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Forum: Tech Log

12th Jun 2012, 20:48

Replies: 51

GPS Question..Please help

Views: 25,869

Posted By ATCast

FP, glad to see we share some frustration! ...

FP, glad to see we share some frustration!
Don't get me started about the FMS!

Being involved in standardization myself, I know what you are talking about. It's a dreadful slow process to get...

Forum: Tech Log

11th Jun 2012, 22:02

Replies: 51

GPS Question..Please help

Views: 25,869

Posted By ATCast

Ah,you must be working in the industry for a...

Ah,you must be working in the industry for a while then!

That is not really consistent is it? :confused:.

Version 2 of the ADS-B Transponder MOPS was published in 2009. The FAA ADS-B...

Forum: Tech Log

10th Jun 2012, 11:43

Replies: 51

GPS Question..Please help

Views: 25,869

Posted By ATCast

Slight thread drift here, but I have to correct...

Slight thread drift here, but I have to correct some inaccuracies.

I won't deny anyone's right to be skeptical but if you read carefully you'll see that the 2008-2013 time frame refers to...

Forum: Tech Log

10th Jun 2012, 10:54

Replies: 51

GPS Question..Please help

Views: 25,869

Posted By ATCast

HFOM, Horizontal Figure of Merit, is for GPS the...

HFOM, Horizontal Figure of Merit, is for GPS the 95% horizontal position accuracy bound, also known as EPU (Estimated Position Uncertainty).

For GPS, HFOM is calculated by:

HFOM = 2 * UERE *...

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