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The Basics, Starting Out
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<blockquote data-quote="CatShooter" data-source="post: 154861" data-attributes="member: 7"><p>[ QUOTE ]</p><p>That's not entirely true.</p><p></p><p>[/ QUOTE ]</p><p></p><p>Actually... it is entirely true!</p><p></p><p>[ QUOTE ]</p><p>If it were you would always have a set pressure for a given altitude.</p><p></p><p>[/ QUOTE ]</p><p></p><p>I'm afraid that you didn't understand what was said.</p><p></p><p>Nothing was said about a set pressure. The discussion was about how local pressure is reported, and how to enter it into shooting computer programs - and why you must either enter the true local pressure and enter "0" as altitude, or enter the local "adjusted" pressure, and then enter your actual altitude... there was nothing said, or implied, about set pressure.</p><p></p><p>Let me make it simple. In a state like California, you can be at sea level, and a few hundred miles away, you can be at 12,000 feet.</p><p></p><p>If a weather front in aver California, and the pressure at the coast is measured at 30", a few hundred miles away, the measured pressure will be 18". Now, if both stations report their pressures to the state's weather bureau, it will make no sense, because it's the same weather system... so the station at 12,000 will add 12" to their pressure, so it all "normalized" to sea level. in the way, the weather bureau can plot the isobars across the whole state, and map out the weather fronts.</p><p></p><p>It is done that way all over the world.</p><p></p><p>So your problem is...</p><p></p><p>[ QUOTE ]</p><p>There is a correction for altitude but you must include temperature and other factors to get a corrected density altitude.</p><p></p><p>[/ QUOTE ]</p><p></p><p>Sorry... this discussion was about the relationship between altitudes and software corrections.</p><p></p><p>EVERYBODY knows that temperature is part of the final shooting solution, but that is not pare of the discussion here, and temperature does NOT effect the entrance of altitude parameters into the software.</p><p></p><p></p><p>[ QUOTE ]</p><p>I am not sure if you are saying the program is figuring that or not. It's true that if you know a fixed altitude you could adjust an altimiter to read that number and use the derived pressure number. True? </p><p></p><p>[/ QUOTE ]</p><p></p><p>I don't understand why this is a confusing issue.</p><p></p><p>.</p></blockquote><p></p>
[QUOTE="CatShooter, post: 154861, member: 7"] [ QUOTE ] That's not entirely true. [/ QUOTE ] Actually... it is entirely true! [ QUOTE ] If it were you would always have a set pressure for a given altitude. [/ QUOTE ] I'm afraid that you didn't understand what was said. Nothing was said about a set pressure. The discussion was about how local pressure is reported, and how to enter it into shooting computer programs - and why you must either enter the true local pressure and enter "0" as altitude, or enter the local "adjusted" pressure, and then enter your actual altitude... there was nothing said, or implied, about set pressure. Let me make it simple. In a state like California, you can be at sea level, and a few hundred miles away, you can be at 12,000 feet. If a weather front in aver California, and the pressure at the coast is measured at 30", a few hundred miles away, the measured pressure will be 18". Now, if both stations report their pressures to the state's weather bureau, it will make no sense, because it's the same weather system... so the station at 12,000 will add 12" to their pressure, so it all "normalized" to sea level. in the way, the weather bureau can plot the isobars across the whole state, and map out the weather fronts. It is done that way all over the world. So your problem is... [ QUOTE ] There is a correction for altitude but you must include temperature and other factors to get a corrected density altitude. [/ QUOTE ] Sorry... this discussion was about the relationship between altitudes and software corrections. EVERYBODY knows that temperature is part of the final shooting solution, but that is not pare of the discussion here, and temperature does NOT effect the entrance of altitude parameters into the software. [ QUOTE ] I am not sure if you are saying the program is figuring that or not. It's true that if you know a fixed altitude you could adjust an altimiter to read that number and use the derived pressure number. True? [/ QUOTE ] I don't understand why this is a confusing issue. . [/QUOTE]
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