airmass -- compute the airmass at a given elevation above horizon
- 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.
- On output, contains the computed airmass.
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