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: 10/4/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 10/05/2025 | 03:54:26 | 0.03, 140.75 | 0.52, 142.92 | 247.75 | 80 |
| 2 | 10/06/2025 | 16:16:13 | -0.03, 140.71 | 0.64, 137.66 | 347.46 | 80 |
| 3 | 10/07/2025 | 15:54:46 | -0.03, 140.68 | -0.34, 142.20 | 172.23 | 80 |
| 4 | 10/09/2025 | 04:16:41 | 0.03, 140.65 | -0.79, 136.89 | 427.59 | 80 |
| 5 | 10/10/2025 | 04:00:35 | 0.03, 140.62 | 0.19, 141.44 | 92.35 | 80 |
| 6 | 10/12/2025 | 16:00:56 | -0.04, 140.55 | -0.10, 140.70 | 18.10 | 80 |
| 7 | 10/15/2025 | 04:04:04 | 0.05, 140.48 | -0.08, 139.95 | 60.83 | 80 |
| 8 | 10/16/2025 | 03:47:58 | 0.05, 140.44 | 0.97, 144.48 | 460.26 | 80 |
| 9 | 10/17/2025 | 16:09:43 | -0.05, 140.37 | 0.20, 139.22 | 131.60 | 80 |
| 10 | 10/18/2025 | 15:48:17 | -0.05, 140.33 | -0.80, 143.76 | 389.98 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/4/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/04/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21