basics of survey2

7/28/2019 Basics of Survey2

1/15

1

# BASICS OF SURVEY #By Nirav Bhinde


2/15

2

Knowledge about Latitude & Longitude, in both DMS & Decimal formats

Knowledge about North

Study the given topology first

Command on MapInfo and Pathloss tool

GPS AMSL calibration from nearest Railway station

Check the durability of Camera, Binocular and Net-Monitor

Make sure that you use the same maps, datums andco-ordinate systems through-out the project

BEFORE ATTENDI NG THE SI TE, YOU SH OULD BE FAMI LI AR WI TH :

# EXERSICE #


3/15

3

# FREQUENCY #

Radio Frequency (RF) = 900 MHz or 1800 MHz spectrumMicrowave Frequency (Txn) = 2 GHz to 58 GHz spectrum

In Case of Hop Length > 12 km, consider 7 GHz for Transmission

In case of Hop Length from 2 to 12 km, consider 15 GHz for Transmission

In case of Hop Length < 2 km, consider 18 GHz for TransmissionRF (MHz) spreads in Area

Txn (GHz) shoots point to point (like Air-Balloon)

In both cases, as Freq. more covered Distance less

Airtel (1800 MHz), Vodafone (900 MHz), !dea (900 MHz) for RF

Airtel (Nokia), Vodafone (Nokia), !dea (Ericsson) for Txn


4/15

4

# LoS #

LoS = Line of SightLoS is not equal to Laser Sight

LoS = Laser Sight + Fresnal Zone considerations

R

d1

d2

R = 17.3 (d1.d2 / f.D) 1/2

Where,

R = Radius of Fresnal zone in meter

D = (d1 + d2) in km

f = frequency in GHz


5/15

5

# Earth Radius Factor K #

K = 1.33 for standard atmosphere with normally refracted path (this valueshould be used whenever local value is not provided)

LoS must be calculated by considering F1 at 100% and F2 at 60%

F1 = First Fresnal Zone

F2 = Second Fresnal Zone


6/15

6

# Must Check for Acquisition #

Acquisition is a Major concern for any operator We have to make trade-off between the options where they can serve most

& where it can be Acquirable !

First preference should go for the sharing options

In case of Own options Try to get the land within the TownIn case of well organized village, try to get RTT or RTP options instead of

GBT options

In case of Sharing option: always check for the BTS type


7/15

7

# Must Check for LoS #

LoS can either be Clear or Not-clear Always be very sure before you clear any LoS

Consider the vegetation growth factor as per local environment

Microwave hops over or in the vicinity of the large water surfaces and flatland areas can cause severe multipath fading. So, these kind of commentsshould be forwarded to Survey Coordinators

Always check for the space availability for the MW Radio atthe height where you propose at given Direction

Never plan MW at top of the tower, always take 2m guard

space for mounting mechanismCheck LoS from the options you choose


8/15

8kso001.pl3

Date 15-10-108

ADA Cellworks

AJARPURALatitu d e 0 2 2 3 8 1 9 .7 NLo ng itu de 0 72 5 9 0 4 .2 EAzimu th 9 6 .9 2 d egElev atio n 1 2 0 m ASLAntenn a CL 30 .0 m AGL

KSO001Latitu d e 0 2 2 3 8 0 8 .2 NLo ng itu de 0 73 0 0 4 6 .1 EAzimu th 2 7 6 .9 3 d egElev atio n 9 0 m ASLAntenn a CL 32 .0 m AGL

Frequ ency = 1 5 00 0 .0 M HzK = 1 .33

F n = 1 . 0 0 , 0 . 6 0

Path Length (2.93 km)0 0 .2 0 .4 0 .6 0 .8 1 .0 1 .2 1 .4 1 .6 1 .8 2 .0 2 .2 2 .4 2 .6 2 .8

E l e v a t i o n

( m e t e r s

)

8 0

9 0

1 0 0

1 1 0

1 2 0

1 3 0

1 4 0

1 5 0

1 6 0


9/15

9

# Must Check for Blocked LoS #

If any LoS get Block then also Route Survey must be Done for the sameMake Pathloss file for the Reason of BLOCK

The Reason of BLOCK should also get reflected in SARF as well

Never plan MW at top of the tower, always take 2m guardspace for mounting mechanism

In case of MW Repeater proposal, Choose any appropriate Town whichcan be converted to a Full Fledge site afterwards as per Networkrequirements

If you know from the early study of the Town that LoS will get

problematic, Do or Ask for the Top map Study first !


10/15

10chikhl~1.pl3

Date 15-10-108

ADA Cellworks

CHIKHLILatitu d e 0 2 1 1 4 5 5 .0 NLo ng itu de 0 73 4 9 0 4 .0 EAzimu th 2 0 9 .8 7 d egElev atio n 1 2 3 m ASLAntenn a CL 40 .0 m AGL

UCH001Latitu d e 0 2 1 1 0 1 4 .0 NLo ng itu de 0 73 4 6 1 2 .0 EAzimu th 2 9 .8 5 d egElev atio n 1 2 6 m ASLAntenn a CL 40 .0 m AGL

Frequ ency = 1 5 00 0 .0 M HzK = 1 .33

F n = 1 . 0 0 , 0 . 6 0

Path Length (10.00 km)0 1 2 3 4 5 6 7 8 9

E l e v a t i o n

( m e t e r s

)

1 1 0

1 2 0

1 3 0

1 4 0

1 5 0

1 6 0

1 7 0

1 8 0


11/15

11

# Must Check for RF #

Before visiting the New Site, you should be known with neighboring sitessectors height and azimuth

Decide RF antenna height and tilt as per operator guidelines

If any major variation found from the Nominal Lat-Long provided, Informthe coordinator for the same before starting of the survey

Take about 20 to 25 Important Landmarks of the Town with Rx level

Landmarks should be a combination of Villages and Surrounding areasdetails

In case of good Outdoor coverage in some town,

kindly check the Indoor coverage as well


12/15

12

# Must Check for SARF #

Be clear first what Operator wants in SARFAll Fonts & Size of the characters must be as per asked

Details in the SARF are the Primary details

Pathloss, MapInfo details must be same as per in SARF

Any type of Information related to the site, mention them in to the SARFCorrect AMSL of the options must be there in SARF

SARF form contain three sheets: SARF, Town Layout & Site Layout

Always mention NORTH in Town Layout & Site Layout sheets


13/15

13

Unwanted cell boundary

uncontrolled, stronginterferences

# Site Location #

Site Location in Hilly region In case of Site Location at High point, Its good for Transmission but not for

RF purpose


14/15

14

Wanted cell boundary

Site Location in Hilly region In case of Site Location at Low point, Its good for RF but not for

Transmission purpose

# Site Location #


15/15

15

# THANK YOU #By Nirav Bhinde

basics of survey2

Documents