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Old January 29th 12, 02:06 AM posted to alt.photography,rec.photo.digital
Paul in Houston TX
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Default Yosemite in timelapse HD

NM5K wrote:
On 1/28/2012 1:39 PM, Paul in Houston TX wrote:


Many are identical repeats. Meteors often never make it from
horizon to horizon. They fade out.
I don't see any flashing marker lights from very slow moving
aircraft or weather balloons.
Something tells me that many of the effects are digitally
drawn in later. And not just on the night vids.
Nice vids, but not real.


Most I saw were obviously aircraft flying over.
I think the reason you don't notice the marker lights
is that they were using long exposures and the markers
tend to blend together to make one long streak.
They only look like repeats because they are all flying
the same airways. IE: J58-80 runs right across the park
a bit north of Mammoth Lakes running E-W on a line
pretty much from Oakland to Manteca, and then over to
Coaldale NV. There are others, and also an intersection
pretty much right over the park. Some may make turns
at that intersection. The planes flying regular jet airways
airways will not be flying perfect tracks, but pretty
danged close to someone watching from below.
If the planes are using RNP navigation, they will show almost
perfect tracks over the same routes being as the lateral error
is so low.
The Southwest jets I run on my sim are RNP equipped.
The lateral navigation is so accurate that if I were to
approach an airport using an RNP approach, I won't fly
over the same neighborhood every time, I'll fly over the
same houses in that neighborhood every time.
Anyway, to my beady eyeballs, those are all aircraft, with
a few meteors thrown in every once in a while.
Naturally, the meteors don't run from horizon to horizon
like the aircraft do, but fizzle out pretty fast.


Cool! Thank you for the information.