Check out the bookstore at IRBS.com
| Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch |

Re: Question about Pub 249 combined Star and Planet sight reduction

Subject: Re: Question about Pub 249 combined Star and Planet sight reduction
From: Paul Hirose (PaulHirose@XXX.XXX)
Date: Sat Nov 18 2000 - 13:44:33 EST

Seems to me the least squares technique most in the spirit of HO 249 is to
take a weighted, eyeball average of your star fix & planet fix. Or, if the
precession & nutation correction is small compared to the scatter of your LOP
intersections, forget about applying the correction & just eyeball average
all LOPs.

I'm not trying to be flippant -- just seems peculiar to reduce sights with HO
249 if you're concerned about a least squares fit. Why not use the least
squares method in the back of the Almanac?



| Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch | Trawlerworld |