sunset

Calculates the sunset time for a horizontal or inclined surface on Mars.
Returns NA during polar night/day periods.

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

sunset function

<dl><dt>Ls</dt>
<dd>Areocentric longitude [deg]</dd>
<dt>phi</dt>
<dd>Planetary latitude [deg]</dd>
<dt>beta</dt>
<dd>Surface tilt angle [deg]. Optional, for inclined surfaces</dd>
<dt>gamma_c</dt>
<dd>Surface azimuth angle [deg]. Optional, for inclined surfaces. Zero facing equator, east negative, west positive (-180 to +180)</dd>
<dt>unit</dt>
<dd>Output unit: 1 for radians, 2 for degrees, 3 for solar hours (default: 1)</dd></dl>

Arguments

Sunset time on Mars — sunset

<dl>

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


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


<dt>beta</dt>
<dd>Surface tilt angle [deg]. Optional, for inclined surfaces</dd>


<dt>gamma_c</dt>
<dd>Surface azimuth angle [deg]. Optional, for inclined surfaces. Zero facing equator, east negative, west positive (-180 to +180)</dd>


<dt>unit</dt>
<dd>Output unit: 1 for radians, 2 for degrees, 3 for solar hours (default: 1)</dd>

</dl>

sunset: Sunset time on Mars

Description

Usage

Value

Arguments