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    Re: Longitude by Sunset
    From: Greg Rudzinski
    Date: 2012 May 6, 21:22 -0700

    This sunset image has the upper limb a little bit higher and better defined at 47.4' . The intercept came in at 0.5' T. This is why I think finding a way to work above the horizon even if only one degree will be good enough for a time lunar. I fear the lower limb on the horizon won,t work that good because low altitude refraction will not be the same for both the Sun and the Moon.

    [NavList] Re: Longitude by Sunset
    From: Greg Rudzinski
    Date: 6 May 2012 20:40
    Grabbed a few snaps of todays sunset and low level fog and haze obscures limb tangency with the horizon. I was able to get a LOP from an image that has the upper limb 39.8' above the horizon using my pixel counting and minutes of arc per pixel method. The intercept was 1.0' T with azimuth 290.7*. This is a good result considering that the Sun is so squashed. (200mm lens)

    Greg Rudzinski
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