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Subject: ex-meridian sights - further question
From: Russell Sher (rsher@XXX.XXX)
Date: Tue Feb 13 2001 - 01:06:37 EST
Hi Steve and thanks for the reply. That does make a bit more sense. By the
way, according to the example in Nories on ex-meridian sights, the resultant
LOP will not run due West-East but is offset by the difference LHA and 0
degrees. Why is this since the sight is 'back-dated' (or pre-dated if taken
before LAN) so that it represents the LAN altitude. Surely then the
ex-meridian LOP should be a latitude? i.e. the latitude which should have
been obtained at LAN. According to the examples the resultant latitude is
just a point on the LOP. If this is true why bother with the ex-meridian
correction??
regards
Russell
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