Satellite Solar Albedo Earth IR Load Calculator
Spacecraft thermal environment: Quantify external heat fluxes—direct solar radiation ($S_0$), Earth planetary albedo ($q_{\text{alb}}$), Earth thermal infrared ($q_{\text{IR}}$), and passive equilibrium temperature ($T_{\text{eq}}$).
Orbital Geometry & Attitude
LEO altitude ~550 km
0° = Sun directly overhead sub-satellite point
0° = Full Nadir (Facing Earth); 90° = Side
0° = Sun normal to panel; >90° = Shadow
Surface Coating Properties
Fraction of solar spectrum absorbed
Fraction of IR emitted
Environmental Heat Load Output
Total Absorbed Heat Flux:
--
W / m²
Passive Equilibrium Temp T_eq:
--
°C (Kelvin)
Direct Solar:
--
W/m² absorbed
Earth Albedo:
--
W/m² absorbed
Earth IR:
--
W/m² absorbed
| Earth Radiation View Factor F_E: | -- |
| Incident Solar Flux S₀: | 1361 W/m² |
| Earth IR Blackbody Flux: | 237 W/m² |
| Optical Ratio α_s / ε: | -- |
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