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: 9/8/2025
| 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 | 70.06, 74.92 | 65.55 | 09/11/2025 | 06:46:16 | 70.06, 74.90 | 65.54 | 0.96 | 30 |
| 2 | 09/11/2025 | 07:36:28 | -69.97,-117.62 | 114.54 | 09/11/2025 | 07:35:46 | -69.95,-117.63 | 114.56 | 2.44 | 42 |
| 3 | 09/13/2025 | 22:12:02 | -70.55, 22.62 | 112.94 | 09/13/2025 | 22:13:12 | -70.44, 23.69 | 113.08 | 41.57 | 70 |
| 4 | 09/13/2025 | 23:02:38 | 70.02,-169.24 | 66.53 | 09/13/2025 | 23:02:45 | 70.01,-169.29 | 66.51 | 2.65 | 7 |
| 5 | 09/13/2025 | 23:53:20 | -69.93, -1.79 | 113.56 | 09/13/2025 | 23:52:14 | -69.95, -1.74 | 113.54 | 2.91 | 66 |
| 6 | 09/16/2025 | 14:28:47 | -70.10, 139.10 | 112.38 | 09/16/2025 | 14:29:47 | -70.09, 139.07 | 112.39 | 1.67 | 60 |
| 7 | 09/16/2025 | 15:19:31 | 69.99, -53.42 | 67.52 | 09/16/2025 | 15:19:14 | 69.99, -53.44 | 67.52 | 1.02 | 17 |
| 8 | 09/16/2025 | 16:10:02 | -69.32, 114.89 | 113.16 | 09/16/2025 | 16:08:53 | -69.38, 113.37 | 113.07 | 59.99 | 69 |
| 9 | 09/19/2025 | 06:45:40 | -70.08,-105.08 | 111.37 | 09/19/2025 | 06:46:16 | -70.05,-105.10 | 111.40 | 3.07 | 36 |
| 10 | 09/19/2025 | 07:36:24 | 69.97, 62.40 | 68.53 | 09/19/2025 | 07:35:43 | 69.94, 62.39 | 68.51 | 2.86 | 41 |
| 11 | 09/21/2025 | 22:11:59 | 70.57,-157.39 | 70.16 | 09/21/2025 | 22:13:09 | 70.42,-156.32 | 69.99 | 43.49 | 70 |
| 12 | 09/21/2025 | 23:02:33 | -70.06, 10.72 | 110.35 | 09/21/2025 | 23:02:44 | -70.04, 10.77 | 110.38 | 2.79 | 11 |
| 13 | 09/21/2025 | 23:53:17 | 69.95, 178.20 | 69.55 | 09/21/2025 | 23:52:11 | 69.93, 178.26 | 69.53 | 2.92 | 66 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/8/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/08/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9