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    Re: Kollsman Aircraft Sextants
    From: David Pike
    Date: 2021 Dec 7, 08:37 -0800

    Robert Swartz
    Thanks for that information.
    Calibration inland in the UK at meridian passage is difficult at the moment.  More often than not, the sky is obscured.  When the Sun does look promising AM, it’s quite low and it’s beginning to cloud over by noon.  After dark there’s a security light on a building 400yds south of me playing directly into my bedroom, so light pollution is high.  I did get a quick view of Jupiter on Az180 with the 3V Kollsman last night, but against GPS Anti-Spoof Pro it was showing IE= - 10’, which is worse than my Smiths models, which don’t exceed -5’.  If all IEs are minus, perhaps I ought to wash the bedroom windows and look at the double glazing.  I’m renovating the Astrovan mountings at the moment.  When finished, I can get the heat on in there and take some direct shots.  With luck I can just about twist round as far as South.  If not, it’s Vega in the WNW; but there’s a street-light 10 yards to the west of my house too, and Vega will be moving in Alt + Az. DaveP

       
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