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: 8/14/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 08/15/2025 | 15:49:00 | 0.01, 140.76 | -0.61, 143.58 | 321.47 | 80 |
| 2 | 08/17/2025 | 04:10:56 | 0.01, 140.73 | -0.56, 138.28 | 280.58 | 80 |
| 3 | 08/18/2025 | 03:54:52 | 0.01, 140.72 | 0.47, 142.80 | 236.89 | 80 |
| 4 | 08/19/2025 | 16:16:39 | -0.00, 140.72 | 0.74, 137.54 | 363.35 | 80 |
| 5 | 08/20/2025 | 15:55:15 | 0.00, 140.71 | -0.29, 142.07 | 154.42 | 80 |
| 6 | 08/22/2025 | 04:17:11 | -0.00, 140.68 | -0.86, 136.76 | 445.81 | 80 |
| 7 | 08/23/2025 | 04:01:06 | -0.01, 140.66 | 0.11, 141.30 | 72.94 | 80 |
| 8 | 08/25/2025 | 16:04:09 | 0.01, 140.61 | 0.01, 140.55 | 6.17 | 80 |
| 9 | 08/28/2025 | 04:04:40 | -0.01, 140.53 | -0.17, 139.78 | 85.24 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/14/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/14/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21