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: 8/15/2025
| 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 | 08/18/2025 | 05:55:22 | 70.82, 86.38 | 57.82 | 08/18/2025 | 05:56:30 | 70.68, 88.17 | 57.62 | 67.41 | 68 |
| 2 | 08/18/2025 | 06:45:52 | -70.06,-105.11 | 122.96 | 08/18/2025 | 06:46:09 | -70.07,-105.08 | 122.96 | 1.39 | 17 |
| 3 | 08/18/2025 | 07:36:35 | 69.93, 62.41 | 56.91 | 08/18/2025 | 07:35:37 | 69.92, 62.34 | 56.91 | 2.94 | 58 |
| 4 | 08/20/2025 | 22:12:04 | 70.14,-156.77 | 57.98 | 08/20/2025 | 22:13:10 | 70.12,-156.77 | 57.95 | 2.01 | 66 |
| 5 | 08/20/2025 | 23:02:46 | -70.02, 10.73 | 122.14 | 08/20/2025 | 23:02:40 | -70.01, 10.71 | 122.14 | 1.04 | 6 |
| 6 | 08/20/2025 | 23:53:23 | 69.56, 178.72 | 57.40 | 08/20/2025 | 23:52:12 | 69.63, 177.83 | 57.51 | 35.47 | 71 |
| 7 | 08/23/2025 | 14:28:58 | 70.10, -40.93 | 58.84 | 08/23/2025 | 14:29:40 | 70.09, -40.92 | 58.83 | 0.49 | 42 |
| 8 | 08/23/2025 | 15:19:40 | -69.97, 126.57 | 121.29 | 08/23/2025 | 15:19:10 | -69.99, 126.56 | 121.27 | 1.70 | 30 |
| 9 | 08/26/2025 | 05:55:23 | -70.93, -93.80 | 119.40 | 08/26/2025 | 05:56:30 | -70.87, -91.53 | 119.52 | 82.56 | 67 |
| 10 | 08/26/2025 | 06:45:52 | 70.06, 74.90 | 59.72 | 08/26/2025 | 06:46:10 | 70.05, 74.90 | 59.70 | 1.06 | 18 |
| 11 | 08/26/2025 | 07:36:34 | -69.94,-117.60 | 120.41 | 08/26/2025 | 07:35:40 | -69.95,-117.62 | 120.39 | 1.44 | 54 |
| 12 | 08/28/2025 | 22:12:01 | -70.11, 23.29 | 119.32 | 08/28/2025 | 22:13:12 | -70.10, 23.21 | 119.33 | 2.97 | 71 |
| 13 | 08/28/2025 | 23:02:45 | 70.03,-169.28 | 60.62 | 08/28/2025 | 23:02:38 | 70.04,-169.23 | 60.63 | 2.81 | 7 |
| 14 | 08/28/2025 | 23:53:24 | -69.74, -1.54 | 119.67 | 08/28/2025 | 23:52:11 | -69.78, -1.97 | 119.62 | 16.90 | 73 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/15/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/15/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9