pvl_absoluteairmass

Determine absolute (pressure corrected) airmass from relative airmass and pressure

Contents

Syntax

AMa = pvl_absoluteairmass(AMrelative, pressure)

Description

Gives the airmass for locations not at sea-level (i.e. not at standard pressure). The input argument AMrelative is the relative airmass. The input argument pressure is the pressure (in Pascals) at the location of interest and must be greater than 0. The calculation for absolute airmass is:

$$AMa = AM \times {\frac{Pressure}{101325}}$$

Inputs

Outputs

Example

Adjust airmass for elevation

AM = 1;
pressure = 80000; %Approximate air pressure at 2000 meters above sea level
AMa = pvl_absoluteairmass(AM, pressure)
AMa =

    0.7895

References

[1] C. Gueymard, "Critical analysis and performance assessment of clear sky solar irradiance models using theoretical and measured data," Solar Energy, vol. 51, pp. 121-138, 1993.

See Also

pvl_relativeairmass

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