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Forum: Tech Log

12th Jan 2012, 07:58

Replies: 21

gps altitude - best use of equipment

Views: 6,429

Posted By ATCast

Phalconphixer, In this document...

Phalconphixer,

In this document (http://www51.honeywell.com/aero/common/documents/Geomentric-Altitude-Paper.pdf) it is briefly explained how GPS height can be used in EGPWS.

Note that an...

Forum: Tech Log

11th Jan 2012, 20:45

Replies: 21

gps altitude - best use of equipment

Views: 6,429

Posted By ATCast

GPS altitude is indeed essentially geometric...

GPS altitude is indeed essentially geometric height above the ground / sea / ellipsoid, and therefor it is not suitable for altitude keeping, for that you need a pressure altimeter. So from an ATC...

Forum: Tech Log

11th Jan 2012, 17:19

Replies: 21

gps altitude - best use of equipment

Views: 6,429

Posted By ATCast

Thanks for that link FlightPathOBN, that will be...

Thanks for that link FlightPathOBN, that will be useful one day sooner or later.

Regarding the various methods used by different boxes, I remember that a common method is described in a NATO...

Forum: Tech Log

11th Jan 2012, 09:49

Replies: 21

gps altitude - best use of equipment

Views: 6,429

Posted By ATCast

GPS height is, as a rule of thumb, up to three...

GPS height is, as a rule of thumb, up to three times less accurate than GPS horizontal position. The GPS horizontal position is typically less then 10 meters off, vertically it's typically accurate...

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