NavList:

   

Reply

GregR wrote-

> Hmmm... just had an idea - I'm going to go back and "massage" all 3
> sights with Navigator to make them overlap perfectly (i.e. zero
> intercepts) and then plot those LOPs - maybe that'll help point to
> where the error in my rough plot is coming from.

It dawned on me that "zero Hs error" is probably a better way to say
that than "zero intercepts" (I use Navigator to check the accuracy of
my own sights, and using a known GPS position as the Assumed Position
the intercept from that position becomes the error for that sight -
hence in this case "zero intercept" = zero sighting error).

And since the horizon wasn't clear the evening that I did the shots for
the exercise, I also introduced some "dither" into the Hs values (via
Navigator) to better reflect reality (and also to generate a cocked-hat
for the fix vs. 3 perfectly crossing LOPs).

So let me re-phrase that to say I'm going to go back and massage the
earlier sights to reflect zero sighting errors so that (hopefully...)
all 3 of them will cross at just one point - which can also serve as a
plotting accuracy exercise.

============================

GregR is inadvertently demonstrating the value of exercises that actually
represent reality, compared with exercises contrived to appear to do so.

George.

contact George Huxtable at george@huxtable.u-net.com
or at +44 1865 820222 (from UK, 01865 820222)
or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.


--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply