor has to supply all the required documentation at least two weeks before all the scheduled reviews/events like PDR, FAT, OSAT, Installation etc.

59. Design review (PDR) shall be conducted within 31 | P a g e

3 months of the P.O release.60. Test results of all the sub systems to be

provided at the time of delivery.61. Vendor has to Supply the following Antenna

design documents along with the system. (d) load calculations, maintenance, interface

and fabrication drawings of all structural & mechanical components

(e) Dimensional inspection reports of structural & mechanical components

(f) mechanical properties, chemical composition & radiography test reports of Materials used in producing structural & mechanical components

62. The safety of working personnel during the Installation & commissioning of the Antenna system shall be the full responsibility of the vendor.

63. Training shall be given by the vendor to the team identified by NRSC at Vendor’s site as well as at the user’s site.

64. LIQUIDATED DAMAGES: For delayed Delivery NRSC reserves the right to levy “liquidated damages @ 0.5% per week” subject to a maximum of 10% of the order value.

65. PAYMENT TERMS: For item-1 (a) 30 % of the total value if required as

advance against submission of bank guaranty, after receipt of purchase order.

(b) 60% of the total value on satisfactory completion of fabrication and integration of Antenna system at vendor’s site and receipt of the same at site by NRSC.

(c) Balance 10% of total value on satisfactory completion of installation along with installation chatges as mentioned in item -2 below.

For item-2(d) 100% total value of P.O against satisfactory

acceptance by NRSC at JODHPUR and on production of equivalent performance bank guarantee the total cost.

66. WARRANTY: 12 months from the date of installation. Replacement/repair of the defective

components/sub assemblies during the warranty period at free of cost.

DELIVERY SCHEDULE & LIST OF DELIVERABLES

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67. Antenna System:12 months time from the date of placement of order

68. Installation & commissioning:Within two months time from the delivery of antenna systems at site or communication by NRSC whichever is later

69. Returning of NRSC supplied FIM Tools:Stretch forming Panel DIE, Profile inspection fixture and Panel supporting fixture etc. immediately after Factory acceptance test / installation.

70. Drawings:One set of total Antenna system (including feed) fabrication & assembly drawings. ( both hard & soft copies)

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