.help airmass Mar84 noao.astutil
.ih
NAME
airmass -- compute the airmass at a given elevation above horizon
.ih
USAGE
airmass elevation
.ih
PARAMETERS
.ls elevation
Elevation above horizon in either degrees or radians.
.le
.ls scale = 750.0
Scale factor of the Earth's atmosphere.
.le
.ls radians = no
Input elevation in radians instead of degrees.
.le
.ls airmass
On output, contains the computed airmass.
.le
.ih
EXAMPLE
Compute the airmass at an elevation of 30 degrees above the horizon

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