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All,

A couple of hours before noon today (June 27, 2013), I shot 5 Sun sights from my backyard deck using my Davis Mk. 15 and an artificial horizon. I overlapped the images instead of using the limbs out of habit. (I've been meaning to change that.) Before I began, I recorded an index error of 0!0 and after the last sight it was -5!6. (!) I used my Casio Pathfinder atomic watch (module 3172), which had no error.

Here is the data:

UT Hs
h m s ° '
14 21 37 103 24.0
14 23 46 104 15.2
14 24 58 104 41.4
14 26 36 105 18.6
14 27 48 105 43.2

Given my known latitude of 37°03!3 N, what would you say my longitude is? When I worked it out it wasn't exact, but it was close to my true longitude. I'm posting this partly for fun, but partly to see if I'm doing the calculations correctly, myself. ;)

Regards,
Sean C.
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