NavList:

Hanno Ix,

1. I’m still not sure what you are calculating, or its significance (particularly your part 2). But in part 1, if you want the probability that the navigational observations performed at the true position (TL as you call it) yield a given distance from the TL, you should simple count the fractional number of your blue dots (compared to the total) inside each annulus divided by the area of that annulus. The dimensions of that result would be the probability per unit area. Plot that versus the distance of the annulus from the TL. That’s what most navigators would be interested in – try it. And show us your plot.

2. As I’ve mention before, you’re starting with Gaussian (normal) distribution of lats and lons; I don’t know of any AstroNav sights that give us this.

3. And if you’re starting with fixes formed from two St. Hilaire LOPs, you’d need to calculated the lat & lon probabilities from the altitude probability distributions of the LOPs (there is no azimuth error). But this makes no sense either- we don't do astroNav this way.

Fair Winds,
JK
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