The link for the world map didn’t work for me, but this does: https://www.dit-dit-dit.com/world-map

I have had decent results with the MLA-30Plus loop antenna and they are pretty directional. Jeff K2SDR

Just to add a thought. Listening to the recent QSO Today Podcast with guest John Ackerman N8UR, he mentions Time and Frequency measurement. (~41:00) Ho touches on frequency stability of WWV and states

These are pretty popular: http://www.stridsbergeng.com/multicouplers.html

Oh and the frequencies are: ISS ZARYA" 145.8000 RADFXSAT FOX-1B" 145.9600 FOX-1D AO-92” 145.8800

I auto capture ISS, AO-91 and AO-92 in New Jersey with a 137 MHZ antenna on a Pi and auto upload that and a spectrogram to GDrive. Here is a link, if you want to hear what I receive with that: https:/

I have used FLdigi and other decoding programs on Twente or my websdr. I have done well with everything but NOAA APT @ 137 mhz. The grayscale was crushed. Basically just piping the audio from the webs

To start - KiwiSDR’s have a number of decoders built in under extensions. Cw, fax, fsk, Navtex, wspr etc. http://k2sdr.dyndns.org:8073/ Jeff K2SDR

Just wondering if it is possible to combine these two radios to create a new radio in SDR-Radio? Pennylane/Metis/Atlas for XMIT and Airspy HF+ for receive? Jeff K2SDR