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Forum: Tech Log

14th Feb 2006, 16:48

Replies: 19

Isogonals and great circles

Views: 9,003

Posted By microburst8265

Hmm, ok, you got me :} But still, the geoid...

Hmm, ok, you got me :} But still, the geoid approximates a surface of equal gravitational potential, and therefore differs from the earth's topographic structure... Or shall I say earth is potato...

Forum: Tech Log

14th Feb 2006, 05:35

Replies: 19

Isogonals and great circles

Views: 9,003

Posted By microburst8265

Hi Dan, well, this only true in two cases: ...

Hi Dan,

well, this only true in two cases:
You are flying along the equator (Track 090/270) or your track is 000/180, when flying along a meridian...

Rumbline distance is always greater or...

Forum: Tech Log

13th Feb 2006, 21:13

Replies: 19

Isogonals and great circles

Views: 9,003

Posted By microburst8265

Hey, the physical shape of the earth is...

Hey,
the physical shape of the earth is probably best resembled as a geoid (equipotential surface approximating mean sea level)...
For Nav Systems an ellipsoid model is used (e.g. WGS84), since the...

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