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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Averaging
From: Bill B
Date: 2004 Oct 21, 00:05 -0500
From: Bill B
Date: 2004 Oct 21, 00:05 -0500
Thank you Fred, What do you consider to be the upper limit of systematic shift due to averaging that is acceptable, or is that situational? Bill > On Oct 20, 2004, at 7:09 PM, Bill wrote: > >> My question, is there a rule of thumb that might indicate when >> averages are >> acceptable and when not. For example, for error of .4' or less (due >> totally to systematic errors from averaging) difference between >> latitude and >> declination, plus altitude should exceed 60d (or any other number that >> the >> gurus decide is reasonable? >> > > Bill, > > I'm no guru, let me assure you, but as best as I can tell, as long as > you're 10 minutes away from meridian passage, averages or a straight > line are fine, regardless of declination and latitude. This is for > short periods, such as 5 minutes. > > Fred
