Calculates the direct beam solar irradiance on the Martian surface normal to the solar rays
(i.e., perpendicular to the sun's direction). Uses Beer's law to account for atmospheric
attenuation. Implements Equation 14 from Appelbaum &amp; Flood (1990).

A set of functions to calculate solar irradiance and insolation on Mars horizontal and inclined surfaces. Based on NASA Technical Memoranda 102299, 103623, 105216, 106321, and 106700, i.e. the canonical Mars solar radiation papers.

Georges Labrèche

marsrad

Mars Solar Radiation

G_b function

<dl><dt>Ls</dt>
<dd>Areocentric longitude [deg]</dd>
<dt>phi</dt>
<dd>Planetary latitude [deg]. Can be NULL if z is provided</dd>
<dt>Ts</dt>
<dd>Solar time [h]. Can be NULL if z is provided</dd>
<dt>z</dt>
<dd>Sun zenith angle [deg]. If not provided, calculated from Ls, phi, and Ts</dd>
<dt>tau</dt>
<dd>Atmospheric optical depth (dimensionless)</dd></dl>

Arguments

Direct beam irradiance on Mars surface normal to solar rays — G_b

<dl>

<dt>Ls</dt>
<dd>Areocentric longitude [deg]</dd>


<dt>phi</dt>
<dd>Planetary latitude [deg]. Can be NULL if z is provided</dd>


<dt>Ts</dt>
<dd>Solar time [h]. Can be NULL if z is provided</dd>


<dt>z</dt>
<dd>Sun zenith angle [deg]. If not provided, calculated from Ls, phi, and Ts</dd>


<dt>tau</dt>
<dd>Atmospheric optical depth (dimensionless)</dd>

</dl>

G_b: Direct beam irradiance on Mars surface normal to solar rays

Description

Usage

Value

Arguments