The problem with temperature sensors
Water will absorb light or solar heat to a depth of hundreds of feet on a fine day. On a cloudy day the temperature of the sea's surface is controlled by the stuff that clouds have converted the frequencies of.
OK, they are only looking for gradients in the region of naughtpoinsix degrees Centigrade.
Until they can come up with a multimillion dollar box of tricks that can register air pressures at all levels, they'd be better off picking up the fall-out from the weapons of mass destruction they have scattered all over Falluja.