## NAME

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