Resources to educate students, teachers, and the general public about meteorology, space science, earth-observing satellites, weather phenomena and benefits GOES-R will provide to society.
Information and resources to ensure that the user community is prepared for the new types of satellite imagery and data that will be available from the GOES-R satellite series.
Users: Anyone with an antenna and software capable of receiving GOES direct broadcast downlink
What should I know about GOES-R Rebroadcast?
GOES-R Rebroadcast (GRB) will provide the primary relay of full resolution, calibrated, near-real-time direct broadcast space relay of Level 1b data from each instrument and Level 2 data from the Geostationary Lightning Mapper (GLM). GRB will replace the GOES VARiable (GVAR) service. The GRB contains the ABI, GLM, space environment, and solar data which drive data flow in the NOAA space and Earth environment research and operational framework. Additional information is available in the Product Users Guide.
GRB will use two digital streams, each at 15.5 Mbps, compared to the GVAR standard of a single 2.11 Mbps stream. A dual polarization approach will be used to accommodate the 31 Mbps data rate within a frequency bandwidth of 9.8 or 10.9 MHz per polarization, using a standard downlink modulation at 1686.6 MHz (L-band). GRB will be able to produce a full disk image in either five or fifteen minutes, depending on mode, compared to GVAR’s thirty minutes. Additional technical information regarding data downlink can be found in the Downlink Specifications.
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
Reciver Center Frequency
1685.7 MHz (L-Band)
1686.6 MHz (L-Band)
Data Rate
2.11 Mbps
31 Mbps
Antenna Coverage
Earth Coverage to 5°
Earth Coverage to 5°
Data Sources
Imager and Sounder
ABI (16 bands), GLM, SEISS, EXIS, SUVI, MAG
Space Weather
None
~2 Mbps
Lightning Data
None
0.5 Mbps
The GRB processed instrument data source will be packetized compliant with Consultative Committee for Space Data Systems (CCSDS) standard 133.0-B-l and will utilize lossless data compression to fit within allocated bandwidth. Data blocking and accompanying header metadata will be used to minimize risk of loss due to link errors and allow for user verification of data integrity.
The transition from GVAR to GRB continues to evolve and more information will be communicated through meetings and conferences such as the NOAA Satellite Conference as well as on the GOES-R website.
The content distributed by GRB will be the full set of level 1b products, including data from all ABI channels and the other GOES-R instruments (GLM, MAG, SEISS, SUVI, EXIS, and Magnetometer).
GOES users must upgrade or acquire new antenna and receiver hardware, and acquire processing systems in order to receive the higher volume of GOES-R data via GRB.
GRB Simulators
GRB Simulator Integrated Hardware
Front
Rear
A GRB simulator is being developed and five of them are in production for 2013. The intent is to provide the simulator to the vendors that manufacture GRB receivers in order to verify GRB receive system compatibility with the GRB transmission. Details on how vendors of GRB receivers can request the simulator are under development.
The simulators will be used for:
Purpose:
On-site testing of user ingest and data handling systems, such as GRB field terminal sites.
Simulation of 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.
