Greetings,

I have been playing with some alternate waterfall gradients, trying to find one that gives better contrast at low SNR. I’m posting here some samples together with the gnuplot code so that people can try it.

# current palette set palette defined (0 '#aa00ff',\ 1 '#6200ea',\ 2 '#2962ff',\ 3 '#00b8d4',\ 4 '#00bfa5',\ 5 '#00c853',\ 6 '#64dd17 ',\ 7 '#aeea00',\ 9 '#ffd600 ',\ 10 '#ffab00 ',\ 11 '#ff6d00',\ 12 '#d50000')

# Blue-white (sdr-radio v3) set palette defined (0 '#020324', \ 1 '#2e3d7d', \ 2 '#4f69bf', \ 3 '#7296ff', \ 4 '#6a8df5', \ 5 '#a4bbff', \ 6 '#d5e0ff', \ 7 '#ffffff', \ 8 '#ffffff', \ 9 '#ffffff', \ 10 '#ffff00')

# SDR# set palette defined (0 '#000020', \ 1 '#000030', \ 2 '#000050', \ 3 '#000091', \ 4 '#1E90FF', \ 5 '#FFFFFF', \ 6 '#FFFF00', \ 7 '#FE6D16', \ 8 '#FF0000', \ 9 '#C60000', \ 10 '#9F0000', \ 11 '#750000', \ 12 '#4A0000')

# linrad set palette defined (0 '#000000', \ 1 '#000061', \ 2 '#003c71', \ 3 '#008550', \ 4 '#28a100', \ 5 '#c28500', \ 6 '#d25900', \ 7 '#ff2828', \ 8 '#ffaeae', \ 9 '#ffffff', \ 10 '#ffffff')

# black and white set palette defined (0 '#000000', \ 1 '#313131', \ 2 '#696969', \ 3 '#a3a3a3', \ 4 '#c6c6c6', \ 5 '#d3d3d3', \ 6 '#e0e0e0', \ 7 '#ececec', \ 8 '#fbfbfb', \ 9 '#ffffff')

# Nature (sdr-radio v3) set palette defined (0 '#000000', \ 1 '#004800', \ 2 '#007700', \ 3 '#4aa44a', \ 4 '#99cc99', \ 5 '#e6f2e6', \ 6 '#ffffff', \ 7 '#ffffe8', \ 8 '#ffff0b')

# Spectravue set palette defined (0 '#000000', \ 1 '#0000e7', \ 2 '#0094ff', \ 3 '#00ffb8', \ 4 '#2eff00', \ 5 '#ffff00', \ 6 '#ff8800', \ 7 '#ff0000', \ 8 '#ff007c')