Table A3
GRACE-FO thermal radiation panel model. The absorption coefficients of the panels “Port (outer)” and “Starboard (outer)” are taken from the Swarm mission documentation (Siemes, 2020) because the solar arrays on these panels resemble those of the Swarm satellites rather than those of the GRACE satellites on photos. We used an internal heat generation Pgen = 55 W and a heat capacity Cbody = 100 kJ·K−1.
| Panel | Aj (m2) | nx,j (–) | ny,j (–) | nz,j (–) | cvis,a (–) | cir,a (–) | Cj (J·K−1) | kj (W·K−1) |
|---|---|---|---|---|---|---|---|---|
| Zenith | 2.1673620 | 0.0 | 0.0 | −1.0 | 0.65 | 0.81 | 12,000.0 | 0.1 |
| Nadir | 6.0711120 | 0.0 | 0.0 | 1.0 | 0.12 | 0.75 | 10,000.0 | 0.5 |
| Port (outer) | 3.1554792 | 0.0 | −0.766044 | −0.642787 | 0.90 | 0.81 | 18,000.0 | 0.1 |
| Port (inner) | 0.2282913 | 0.0 | 0.766044 | 0.642787 | 0.34 | 0.62 | 800.0 | 0.1 |
| Starboard (outer) | 3.1554792 | 0.0 | 0.766044 | −0.642787 | 0.90 | 0.81 | 18,000.0 | 0.1 |
| Starboard (inner) | 0.2282913 | 0.0 | −0.766044 | 0.642787 | 0.34 | 0.62 | 800.0 | 0.1 |
| Front (panel) | 0.9551567 | 1.0 | 0.0 | 0.0 | 0.34 | 0.62 | 4000.0 | 0.1 |
| Rear (panel) | 0.9551567 | −1.0 | 0.0 | 0.0 | 0.34 | 0.62 | 4000.0 | 0.1 |
| Front (antenna) | 0.0461901 | 1.0 | 0.0 | 0.0 | 0.34 | 0.62 | 400.0 | 0.01 |
| Rear (antenna) | 0.0461901 | −1.0 | 0.0 | 0.0 | 0.34 | 0.62 | 400.0 | 0.01 |
| Port (antenna) | 0.0461901 | 0.0 | −1.0 | 0.0 | 0.34 | 0.62 | 400.0 | 0.01 |
| Starboard (antenna) | 0.0461901 | 0.0 | 1.0 | 0.0 | 0.34 | 0.62 | 400.0 | 0.01 |
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