Resources

Links

About the satellites and the signals (GOES-R series):

• HRIT/EMWIN:

  • https://www.goes-r.gov/users/hrit.html

  • https://www.goes-r.gov/hrit_emwin/ATR-2010-5482.pdf

• GOES Rebroadcast (GRB):

  • https://www.goes-r.gov/users/grb.html

  • https://www.goes-r.gov/users/docs/GRB_downlink.pdf

Because HRIT is similar to LRIT at a higher baud rate, documentation for LRIT is also relevant for HRIT. The documents below used to be hosted by NOAA until ~2020. They’re mirrored here for posterity.

• 3_LRIT_Receiver-specs.pdf

• 4_LRIT_Transmitter-specs.pdf

• 5_LRIT_Mission-data.pdf

The blog series by Lucas Teske is a great resource:

• http://www.teske.net.br/lucas/2016/10/goes-satellite-hunt-part-1-antenna-system/

Notes

Reed-Solomon

From the LRIT receiver specs:

The LRIT dissemination service is a Grade-2 service; therefore, the transmission of user data will be error controlled using Reed-Solomon coding as an outer code. The used Reed-Solomon code is (255,223) with an interleaving of I = 4.

Data must be transformed from Berlekamp’s dual basis representation to conventional representation before we can run the Reed-Solomon algorithm provided by libcorrect.

Refer to CCSDS 101.0-B-6 (Recommendation For Space Data System Standards: Telemetry Channel Coding) to learn more about the Reed-Solomon specifics for this application, the dual basis representation, and how to transform data between conventional representation and dual basis representation.