Slow Scan Television (SSTV)

Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color. Read more.

This uses the WRASSE SC2-180 mode because it is probably the simplest RGB SSTV mode.

You can download the specification from here. (assuming the link is still up.)