In all my reading about density altitude (relating to shooting), the Army Standard Metro atmosphere, 29.5275 inHg, 59°F, and 78% humidity is referenced. However, Kestrel meters use the International Civil Aviation Organization (ICAO) International Standard Atmosphere (ISA) of 101.325 kPa (29.92inHG?), 15°C (59F) and 0% humidity. Also, JBM uses the ICAO ISA for its ballistic calculations.
Is there a way to change the atmospheric model on the kestrel to the Army Standard?
I guess I don't understand why shooters would use the Army Standard Metro atmosphere for ballistic calculations if the equipment measuring the density altitude is calculating a value based on the ICAO ISA.
Is there a way to change the atmospheric model on the kestrel to the Army Standard?
I guess I don't understand why shooters would use the Army Standard Metro atmosphere for ballistic calculations if the equipment measuring the density altitude is calculating a value based on the ICAO ISA.