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: 8/11/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 08/12/2025 | 04:04:42 | 0.00, 140.77 | -0.19, 139.78 | 112.20 | 80 |
| 2 | 08/13/2025 | 03:48:37 | 0.00, 140.75 | 0.77, 144.32 | 405.81 | 80 |
| 3 | 08/14/2025 | 16:10:25 | -0.00, 140.75 | 0.38, 139.04 | 193.95 | 80 |
| 4 | 08/15/2025 | 15:49:01 | 0.00, 140.73 | -0.65, 143.57 | 323.95 | 80 |
| 5 | 08/17/2025 | 04:10:57 | -0.01, 140.70 | -0.52, 138.27 | 276.43 | 80 |
| 6 | 08/18/2025 | 03:54:52 | -0.01, 140.68 | 0.45, 142.81 | 241.95 | 80 |
| 7 | 08/19/2025 | 16:16:40 | 0.01, 140.66 | 0.70, 137.53 | 356.78 | 80 |
| 8 | 08/20/2025 | 15:55:15 | 0.02, 140.65 | -0.33, 142.06 | 161.79 | 80 |
| 9 | 08/22/2025 | 04:17:11 | -0.02, 140.60 | -0.89, 136.76 | 437.50 | 80 |
| 10 | 08/23/2025 | 04:01:06 | -0.02, 140.57 | 0.15, 141.29 | 81.99 | 80 |
| 11 | 08/25/2025 | 16:01:30 | 0.02, 140.50 | -0.02, 140.54 | 6.02 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/11/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/11/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21