First output from SDRplay RSPduo GNU Radio based on modified DSPIRA GRC using small handheld Moxon aerial on aerial input 1 of 2 — 15/10/2025

This will not be Milky Way as inside and Doppler shift on the 1420 MHz line too big – about 190 km/s (calculated from the difference in frequency on plot below and 1420 MHz) – so probably RFI (Radio Frequency Interference) but does it show interference pattern? i.e. is this working as interferometer, albeit not on Milky Way transmission – and hence could I reasonably expect it to work as interferometer once i set up outside pointed at sun or Milky Way?

Andy