pub fn jupitershine_irradiance_lux(jupiter_phase_fraction: f64) -> f64 {
1.5 + 15.0 * jupiter_phase_fraction.clamp(0.0, 1.0)
}
pub fn dark_side_visibility_index(jupiter_phase_fraction: f64, terrain_albedo: f64) -> f64 {
jupitershine_irradiance_lux(jupiter_phase_fraction) * terrain_albedo.clamp(0.0, 1.0)
}