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    Re: Bris Calibration Image
    From: Greg Rudzinski
    Date: 2017 Nov 6, 11:45 -0800

    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 -0800

    This 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 W

    Hs work out backwards to 15° 36'  for reflection #4 on this homemade Bris sextant. 

    Greg Rudzinski 

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