[quote=chaosmagnet]The weather turned cloudy the second day. A strobe might have helped. She built a fire, but it wasn't spotted by the aircraft FLIR. Keep in mind this was right before the solstice, when we had 19 hrs 17 min of official daylight. During daylight the earth warms, which tends to degrade FLIR performance. Also, it is possible she built the fire after the aircraft stopped flying that day.