IRAF help page for package noao.astutil, program airmass

from NOAO airmass -- compute the airmass at a given elevation above horizonUSAGEPARAMETERSEXAMPLE

airmass -- compute the airmass at a given elevation above horizon

USAGE

airmass elevation

PARAMETERS

elevation

Elevation above horizon in either degrees or radians.

scale = 750.0

Scale factor of the Earth's atmosphere.

radians = no

Input elevation in radians instead of degrees.

airmass

On output, contains the computed airmass.

EXAMPLE

Compute the airmass at an elevation of 30 degrees above the horizon 

	cl> airmass 30
	airmass 1.996 at an elevation of 30. degrees (0.5236 radians)
	above horizon

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dmills@noao.edu