NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Navigational Algorithms
From: Michael Bradley
Date: 2006 Oct 24, 17:50 +0100
From: Michael Bradley
Date: 2006 Oct 24, 17:50 +0100
--- "James R. Van Zandt" jrvz@comcast wrote: 'The main technical obstacle is the calculation of all the partial derivatives.' And there's the rub: many a good man has used up too much of life wrestling with numerical differentiation of small data sets - there's a high probability of comprimising the accuracy of the original data with the data smoothing routine normally used with numerical differentiation. On balance, with sparse data, I agree that the signal processing judgments should go through the brain of a navigator, preferably the one charged with the overall conduct of the vessel. With dense data, such as a train of GPS ranges being generated many times per second and from which statistics are 'easily' extracted, the problem becomes more suitable for machine computation. Mike Bradley 55 01 N 1 27 W Send instant messages to your online friends http://uk.messenger.yahoo.com --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---