Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between HIMAWARI-9 and NOAA-21 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 8/24/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 08/25/2025 | 16:04:10 | -0.03, 140.75 | -0.02, 140.55 | 22.08 | 80 |
| 2 | 08/26/2025 | 15:42:44 | -0.03, 140.73 | -0.99, 145.09 | 496.84 | 80 |
| 3 | 08/28/2025 | 04:04:41 | 0.03, 140.69 | -0.15, 139.78 | 103.50 | 80 |
| 4 | 08/29/2025 | 03:48:35 | 0.03, 140.67 | 0.82, 144.32 | 415.68 | 80 |
| 5 | 08/30/2025 | 16:10:24 | -0.04, 140.63 | 0.33, 139.05 | 181.12 | 80 |
| 6 | 08/31/2025 | 15:48:59 | -0.03, 140.61 | -0.71, 143.57 | 338.00 | 80 |
| 7 | 09/02/2025 | 04:10:54 | 0.04, 140.57 | -0.48, 138.27 | 262.04 | 80 |
| 8 | 09/03/2025 | 03:54:50 | 0.04, 140.54 | 0.56, 142.80 | 257.55 | 80 |
| 9 | 09/04/2025 | 16:16:38 | -0.05, 140.49 | 0.60, 137.52 | 338.13 | 80 |
| 10 | 09/05/2025 | 15:55:13 | -0.05, 140.46 | -0.38, 142.06 | 181.73 | 80 |
| 11 | 09/07/2025 | 04:17:09 | 0.05, 140.42 | -0.74, 136.75 | 417.31 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/24/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/24/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21