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: 10/13/2025
| 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 | 10/15/2025 | 23:02:09 | 70.11,-169.24 | 78.89 | 10/15/2025 | 23:02:54 | 70.09,-169.21 | 78.86 | 2.95 | 45 |
| 2 | 10/15/2025 | 23:52:50 | -70.00, -1.76 | 101.21 | 10/15/2025 | 23:52:24 | -69.98, -1.73 | 101.24 | 3.29 | 26 |
| 3 | 10/18/2025 | 15:18:58 | 70.04, -53.35 | 79.80 | 10/18/2025 | 15:19:23 | 70.04, -53.40 | 79.79 | 2.07 | 25 |
| 4 | 10/18/2025 | 16:09:39 | -69.94, 114.13 | 100.30 | 10/18/2025 | 16:08:53 | -69.93, 114.08 | 100.31 | 2.03 | 46 |
| 5 | 10/21/2025 | 06:45:10 | -70.44,-105.49 | 98.86 | 10/21/2025 | 06:46:21 | -70.34,-104.72 | 98.96 | 30.60 | 71 |
| 6 | 10/21/2025 | 07:35:49 | 70.04, 62.45 | 80.75 | 10/21/2025 | 07:35:52 | 70.01, 62.45 | 80.72 | 3.20 | 3 |
| 7 | 10/21/2025 | 08:26:30 | -69.93,-130.06 | 99.35 | 10/21/2025 | 08:25:22 | -69.91,-130.06 | 99.38 | 2.23 | 68 |
| 8 | 10/23/2025 | 23:01:55 | -70.13, 10.80 | 98.24 | 10/23/2025 | 23:02:53 | -70.13, 10.85 | 98.24 | 2.03 | 58 |
| 9 | 10/23/2025 | 23:52:39 | 69.99, 178.31 | 81.64 | 10/23/2025 | 23:52:20 | 70.01, 178.33 | 81.66 | 2.37 | 19 |
| 10 | 10/24/2025 | 00:43:09 | -69.29, -13.34 | 99.04 | 10/24/2025 | 00:42:00 | -69.36, -14.92 | 98.98 | 62.46 | 69 |
| 11 | 10/26/2025 | 15:18:45 | -70.08, 126.66 | 97.36 | 10/26/2025 | 15:19:21 | -70.10, 126.70 | 97.35 | 2.54 | 36 |
| 12 | 10/26/2025 | 16:09:29 | 69.95, -65.83 | 82.52 | 10/26/2025 | 16:08:48 | 69.98, -65.82 | 82.55 | 3.43 | 41 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/13/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/13/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9