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Re: Position fix by visual satellite pass. How to identify the bright Star
From: Lars Bergman
Date: 2023 Aug 7, 02:39 -0700
From: Lars Bergman
Date: 2023 Aug 7, 02:39 -0700
Herman,
GHA = GHA Aries + SHA
LHA = GHA + Long (easterly longitude positive)
From these equations you get
LHA = GHA Aries + Long + SHA = LHA Aries + SHA, from which
SHA = LHA - LHA Aries
LHA = ± arccos( sin Ho / (cos Lat · cos Dec) - tan Lat · tan Dec ) = ± 20°. As the body haven't passed the meridian yet, the minus sign is applicable and thus you get LHA = 340°.
Now subtract your LHA Aries of 256° and you get SHA = 84°.
Lars
