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Steve Markgraf steve at steve-m.deHi, On 17.08.2012 09:09, friedtj at free.fr wrote: > all my attempts at recording signals from satellites (NOAA POES > weather satellites and ISS) have so far failed. For NOAA, I can > sometimes get a faint signal, but nothing worth decoding to get > a weather map (even with a 25 dB LNA preamp). Now, I have found > one web page (cannot remember where) associating the poor > receiver sensitivity to the RTL2832U DAGC. I remember seeing on this > list that someone had managed to disable this DAGC, but is this > functionality avaiable in the gnuradio gr-osmosdr block ? The DAGC is disabled by default in current librtlsdr, so if you use a recent version you should have no problems. In fact, my reception was fine when I tried it (even without LNA). See http://rof.li/pic/groundplane/ Regards, Steve