Firstly I would like to show a little bit of background this whole observation pack, which I have prepared before the journey. It includes a few major things, which are listed in the main file. The file has been prepared in terms of the Great American Eclipse observation plan. I took into account our observation place and made a detail analysis of the all circumstances. All issues has been covered in the file below (Polish):
This file has been prepared for members of Great AMerican Expedition of Polish Society of Amateur Astronomers (Polish abbreviation: PTMA)
I have analyzed the circumstances for six potential observation venues across the Wyoming, within the umbral diameter distance. An effect was interesting, because (according to Stellarium), every lunar diameter meant about 2% of solar obscuration.
21.08.2017 at 11:38 UTC-7 (Stellarium 0.15.2).
21.08.2017 at 11:40 UTC-7 (Stellarium 0.15.2).
21.08.2017 at 11:42 UTC-7 (Stellarium 0.15.2).
Major total solar eclipse circumstances as shown on the pattern (Stellarium 0.15.2)
One of my observation was chasing the shadow on mountainuous areas, located tens kilometers from our observation venue. The best visible were Owl Creek Mts, located about 30-35km towards north. My reference butt was the Little Wells Butte, located 16km westwards, where 2ndcontact was going to occur about 2 s earlier, than in our place.