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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Low Altitude Sun Artificial Horizon Exercise
From: Greg Rudzinski
Date: 2020 Nov 30, 16:50 -0800
From: Greg Rudzinski
Date: 2020 Nov 30, 16:50 -0800
Bill,
Good job ! The calipers are a reasonable alternative to pixel counting if an app isn't available. They can be used on any type of Sun image where the diameter is known. In this image the caliper at 0.1mm = 0.2' moa vs. 1 pixel = 0.1'moa so the calipers are less precise but still pretty good. I recomment the plastic verson so that the lap top screen doesn't get scratched. The attached working notes shows a pixel count vs. caliper side by side.
Greg Rudzinski
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