user readiness for goes-r grb simulator and hrit/emwin

Satellite Users Conference11 April, 2013

Non Export-Controlled Information

User Readiness for GOES-RGRB Simulator and HRIT/EMWIN

Stephen Ambrose, Marlin Perkins, Paul SeymourNOAA/NESDIS OSPO/Satellite Products and Services DivisionNCWCP College Park and NSOF Suitland

[email protected]

http://www.goes-r.gov/

mailto:[email protected]


Non Export-Controlled Information 2

GOES-R Operational System Configuration



Transitioning from GOES NOP to GOES-R

• Improved data products for hemispheric retransmission– Faster full disk images• 5 minutes (Mode 4) and 15 minutes (Mode 3)

– Full set of Level 1b data• Data from six GOES-R instruments including 16 ABI channels

• Requires new antenna, receiver hardware, and processing system to handle the new data volumes– Receiver frequency shift from 1685.7 MHz to 1686.6 MHz– Dual circular polarized signals– Going from 2.11 Mbps (GVAR) to 31 Mbps (GRB)



Transition from GVAR to GRB

GOES Variable (GVAR) GOES Rebroadcast (GRB)

Full Disk Image 30 Minutes 5 Minutes (Mode 4)15 min (Mode 3)

Other Modes Rapid Scan, Super Rapid Scan 3000 km X 5000 km (CONUS: 5 minute)1000 km X 1000 km(Mesoscale: 30 seconds)

Polarization None Dual Circular Polarized

Receiver Center Frequency 1685.7 MHz (L-Band) 1686.6 MHz (L-Band)

Data Rate 2.11 Mbps 31 Mbps

Antenna Coverage Earth Coverage to 50 Earth Coverage to 50

Data Sources Imager and Sounder ABI (16 bands), GLM, SEISS, EXIS, SUVI, MAG

Space Weather None ~2 Mbps

Lightning Data None 0.5 Mbps



GRB Downlink Characteristics

• Input Center Frequency: 1686.6 MHz• Content (specified for each of two polarization channels: LHCP, RHCP)

– L1b data, QC data and metadata: ABI, SUVI, EXIS, SEISS, MAG– L2 data, QC data, metadata: GLM– GRB Information Packets

• Data rate– 31 Mbps maximum data rate– 15.5 Mbps instantaneous maximum for each polarization channel– Downlink link margin: 2.5 db

• Compression - Lossless compression required– JPEG2000 (ABI, SUVI) and SZIP (GLM); EXIS, SEISS and MAG data will not be compressed

• Format– Outer Frame Format: DVB-S2– Inner Frame Format: CCSDS Space Packet

• Coding– BCH + LDPC (2/3) for 8-PSK and LDPC (9/10) for QPSK

• Modem Required C/No (dB-Hz): 78.6• Maximum Demodulator Required Eb/No (dB) for 1x10-10 BER:

– 3.7 dB (8 PSK); 3.9 dB (QPSK)• Minimum Antenna System G/T (dB/K) : 15.2 db/K (at 50 Elevation)



Details of the Dual Polarized Signal

• GRB – LHCP: L1b products from ABI 0.64 um band and 6 IR bands (3.9, 6.185,

7.34, 11.2, 12.3, and 13.3 um)– RHCP: L1b products from ABI bands 0.47, 0.865, 1.378, 1.61, 2.25, 6.95,

8.5, 9.6 and 10.35um, L2+ GLM, L1b SUVI, L1b EXIS, L1b SEISS, and L1b Magnetometer products

• Ensures load balanced utilization of the two circular polarizations, allowing users to receive all GRB products with a dual-polarized system (both LHCP and RHCP), and allowing users flexibility to receive GOES Imager legacy channels with a single polarized system (LHCP only).



GRB Channel Content Summary

ABI

SUVI

GLM

Other

Info Packets

• For each instrument: image data + metadata + CCSDS Space Packet overhead

• ABI has per pixel QC bits, coded separately

• ABI, SUVI, GLM compressed• GRB Info packets via CCSDS

File Delivery Protocol (CFDP)• Channel synchronization and

coding (link layer) for DVB-S2 • Error correction (LDPC)

Included in two

15.5 Mbps Bandwidth channels

ABI L1b image Data (compressed)

QC bits

MetadataSpace packet overhead

SUVI L1b image Data (compressed)


L2 Lightning Events/ Flashes/ Groups

(compressed)


L1b EXIS, MAG, SEISS science data


GRB Information Packets

CFDP OverheadSpace packet overhead

Channel Synchronization and Coding

Error Correction

Note: This is a catalog of the contents and not a sequential organization of the stream



GRB Ground Antenna Sizes

NOTES:1. Calculations based on available data as of May 20112. Each antenna size is usable within the indicated contour3. Rain attenuations included are:

1.3/1.6/2.0/2.2/2.5 dB (3.8 to 6 m)4. An operating margin of 2.5 dB is included as the dual polarization isolation is likely to vary within

each antenna size area

GOES-West GOES-East



GRB Resources and Documentation

• Product Users Guide (PUG) for GRB• GRB Downlink Specification

http://www.goes-r.gov/resources/docs.html



GRB Simulators

• Purpose– On-site testing of user ingest and data handling systems, aka GRB field terminal sites– Simulate GRB downlink functionality by generating Consultative Committee for Space

Data Systems (CCSDS) formatted GRB output data based on user-defined scenarios, test patterns, and proxy data files.

– Available this year.

• Key Capabilities and Features– Transportable

• Fully self contained• Configurable hardware units

– Outputs simulated GRB at baseband and IF levels– “Off-line Mode” to create and configure simulation scenarios

• Also, create test patterns and process input proxy data– “On-line Mode” to continuously output GRB data stream

• Includes monitoring and logging of events



GRB Simulator Concept

Network Switch

Modulator

DVBS2/CCSDSFront End Processor

GRB Simulator Processor

Time codeReader/Generator

• CCSDS packets in LHCP and RHCP streams• Lossless compression• DVBS2 framing• BCH/LDCP encoding• 8-PSK or QSPK modulation

GRB signal in Baseband and IF Frequencies

Simulated data/test patterns

Binary/PNG/JPEGProxy Data



GRB Simulator HardwareUser Terminal Connectivity

RF

IF P/P

MODEM/FEP

GigESWITCH

USER PRODUCTPROCESSING

GRB Sim

DIGITAL

IF

GOES USER TERMINAL



GRB Simulator Integrated Hardware

FRONT REAR

Patch Panel

Patch Panel




CASE 1 CASE 2

Switch

KVM Console

Server

FEP

Modem




KVM Extended



Simulator Delivery and Training Approach

• Marlin Perkins of SPSD is the POC for simulator loans.• Selection of order will be based on first come, first served, and

customer readiness to receive units.• Simulator will be shipped from the Omaha, Nebraska Harris facility.• Upon arrival, Harris will provide a trainer who will assist in

unpacking and training in use.• The borrower will have a period of time with simulator, not to

exceed 90 days.• After completion, borrower will pack and ship simulator back to

Harris in Omaha.• Harris will receive simulator, re-baseline and make available to the

next borrower.



Summary

• GRB allows real time distribution of all Level-1b GOES-R data products for direct read out users.

• Direct Readout users need to upgrade their equipment for GOES-R:– Significant increase in data rate!!!– New data format!!!

• GRB down link specifications and data format specifications have been published.

• GRB simulators will be available in 2013 for Direct Broadcast reception equipment development and testing.

• Updates to be posted on the GOES-R web site:– http://www.goes-r.gov/


Non Export-Controlled Information

User Readiness for GOES-RGRB and HRIT/EMWIN

Stephen Ambrose, Marlin Perkins, Paul SeymourNOAA/NESDIS OSPO/Satellite Products and Services DivisionNCWCP College Park and NSOF Suitland

[email protected]

http://www.goes-r.gov/

mailto:[email protected]



Transitioning HRIT/EMWIN from GOES NOP to GOES-R

• NOAA NWS Emergency Managers Weather Information Network (EMWIN) is a priority-driven weather data broadcast service broadcast – Alerts/Watches/Warnings < 1 minute– Forecasts, Graphic Format Products and Imagery– Low cost ground receive stations

• The NOAA NESDIS Low Rate Information Transmission (LRIT) is a collection of reduced resolution GOES and MTSAT imagery and products– Visible, Infrared and Water Vapor Imagery at 4 Km Spatial Resolution– Infrared MTSAT imagery on LRIT-West– Tropical Storm Information

• The GOES-R series combines the two services into a single NOAA service called HRIT/EMWIN—HRIT for High Rate Information Transmission.



Transitioning HRIT/EMWIN from GOES NOP to GOES-R

• Improved data products for hemispheric retransmission– Faster full disk images: between 15 and 30 minutes– Warnings, Watches, Tropical Storm Information– Copy of GOES Data Collection System (GOES DCS)

• Requires new antenna and receiver hardware– Receiver frequency shift to 1694.1 MHz from:• EMWIN 1692.7 MHz and LRIT 1691.0

– BPSK Polarization; EMWIN shift from Offset QPSK– Data Rate to a combined 400 Kilobits per Second from:

EMWIN: 19.2 Kbps and LRIT : 128 Kbps (combined 147.2)



Transition from LRIT and EMWIN to HRIT/EMWIN

LRIT Based on GOES NOPand EMWIN

HRIT/EMWIN

Full Disk, NH, SH images 30 Minutes for Full DiskFollows GOES East/West Schedule

Variable but planned 3 Channels of Full Disk every 15 minutes

Polarization LRIT BPSKEMWIN offset QPSK

BPSK

Receiver Center Frequency LRIT 1691.0 MHz (L-Band)EMWIN 1692.7 MHz (L-Band)

1694.1 MHz (L-Band)

Data Rate LRIT 128 KbpsEMWIN 19.2 Kbps

400 Kbps

Antenna Coverage Earth Coverage to 50 Earth Coverage to 50

Imagery Data Sources GOES NOP Imager (IR,VIS,WV) MTSAT Imager

ABI (3 or more bands)MTSAT (at least 1 band)

EMWIN Products Full Suite of Current Products Combined w/ LRIT Products

GOES DCS Copy of DCS observations Copy of observations



HRIT/EMWIN Downlink Characteristics

• Input Center Frequency: 1694.1 MHz N/S Linear N-S Polarization

• Content – Reduced spatial resolution Full Disk GRB images of planned 3 channels every 15

minutes– Alerts/Watches/Warnings and Tropical Storm Information, etc– Forecasts, Graphic Format Products and Imagery– Copy of GOES DCS

• Data rate– 927 Kbps maximum data rate with 400 Kbps content packet data rate– Predicted downlink link margin at 10 degrees or more elevation angle:

• 2.0 to 2.6 dB for receiving locations with a 1.2 meter diameter antenna• 1.3 dB or less for receiving locations with a 1.0 meter diameter antenna

• Compression – Currently undefined

• Format – CGMS Global Specification for LRIT/HRIT



HRIT/EMWIN Downlink Characteristics

• Coding – BPSK – Convolutional rate ½ code with constraint length 7 concatenated with Reed

Solomon (255,223) with Interleave = 4.– Square Root Raised Cosine filtering using an Alpha factor of 0.3.– The resulting “Necessary Bandwidth” for this signal will be 1.205 MHz.

• Modem Required The predicted C/No is in the range of 63 to 67 dB

• Maximum Demodulator Required– Eb/No is 4.6 dB for a BER of 1x10-8 after decoding.

• Minimum Antenna System– At 5 degree elevation, the minimum antenna is 1.2 meter. – At 10 degrees or more elevation the minimum size is 1.0 meter.– Using a LNA or LNB with a system noise temperature of about 200 K will provide

a G/T of 1.0 dB/K or -0.3 dB/K respectively.



Planned HRIT/EMWIN Resources for UsersTechnology Demonstration Program

• GOES-R Program undertook a project to show that relatively inexpensive receivers designed for the new service could:

– Support HRIT/EMWIN and all of the predecessor services– Software Defined Radio Receiver could consist of a modest

amount of hardware (an antenna, low noise amplifier and a computer interface).

– Design that is available to all users, hobbyist and manufacturers, with the software available to anyone at low or no cost.

– Info on the GOES-R HRIT/EMWIN Users Page• http://www.goes-r.gov/users/hrit.html



HRIT Software Defined Prototype System Diagram

•A Flexible Software Based HRIT/EMWIN Prototype Solution for the GOES-R Transition.•Document - A Flexible Low Cost EMWIN-HRIT Receiver for the GOES-R Transition. •Poster - Hardware Schematic Description.•Document - Hardware Schematic Diagrams.•Document - Notice Regarding Use of ETTUS Corp Documentation.•Document - Software Source Code and Documentation.• Download.zip file - Executable Receiver Software. + Download Software•http://www.goes-r.gov/users/hrit.html



HRIT/EMWIN Summary and Contact Information

• Paul Seymour – LRIT and HRIT/EMWIN Program Manager– [email protected]– 301-817-4521– www.noaasis.noaa.gov

• Rob Wagner - EMWIN and HRIT/EMWIN Program Manager– [email protected]– 301-713-0870 x 154 – http://www.weather.gov/emwin

• Santos Rodriguez - EMWIN and HRIT/EMWIN Program Manager– [email protected]– 301-713-0077 – http://www.weather.gov/emwin

• HRIT/EMWIN Info: http://www.goes-r.gov/users/hrit.html

http://www.weather.gov/emwin




But Wait – There’s More!

• Miami 2011 – Our exhibit was at the end of the hallway.

• We were not getting much traffic.

• How to get people to visit the exhibit?

• Of course; an afternoon severe storm warning associated with a Squall Line!

• All Weather Geeks to the HRIT/EMWIN exhibit!



The Squall Line Arrives!



Our Little Antenna Points Hopefully At The Sky – Where is GOES-13!



You only need the antenna setup and what you see on the left front of the table.

HRIT/EMWIN Exhibit – Perfect!



Scott Rogerson Hopes . . .

Visit the HRIT/EMWIN Exhibit Across the Hall.

WITHOUT THE SQUALL LINE!

Along With Those of the Vendors!

HRIT/EMWIN Exhibit and Poster



HRIT/EMWIN Summary and Contact Information

• Paul Seymour– [email protected]– 301-817-4521– www.noaasis.noaa.gov

• Rob Wagner– [email protected]– 301-713-0870 x 154 – http://www.weather.gov/emwin

• Santos Rodriguez – [email protected]– 301-713-0077 – http://www.weather.gov/emwin

• HRIT/EMWIN Info: http://www.goes-r.gov/users/hrit.html



user readiness for goes-r grb simulator and hrit/emwin

Documents

qc data

l1b products

rimproved data products

mag data

rhcpl1b data

magl2 data

data sourcesimager

l1b suvi