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: 10/15/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 10/16/2025 | 03:47:57 | 0.02, 140.77 | 0.87, 144.50 | 425.52 | 80 |
| 2 | 10/17/2025 | 16:09:42 | -0.02, 140.76 | 0.31, 139.24 | 172.88 | 80 |
| 3 | 10/18/2025 | 15:48:16 | -0.02, 140.76 | -0.69, 143.78 | 344.47 | 80 |
| 4 | 10/20/2025 | 04:10:10 | 0.03, 140.76 | -0.50, 138.49 | 259.23 | 80 |
| 5 | 10/21/2025 | 03:54:05 | 0.03, 140.75 | 0.55, 143.02 | 258.67 | 80 |
| 6 | 10/22/2025 | 16:15:49 | -0.03, 140.73 | 0.66, 137.77 | 338.19 | 80 |
| 7 | 10/23/2025 | 15:54:24 | -0.03, 140.72 | -0.40, 142.30 | 179.82 | 80 |
| 8 | 10/25/2025 | 04:16:18 | 0.02, 140.72 | -0.78, 137.00 | 423.18 | 80 |
| 9 | 10/26/2025 | 04:00:11 | 0.02, 140.71 | 0.22, 141.55 | 95.20 | 80 |
| 10 | 10/28/2025 | 16:00:29 | -0.02, 140.67 | -0.03, 140.84 | 18.32 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/15/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/15/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21