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Question about barometric pressure vs altitude

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Unread 08-01-2013, 05:11 PM
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Join Date: Jan 2008
Location: Northeast
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Re: Question about barometric pressure vs altitude

Originally Posted by Browninglover1 View Post
If you turn off absolute pressure it will allow both fields to be populated (if I remember correctly). I just know that I was sick of trying to figure out the elevation feature when the absolute station pressure gave me perfect results every time.
I turn the absolute pressure button off and enter actual attitude and temperature. My drops are dead on using doing this. Altitude can not be populated in Shooter if the absolute pressure is turned on.

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Unread 08-03-2013, 07:19 PM
RTK RTK is offline
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Join Date: May 2012
Location: Left coast, kalifornia
Posts: 331
Re: Question about barometric pressure vs altitude

Alan, if you are using those pressure charts they are "standard" pressure charts and do not always reflex non standard pressures/temps that you might be experiencing. The most important factors as I "see" it are current barometric pressure (non corrected), and temp. Humidity plays a insignificant role but you can throw that in too, at least that is what we were taught back when I was flying when it came to density altitude and ballistics are all about air density.
Playing here with my shooter program, when absolute pressure is selected, as you mentioned, it does block out altitude. You still have temp and humidity that can be entered, when changing humidity there is no change in drops but when changing temp the drops will change. So if you use "pressure is absolute" don't forget to enter temp and current baro.

Last edited by RTK; 08-03-2013 at 07:56 PM.
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