airmass: Calculate air mass (AM) from zenith angle

In chepec/photoec: Solar spectra and constants for photoelectrochemistry

Calculate air mass (AM) from zenith angle

Description

Calculate the air mass value from the zenith angle

Usage

airmass(z = 48.2)

Arguments

z	zenith angle in degrees (default 48.2° corresponds to AM1.5)

Details

Calculate the air mass (AM) value using the secant approximation. Note that this function only returns physically meaningful values for z <= 70°,

Value

air mass value, numeric

See Also

https://en.wikipedia.org/wiki/Air_mass_(astronomy)

Examples

## Not run: 
    airmass()
    airmass(z = 59.83919) # latitude of chemistry dept at Ångström laboratory

## End(Not run)

chepec/photoec documentation built on July 27, 2023, 11:33 a.m.