posted on Dec, 10 2012 @ 01:12 AM
Thanks for the info, Gariac!
Time of year estimate: We first estimate the time of day; this is from the ANGLE of long shadows (towers, poles, etc.) in terms of azimuth relative to
North. As the sun tracks through the sky from dawn to dusk, the shadow will be cast pointing west in the early morning, to north at noon, to east in
the late afternoon.
These images show a slightly northwestern orientation, so a little before noon, probably 1-2 hours.
Once the time of day is estimated, we then look at the LENGTH of the shadows. At summer solstice, noon shadows will be shortest; at winter solstice
they will be longest (in the Northern Hemisphere, of course). We then compare these lengths to imagery - taken close to our target latitude - of known
dates (I know, I know, GE dates are always suspect).
So I looked at a dozen or more images from similar latitudes in NV, Fresno, and the south bay area of San Francisco with known or fairly-well known
dates. The closest length aspects seemed to correspond late winter or late summer time frames, hence March or September, give or take.
I live in Las Vegas. As far as wetness goes, it doesn't much matter what time of year it is, it's almost always dry. Some clues can be gathered from
latent snow cover in the high mountains (say, Mt. Charleston or the Kawich Range north of Groom). There's no snow anywhere that I can find, so I
would tend to agree with you, - assuming the mountain imagery was taken at the same time as the Groom imagery. Late summer or early autumn it is!