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Re: Navigate by Skyline
From: Antoine Couëtte
Date: 2022 Aug 26, 07:06 -0700

Interesting challenge, but I am not familiar enough with NYC skyscrapers and landmarks to pinpoint identify them, accurately report them on a "coordinates chart" and draw the applicable "loci" - segments of circles - as functions of their apparent angular separations.

One dark red "metal tower/pylon" seems almost lined up with the ESB "center" and can be used as an "almost" direct alignment. We already have one reliable LOP here as long as we have reliably identified and reported such landmark onto our "map".

Maybe there are one or more direct alignments to familiar and fully qualified eyes.

I would also attempt using the most widely separated landmarks in order to increase position accuracy for better GDOP.

At least that's a safe way of proceeding. I would not play too much with distances as function of elevations because of the refraction / horizon dip unknowns.

And I have to leave it to others - again - for lack of practical knowledge of the area, although I have seen it many times a few years back when I could see it from different JFK Airport viewpoints in the A 343/345 cockpits.

Cannot to date think of any other method. Maybe there is one much more expeditious? If so, (1) that would be great, and (2) I will keep learning from NavList.

And anyway, will a "solution" be published this time ?

Antoine M. "Kermit" Couëtte

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