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: 7/25/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 07/25/2025 | 15:42:45 | -0.04, 140.81 | -1.00, 145.09 | 487.43 | 80 |
| 2 | 07/27/2025 | 04:04:42 | 0.05, 140.76 | -0.17, 139.78 | 112.42 | 80 |
| 3 | 07/28/2025 | 03:48:38 | 0.05, 140.75 | 0.84, 144.31 | 405.46 | 80 |
| 4 | 07/29/2025 | 16:10:25 | -0.05, 140.75 | 0.36, 139.04 | 195.60 | 80 |
| 5 | 07/30/2025 | 15:49:01 | -0.05, 140.74 | -0.66, 143.57 | 322.51 | 80 |
| 6 | 08/01/2025 | 04:10:58 | 0.05, 140.68 | -0.50, 138.26 | 276.30 | 80 |
| 7 | 08/02/2025 | 03:54:53 | 0.06, 140.66 | 0.52, 142.79 | 242.26 | 80 |
| 8 | 08/03/2025 | 16:16:42 | -0.06, 140.65 | 0.63, 137.51 | 357.76 | 80 |
| 9 | 08/04/2025 | 15:55:17 | -0.07, 140.63 | -0.39, 142.04 | 160.69 | 80 |
| 10 | 08/06/2025 | 04:17:14 | 0.07, 140.58 | -0.81, 136.74 | 437.85 | 80 |
| 11 | 08/07/2025 | 04:01:09 | 0.08, 140.55 | 0.21, 141.27 | 81.23 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 7/25/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 07/25/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21