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')
# Glow (sdr-radio v3)
set palette defined (0 '#000000', \
1 '#900000', \
2 '#ff0000', \
3 '#ff2600', \
4 '#ff7b00', \
5 '#ffd500', \
6 '#ffff26', \
7 '#ffff81', \
8 '#ffffff')
