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From: Federico Rossi (no email)
Date: Mon Sep 01 2003 - 05:08:44 EDT
Hi everybody,
does anybody know anything about instruments used to actually measure the effective refraction error so to apply a correction to the observed altitude more precise than the standard correction given in the nautical Almanac?
I've found an item on e-bay (2554104294) which I suspect (from the few information I could obtain from the seller) could be such a device.
Thanks
Federico Rossi
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