Just a note to highlight a new version of Remote_SDR V3 that supports LEO’s and Gpredict for doppler.
Remote_SDR supports Adalmo Pluto, HackRF and rtlsdr (receive only) and runs on a RPI4.

Not the best example since I was shooting the screen with my phone and trying to adjust frequency for new
QSO’s but here is a quick look from todays CAS4B. Radio is a Pluto and receive antenna is a QFH for 137 MHZ !

https://drive.google.com/file/d/1hX2pwa-ZugZFzwqUIUYZ_SRX3VnI4H-s/view?usp=sharing

Looking for a amp to boost the 10mw output of Pluto to 1 watt to feed an 50w amp.

Jeff
K2SDR