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: 9/15/2025
| 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 | 09/16/2025 | 14:28:47 | -70.12, 139.08 | 112.36 | 09/16/2025 | 14:29:46 | -70.14, 139.14 | 112.35 | 3.44 | 59 |
| 2 | 09/16/2025 | 15:19:31 | 70.00, -53.43 | 67.53 | 09/16/2025 | 15:19:14 | 69.99, -53.44 | 67.52 | 1.14 | 17 |
| 3 | 09/16/2025 | 16:10:02 | -69.33, 114.86 | 113.14 | 09/16/2025 | 16:08:53 | -69.38, 113.36 | 113.07 | 59.24 | 69 |
| 4 | 09/19/2025 | 06:45:40 | -70.09,-105.10 | 111.36 | 09/19/2025 | 06:46:16 | -70.06,-105.09 | 111.39 | 3.05 | 36 |
| 5 | 09/19/2025 | 07:36:24 | 69.97, 62.39 | 68.54 | 09/19/2025 | 07:35:43 | 69.96, 62.41 | 68.53 | 1.25 | 41 |
| 6 | 09/21/2025 | 22:11:59 | 70.57,-157.40 | 70.16 | 09/21/2025 | 22:13:09 | 70.46,-156.26 | 70.03 | 43.82 | 70 |
| 7 | 09/21/2025 | 23:02:32 | -70.02, 10.79 | 110.40 | 09/21/2025 | 23:02:45 | -70.02, 10.73 | 110.40 | 2.26 | 13 |
| 8 | 09/21/2025 | 23:53:16 | 69.90, 178.28 | 69.50 | 09/21/2025 | 23:52:12 | 69.92, 178.23 | 69.52 | 3.06 | 64 |
| 9 | 09/24/2025 | 14:28:44 | 70.13, -40.93 | 70.75 | 09/24/2025 | 14:29:43 | 70.12, -40.87 | 70.74 | 2.51 | 59 |
| 10 | 09/24/2025 | 15:19:25 | -70.00, 126.60 | 109.38 | 09/24/2025 | 15:19:13 | -70.02, 126.61 | 109.36 | 1.84 | 12 |
| 11 | 09/24/2025 | 16:09:59 | 69.35, -65.14 | 69.98 | 09/24/2025 | 16:08:49 | 69.41, -66.57 | 70.06 | 56.80 | 70 |
| 12 | 09/27/2025 | 06:45:35 | 70.07, 74.95 | 71.73 | 09/27/2025 | 06:46:10 | 70.10, 74.98 | 71.75 | 3.24 | 35 |
| 13 | 09/27/2025 | 07:36:17 | -69.99,-117.61 | 108.35 | 09/27/2025 | 07:35:40 | -69.99,-117.53 | 108.34 | 2.88 | 37 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/15/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/15/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9