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: 9/9/2025
| 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 | 09/11/2025 | 06:45:46 | 70.07, 74.91 | 65.55 | 09/11/2025 | 06:46:16 | 70.06, 74.89 | 65.54 | 1.40 | 30 |
| 2 | 09/11/2025 | 07:36:28 | -69.97,-117.63 | 114.54 | 09/11/2025 | 07:35:46 | -69.94,-117.64 | 114.57 | 3.51 | 42 |
| 3 | 09/13/2025 | 22:12:03 | -70.56, 22.61 | 112.94 | 09/13/2025 | 22:13:13 | -70.44, 23.69 | 113.08 | 41.92 | 70 |
| 4 | 09/13/2025 | 23:02:39 | 70.03,-169.25 | 66.53 | 09/13/2025 | 23:02:46 | 70.01,-169.29 | 66.51 | 2.35 | 7 |
| 5 | 09/13/2025 | 23:53:20 | -69.93, -1.79 | 113.55 | 09/13/2025 | 23:52:14 | -69.95, -1.74 | 113.53 | 3.01 | 66 |
| 6 | 09/16/2025 | 14:28:47 | -70.11, 139.10 | 112.38 | 09/16/2025 | 14:29:47 | -70.11, 139.09 | 112.38 | 0.63 | 60 |
| 7 | 09/16/2025 | 15:19:31 | 69.99, -53.42 | 67.52 | 09/16/2025 | 15:19:14 | 70.00, -53.42 | 67.53 | 0.92 | 17 |
| 8 | 09/16/2025 | 16:10:03 | -69.37, 114.81 | 113.10 | 09/16/2025 | 16:08:53 | -69.40, 113.39 | 113.05 | 55.82 | 70 |
| 9 | 09/19/2025 | 06:45:40 | -70.08,-105.08 | 111.37 | 09/19/2025 | 06:46:16 | -70.08,-105.07 | 111.37 | 0.64 | 36 |
| 10 | 09/19/2025 | 07:36:24 | 69.97, 62.40 | 68.53 | 09/19/2025 | 07:35:43 | 69.97, 62.42 | 68.54 | 1.18 | 41 |
| 11 | 09/21/2025 | 22:11:59 | 70.57,-157.39 | 70.16 | 09/21/2025 | 22:13:09 | 70.47,-156.25 | 70.04 | 43.56 | 70 |
| 12 | 09/21/2025 | 23:02:33 | -70.06, 10.73 | 110.36 | 09/21/2025 | 23:02:45 | -70.04, 10.76 | 110.38 | 2.57 | 12 |
| 13 | 09/21/2025 | 23:53:17 | 69.94, 178.21 | 69.54 | 09/21/2025 | 23:52:12 | 69.92, 178.24 | 69.52 | 2.45 | 65 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/9/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9