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Questions on high altitude pressures



 
 
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  #31  
Old November 26th 08, 01:47 PM posted to rec.aviation.piloting
Viperdoc[_6_]
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Posts: 95
Default Questions on high altitude pressures

Anthony will never admit that he's wrong, nor will he ever accept a point of
view offered by others.

This is why he is a social outcast and can not find or hold a job.



  #32  
Old November 26th 08, 06:28 PM posted to rec.aviation.piloting
Blanche
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Posts: 346
Default Questions on high altitude pressures

And please remember that GPS altitude is based on an "imaginary"
or mathematical model of the earth's surface. Right now I have mine
set to WGS 84. But there are numerous other geodetic datums, such as
WGS 72, Zanderij, and so on.

  #33  
Old November 26th 08, 06:30 PM posted to rec.aviation.piloting
Blanche
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Posts: 346
Default Questions on high altitude pressures

Mxsmanic wrote:

I can point you to dozens of sites that "prove" that Denver's airport overlies
a huge alien base underground, but that doesn't make it so.


Kewl! Tell me where, and I'll drive over and check it out!



  #34  
Old November 26th 08, 07:06 PM posted to rec.aviation.piloting
Mxsmanic
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Posts: 9,169
Default Questions on high altitude pressures

writes:

SA turned off, differential GPS, WAAS, and LAAS.


Differential GPS, WAAS, and LAAS are not part of the GPS system.
  #36  
Old November 26th 08, 08:45 PM posted to rec.aviation.piloting
[email protected]
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Posts: 2,892
Default Questions on high altitude pressures

Blanche wrote:
And please remember that GPS altitude is based on an "imaginary"
or mathematical model of the earth's surface. Right now I have mine
set to WGS 84. But there are numerous other geodetic datums, such as
WGS 72, Zanderij, and so on.


To get real altitude data in general, the receiver must have the smarts
and internal data to do the corrections.

Consumer hiking receivers generally don't have such capabilities.

--
Jim Pennino

Remove .spam.sux to reply.
  #38  
Old November 27th 08, 04:16 AM posted to rec.aviation.piloting
john smith
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Default Questions on high altitude pressures

In article ,
wrote:

The relation between altitude and pressure is actually logrithmic, but
up to about 10,000 feet or so the rule of thumb is pretty close.

For a chart of altitude versus pressure up to 100,000 feet, see:

http://www.engineeringtoolbox.com/ai...ure-d_462.html

Everybodies altimeter is the same and the nonlinear nature of the
atmosphere is one of the reasons everyone sets the altimeter to
29.92 in the flight levels.


Now make it even more interesting and convert the two main component of
the air we breath to their partial pressures.
 




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