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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question about barometric pressure vs altitude
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<blockquote data-quote="Mikecr" data-source="post: 833569" data-attributes="member: 1521"><p>I guess you missed the sticky here:</p><p><a href="http://www.longrangehunting.com/forums/f19/altitude-vs-barometric-pressure-11950/" target="_blank">http://www.longrangehunting.com/forums/f19/altitude-vs-barometric-pressure-11950/</a></p><p></p><p>Altitude, including pressure altitude, density altitude, etc, are not external ballistic parameters.</p><p>For local air density you need:</p><p>-Absolute pressure</p><p>-Temperature</p><p>-Relative humidity</p><p></p><p>For your bullet BC input you need to select the atmosphere standard that qualifies your rated BC(like StdMetro, ICAO) as a baseline. These terms are again:</p><p>-Absolute pressure</p><p>-Temperature</p><p>-Relative humidity</p><p></p><p></p><p>Much of the other stuff people come up with amounts to misunderstanding of these things.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 833569, member: 1521"] I guess you missed the sticky here: [url]http://www.longrangehunting.com/forums/f19/altitude-vs-barometric-pressure-11950/[/url] Altitude, including pressure altitude, density altitude, etc, are not external ballistic parameters. For local air density you need: -Absolute pressure -Temperature -Relative humidity For your bullet BC input you need to select the atmosphere standard that qualifies your rated BC(like StdMetro, ICAO) as a baseline. These terms are again: -Absolute pressure -Temperature -Relative humidity Much of the other stuff people come up with amounts to misunderstanding of these things. [/QUOTE]
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Question about barometric pressure vs altitude
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