Since last week's video on this satellite got a lot of interest, here's a followup! I wanted to address the most common questions from last time and correct a couple minor errors. I also wanted to try some different techniques of listening to this satellite, including different frequencies and other antennas.

More information on the satellite here: https://usradioguy.com/satellites/met...

More info on the image scanner system: https://en.wikipedia.org/wiki/Whisk_b...

This is the type of rooftop antenna I use, connected to an SDR and Raspberry Pi computer: https://usradioguy.com/wpcontent/upl...

This is my current favorite softwaredefined radio for general experimenting: https://www.rtlsdr.com/rtlsdrblog...

For better 1.7ghz / HRPT reception, I use a SAWbird+GOES filter/amplifier gadget: https://www.amazon.com/NooelecSAWbir...

The folding satellite dish is a "Cyberex CN7500". I don't think they've been made since the '80s, but this company makes something similar: https://sublunar.com/products

I'm mostly recording satellite signals on Linux using rtl_fm, with the following settings (these might not be the best in every situation, I'm still learning how to do this!):
timeout 15m rtl_fm M raw s 120000 f 137.1M E dc g 48 p 1 (right angle bracket) raw_dump.raw

I'm then using sox to create a wav file:
sox t raw r 120k c 2 b 16 e s "raw_dump.raw" t wav raw_dump.wav

And then I process that wav file with SatDump: https://github.com/SatDump/SatDump

I also tried streaming from my computer with the SDR and antenna, using rtl_tcp as follows:
rtl_tcp f 137.1M s 250000 b 16 a (ip address)
And then connecting from the Recorder tab in SatDump. That seemed to work pretty well. I was told SDR++ works better as the streaming source, but could not get it to install on my Raspberry Pi.

More info on HRPT and antennas here: https://sgcderek.github.io/blog/begin...

I've also tried LeanHRPT, but I did my recording wrong for that: https://www.rtlsdr.com/leanhrptase...

(UPDATE: I heard that Meteor M23 switched BACK to 137.9mhz after I made this, but who knows which frequency they'll finally settle on).




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