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: 8/23/2025
| 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 | 08/26/2025 | 05:55:23 | -70.95, -93.83 | 119.37 | 08/26/2025 | 05:56:30 | -70.85, -91.56 | 119.54 | 83.11 | 67 |
| 2 | 08/26/2025 | 06:45:52 | 70.07, 74.88 | 59.73 | 08/26/2025 | 06:46:10 | 70.04, 74.89 | 59.70 | 3.09 | 18 |
| 3 | 08/26/2025 | 07:36:34 | -69.96,-117.63 | 120.39 | 08/26/2025 | 07:35:40 | -69.93,-117.64 | 120.41 | 2.99 | 54 |
| 4 | 08/28/2025 | 22:12:02 | -70.13, 23.26 | 119.30 | 08/28/2025 | 22:13:12 | -70.15, 23.27 | 119.29 | 2.32 | 70 |
| 5 | 08/28/2025 | 23:02:46 | 70.04,-169.29 | 60.63 | 08/28/2025 | 23:02:39 | 70.04,-169.23 | 60.63 | 2.41 | 7 |
| 6 | 08/28/2025 | 23:53:24 | -69.71, -1.49 | 119.70 | 08/28/2025 | 23:52:12 | -69.77, -1.99 | 119.63 | 20.21 | 72 |
| 7 | 08/31/2025 | 14:28:55 | -70.09, 139.08 | 118.37 | 08/31/2025 | 14:29:41 | -70.08, 139.06 | 118.40 | 2.20 | 46 |
| 8 | 08/31/2025 | 15:19:38 | 69.95, -53.39 | 61.50 | 08/31/2025 | 15:19:08 | 69.97, -53.45 | 61.52 | 2.85 | 30 |
| 9 | 09/03/2025 | 05:55:21 | 70.92, 86.22 | 63.45 | 09/03/2025 | 05:56:28 | 70.81, 88.39 | 63.28 | 80.14 | 67 |
| 10 | 09/03/2025 | 06:45:49 | -70.07,-105.10 | 117.43 | 09/03/2025 | 06:46:10 | -70.05,-105.10 | 117.46 | 2.39 | 21 |
| 11 | 09/03/2025 | 07:36:32 | 69.93, 62.42 | 62.44 | 09/03/2025 | 07:35:37 | 69.94, 62.39 | 62.45 | 1.69 | 55 |
| 12 | 09/05/2025 | 22:12:00 | 70.11,-156.71 | 63.59 | 09/05/2025 | 22:13:09 | 70.10,-156.77 | 63.58 | 2.35 | 69 |
| 13 | 09/05/2025 | 23:02:42 | -69.99, 10.79 | 116.52 | 09/05/2025 | 23:02:39 | -70.00, 10.72 | 116.52 | 2.72 | 3 |
| 14 | 09/05/2025 | 23:53:21 | 69.64, 178.62 | 63.13 | 09/05/2025 | 23:52:09 | 69.72, 177.98 | 63.23 | 26.68 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9