2D maps of H(i) emission using ~ 1m horn antenna

[Robert Hamers]

Over the last month or so I've been working on making 2D maps of H(i) emission using a simple radio horn I built.  I did 24-hour drift scans at 10 different elevations between 30 deg (S) and 60 deg (N), 10 degrees apart, along the meridian. (Spectra ~ 4 min each, SDRPlay RSPdx-R2 + Sawbird H(i), GNUradio/Windows.   I then wrote python programs to calibrate the spectra, spike rejection, background fitting, VLSR correction, peak integration, transform the coordinates to RA/dec and to galactic coordinates, and to make 2D plots.  There's a lot of room for improvement but I'm impressed with what a simple horn and inexpensive electronics +SDR can do. Some plots and a selection of representative spectra below.   

[Stephen Arbogast]

Very  nice...    I use  Ted Cline's  ezRA    here  are my  latest  results ....testing  with Ted's  unreleased software...   See  attached  file .txt   file  for  details  on collection  and processing