Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/4/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 09/05/2025 | 22:12:03 | 70.29,-156.99 | 63.78 | 09/05/2025 | 22:13:14 | 70.23,-156.63 | 63.70 | 15.69 | 71 |
| 2 | 09/05/2025 | 23:02:42 | -70.03, 10.73 | 116.48 | 09/05/2025 | 23:02:45 | -70.06, 10.77 | 116.46 | 2.83 | 3 |
| 3 | 09/05/2025 | 23:53:26 | 69.93, 178.19 | 63.43 | 09/05/2025 | 23:52:13 | 69.90, 178.19 | 63.41 | 3.30 | 73 |
| 4 | 09/08/2025 | 14:28:53 | 70.09, -40.89 | 64.56 | 09/08/2025 | 14:29:46 | 70.10, -40.92 | 64.57 | 1.93 | 53 |
| 5 | 09/08/2025 | 15:19:35 | -69.99, 126.58 | 115.53 | 09/08/2025 | 15:19:16 | -69.99, 126.55 | 115.53 | 1.00 | 19 |
| 6 | 09/08/2025 | 16:10:03 | 69.08, -64.81 | 63.56 | 09/08/2025 | 16:08:56 | 69.11, -66.99 | 63.64 | 86.59 | 67 |
| 7 | 09/11/2025 | 06:45:45 | 70.05, 74.94 | 65.53 | 09/11/2025 | 06:46:15 | 70.05, 74.88 | 65.53 | 2.24 | 30 |
| 8 | 09/11/2025 | 07:36:27 | -69.95,-117.59 | 114.56 | 09/11/2025 | 07:35:45 | -69.94,-117.64 | 114.57 | 2.01 | 42 |
| 9 | 09/13/2025 | 22:12:01 | -70.49, 22.72 | 113.01 | 09/13/2025 | 22:13:12 | -70.40, 23.63 | 113.13 | 35.23 | 71 |
| 10 | 09/13/2025 | 23:02:38 | 70.02,-169.23 | 66.52 | 09/13/2025 | 23:02:44 | 70.01,-169.28 | 66.52 | 1.85 | 6 |
| 11 | 09/13/2025 | 23:53:20 | -69.92, -1.77 | 113.57 | 09/13/2025 | 23:52:14 | -69.91, -1.80 | 113.58 | 1.73 | 66 |
| 12 | 09/16/2025 | 14:28:47 | -70.10, 139.11 | 112.38 | 09/16/2025 | 14:29:45 | -70.11, 139.10 | 112.38 | 0.80 | 58 |
| 13 | 09/16/2025 | 15:19:31 | 69.99, -53.42 | 67.53 | 09/16/2025 | 15:19:12 | 69.99, -53.42 | 67.52 | 0.17 | 19 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/4/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/04/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9