A shell script that downloads one of several (mostly satellite weather) images. Optionally composites another image on the downloaded image, if you have image magic installed. Works on os x and linux with ImageMagick for composite stuff.
use: $NM [-c|-f|-i|-m|-v|-w] [overlay file] [composite style] -c GOES east coast color composite (15 mins) -f GOES west hemisphere full disk (3 hrs) -i GOES east coast IR (30 mins) -m die.net mercator full earth (3 hrs) -v GOES east coast vis (30 mins) -w weather.com current weather (?) overlay file: requires ImageMagick resizes to width of downloaded image composite style: default: multiply available: clear, src-over, dst-over, src-in, dst-in, src-out, dst-out, src-atop, dst-atop, xor, plus, multiply, screen, overlay, darken, lighten, color-dodge, color-burn, hard-light, soft-light, difference, exclusion"
goes -f goes -m ~/Pictures/longcat.png goes -c ~/Pictures/kitty.jpg lighten
Depending on monitor(s) and resolution and choice of images you might need to add some resizing stuff in there.
Meant to be run with cron. I might try to rewrite this in perl to eliminate dependencies.
Download link: code.cutup.org/sh/goeshome