Definition: (DOD) The natural phenomenon which normally occurs
twice daily when temperature conditions are such that there is a loss of
contrast between two adjacent objects on infrared imagery.
In Laymens terms twice a day the optical technology gap between guys with iron sighted AK's and dudes with ten grand in cool technology is leveled. Folks who figured out when that time was and took advantage could take advantage of that situation. Some guys I know were regularly mortared at just the right time (thermal crossover) in Iraq. They never really figured out a good way to deal with it.
Figured that little tidbit might just interest a few of you.
In Laymens terms twice a day the optical technology gap between guys with iron sighted AK's and dudes with ten grand in cool technology is leveled. Folks who figured out when that time was and took advantage could take advantage of that situation. Some guys I know were regularly mortared at just the right time (thermal crossover) in Iraq. They never really figured out a good way to deal with it.
Figured that little tidbit might just interest a few of you.
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1 comment:
One other effect noted is that in large rocky deserts, rocks, being great thermal mass, are nearly always warmer than people, which is good if you're sneaking through them, and bad if you're watching for people sneaking through them.
Option B is what they invented cans full of pebbles on tripwire in gaps for, or something more definitive at the end of the wire after the Zombie Apocalypse.
Tree trunks full of circulating sap are also obnoxiously warmer than the surroundings.
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