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: 10/29/2025
| 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 | 10/31/2025 | 23:01:42 | 70.12,-169.14 | 84.44 | 10/31/2025 | 23:02:42 | 70.13,-169.09 | 84.45 | 2.16 | 60 |
| 2 | 10/31/2025 | 23:52:23 | -70.01, -1.65 | 95.67 | 10/31/2025 | 23:52:12 | -70.02, -1.62 | 95.66 | 1.62 | 11 |
| 3 | 11/01/2025 | 00:42:58 | 69.39, 166.57 | 83.74 | 11/01/2025 | 00:41:48 | 69.42, 165.19 | 83.75 | 53.80 | 70 |
| 4 | 11/03/2025 | 15:18:31 | 70.06, -53.25 | 85.22 | 11/03/2025 | 15:19:09 | 70.04, -53.33 | 85.20 | 3.71 | 38 |
| 5 | 11/03/2025 | 16:09:13 | -69.99, 114.17 | 94.84 | 11/03/2025 | 16:08:38 | -69.99, 114.23 | 94.85 | 2.38 | 35 |
| 6 | 11/06/2025 | 06:44:49 | -70.81,-105.96 | 93.22 | 11/06/2025 | 06:45:57 | -70.69,-104.13 | 93.34 | 68.65 | 68 |
| 7 | 11/06/2025 | 07:35:20 | 70.01, 62.62 | 85.99 | 11/06/2025 | 07:35:34 | 70.03, 62.55 | 86.00 | 3.52 | 14 |
| 8 | 11/06/2025 | 08:26:02 | -69.94,-129.95 | 94.08 | 11/06/2025 | 08:25:04 | -69.92,-129.97 | 94.10 | 1.80 | 58 |
| 9 | 11/08/2025 | 23:01:26 | -70.14, 10.92 | 93.12 | 11/08/2025 | 23:02:32 | -70.10, 10.91 | 93.16 | 3.60 | 66 |
| 10 | 11/08/2025 | 23:52:10 | 70.02, 178.41 | 86.78 | 11/08/2025 | 23:51:59 | 69.99, 178.39 | 86.74 | 3.46 | 11 |
| 11 | 11/09/2025 | 00:42:45 | -69.57, -13.61 | 93.67 | 11/09/2025 | 00:41:33 | -69.66, -14.43 | 93.58 | 33.37 | 72 |
| 12 | 11/11/2025 | 15:18:14 | -70.09, 126.78 | 92.42 | 11/11/2025 | 15:18:55 | -70.09, 126.79 | 92.42 | 0.71 | 41 |
| 13 | 11/11/2025 | 16:08:58 | 69.98, -65.74 | 87.49 | 11/11/2025 | 16:08:22 | 69.97, -65.73 | 87.47 | 1.42 | 36 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/29/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/29/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9