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RE : http://www.fer3.com/arc/m2.aspx?i=115171
[NavList] Re: Daytime Jupiter Ex-Meridian/ M.P. /LOP Exercise
From: gregrudzinski---com
Date: 5 Jan 2011 08:32

Greg,

With the extra 3 observations, bringing their grand total to 9, I'm getting the following position :

UT of Jupiter Transit Time (i.e. full south of Observer) : 00h50m54.0s
Observer's Position at Transit time : N34°10'6 W119°09'5
Observations Standard Deviation : 0.3 NM
NOTE : With conventional LOP Software, I am getting exactly the same position and SDEV, which was also the case for our first (6 Observation) set earlier to-day.

COMMENTS : Latitude has remained unchanged, so it should be pretty close from actual Latitude.

Longitude has now moved slightly west from its first determined value at 119°08'6.

New Longitude at 119°09'5 should be closer from actual Longitude since the FIX reliability is higher : wider Time-Span, and wider range of Altitudes(21'6) with SDEV "almost" the same (0.3 NM vs 0.2 NM)

With such an excellent horizon as you had, I would start "feeling" comfortable with a range of Altitudes of 30' or more between highest and lowest ones - provided I am staying inside "permissible" Time-Span for 0.1' method accuracy capability : here 0h14m-01h37m UT - and also with a minimum of 15 observations (we are "almost" there now).

Regards

Kermit
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