Standard artillery atmosphere

standard artillery atmosphere

A set of values describing atmospheric conditions on which ballistic computations are based, namely, no wind; a surface temperature of 15°C; a surface pressure of 1000 millibars; a surface relative humidity of 78%; and a lapse rate that yields a prescribed density altitude relation.

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1. A gaseous envelope gravitationally bound to a celestial body (e.g., a planet, its satellite, or a star).