Thank you much Marcus, I tried reading on internet about libHackRf but no introductions. However, from your comment, I suggest it means I can connect HackRf to tracking software doppler using LibHackRf! Is that it? Best Regards Ernest. Sent from my BlackBerry 10 smartphone.
Dear Ernest,
Haven't used that, but hamlib is something completely different than Gpredict; it's meant to control ham radio equipment, not to predict doppler shift. If I can get that right from quickly having a glimpse at hamlib, it seems like it was written for hardware that connects to (or emulates a) sound card. The HackRF isn't one of these, so you won't be able to interface it with hamlib. Why would you, too? It's bandwidth is much greater, and with gr-osmosdr, there's a very mature and well-maintained interface to GNU Radio. You'll need libhackrf. Generally, for frequencies you can receive with something like the HackRF, a quick, rough estimate tells me that LEO satellites (which probably are what you're concerned about) won't exhibit much more than a couble kHz Doppler; you usually would not re-tune the SDR frontend to correct that, but get a bandwidth that's big enough to contain all your receive spectrum over its full Doppler shift range. Best regards, Marcus On 01.04.2016 20:25, ERNEST MATEY
wrote:
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