This is a quick and dirty toolchain to decode multiple dropsondes in real time. It uses sdrtst (from the dxlAPRS toolchain) to generate as many FM demodulated audio channels as required from an IQ stream supplied by rtl_tcp. Each audio stream is assigned to a decoder with sox. Decoding is done with the decoder from rs1729. The generated log can be analyzed with analysis_tool.py. It is possible to use multiple RTL-SDR's to cover the whole spectrum from 400Mhz-406MHz. The recordings folder contains a 1-minute recording of an RD41 for test purposes.
For more details see: