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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bris Calibration Image
From: Stan K
Date: 2017 Nov 8, 16:27 -0500
From: Stan K
Date: 2017 Nov 8, 16:27 -0500
FYI, attached is a screen shot of the Celestial Tools solution to the distance question.
Stan
-----Original Message-----
From: Greg Rudzinski <NoReply_Rudzinski@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Mon, Nov 6, 2017 2:55 pm
Subject: [NavList] Re: Bris Calibration Image
From: Greg Rudzinski <NoReply_Rudzinski@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Mon, Nov 6, 2017 2:55 pm
Subject: [NavList] Re: Bris Calibration Image
For an exercise - what is the distance from the mountain peak on Santa Cruz Island as seen in the image back ground ? Mountain peak elevation 1808 ft. Height of eye 8 ft. Hs of peak above horizon 0° 48.2'. For extra credit- what is the azimuth to the peak ? Sun 11/04/2017 UT 23:35:14 Lat34° 10.5'N Lon119° 14.1'W
Greg Rudzinski
From: Greg Rudzinski
Date: 2017 Nov 6, 09:27 -0800This calibration image is taken with the 35mm prime super takumar. The #4 Bris reflection has the upper limb Hs just about exactly zero from an 8ft. height of eye.Lat 34° 10.5 N Lon 119° 14.1 WHs work out backwards to 15° 36' for reflection #4 on this homemade Bris sextant.Greg Rudzinski
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