marsrad (version 1.0.0)

G_h: Global irradiance on Mars horizontal surface

Description

Calculates the total solar irradiance (direct beam + diffuse + albedo) incident on a horizontal surface on Mars. Implements Equation 17 from Appelbaum & Flood (1990).

Usage

G_h(
  Ls,
  phi,
  longitude,
  Ts = NULL,
  z = Z(Ls = Ls, phi = phi, Ts = Ts),
  tau,
  al = albedo(latitude = phi, longitude = longitude, tau = tau)
)

Value

Global irradiance [W/m²]

Arguments

Ls

Areocentric longitude [deg]

phi

Planetary latitude [deg]

longitude

Planetary longitude [deg]

Ts

Solar time [h]

z

Sun zenith angle [deg]. If not provided, calculated from Ls, phi, and Ts

tau

Atmospheric optical depth (dimensionless)

al

Surface albedo (dimensionless, 0-1). If not provided, calculated from latitude, longitude, and tau