search

777arc / textbook

216 stars 63 forks source link

Request: NOAA HRPT Decoding #66

Closed zeke800 closed 8 months ago

zeke800 commented 2 years ago

Just as an idea - would it be possible to make a chapter on HRPT decoding? I have many IQ recordings and can supply one in case.

Thank you so much!

777arc commented 2 years ago

So pretty much converting https://github.com/altillimity/SatDump to python? =). It's a continuous stream of BPSK I believe, not unlike RDS which there's already a chapter on, I feel like something that would involve having to detect the start of packets, and/or involve OFDM, would lead to more unique topics being covered between the existing RDS chapter and the next end-to-end one I make.

zeke800 commented 2 years ago

Thank you so much for responding! Haha yes - there are already decoders, but I've always wondered how it does it in the background. Unfortunately, other than the NOAA KLM guide (which is quite complex for me to read), there are virtually zero explanations on this kind of thing (packets, headers, randomizing, etc.).

radio-satellites commented 1 year ago

@777arc @zeke800 I wrote something, it doesn't work that much yet but still something!! https://github.com/radio-satellites/python-hrpt