Calculates the angle between the sun's rays and the vertical (zenith) direction.
A zenith angle of 0° means the sun is directly overhead, while 90° means the sun
is at the horizon. Implements Equation 6 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

Z function

<dl><dt>Ls</dt>
<dd>Areocentric longitude [deg]</dd>
<dt>phi</dt>
<dd>Planetary latitude [deg]</dd>
<dt>Ts</dt>
<dd>Solar time [h]</dd></dl>

Arguments

Solar zenith angle — Z

<dl>

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


<dt>phi</dt>
<dd>Planetary latitude [deg]</dd>


<dt>Ts</dt>
<dd>Solar time [h]</dd>

</dl>

Z: Solar zenith angle

Description

Usage

Value

Arguments