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: 10/11/2025
| 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 | 10/13/2025 | 06:45:18 | 70.13, 74.94 | 77.91 | 10/13/2025 | 06:46:24 | 70.12, 74.96 | 77.90 | 1.07 | 66 |
| 2 | 10/13/2025 | 07:35:59 | -70.02,-117.57 | 102.19 | 10/13/2025 | 07:35:54 | -70.01,-117.56 | 102.20 | 1.23 | 5 |
| 3 | 10/13/2025 | 08:26:37 | 69.55, 50.43 | 77.36 | 10/13/2025 | 08:25:26 | 69.63, 49.55 | 77.44 | 34.80 | 71 |
| 4 | 10/15/2025 | 23:02:09 | 70.10,-169.23 | 78.88 | 10/15/2025 | 23:02:54 | 70.11,-169.18 | 78.88 | 1.80 | 45 |
| 5 | 10/15/2025 | 23:52:50 | -69.99, -1.74 | 101.22 | 10/15/2025 | 23:52:24 | -70.00, -1.70 | 101.22 | 1.77 | 26 |
| 6 | 10/18/2025 | 15:18:59 | 70.09, -53.42 | 79.84 | 10/18/2025 | 15:19:23 | 70.06, -53.36 | 79.82 | 3.31 | 24 |
| 7 | 10/18/2025 | 16:09:40 | -69.97, 114.08 | 100.26 | 10/18/2025 | 16:08:53 | -69.96, 114.13 | 100.28 | 2.52 | 47 |
| 8 | 10/21/2025 | 06:45:11 | -70.48,-105.54 | 98.82 | 10/21/2025 | 06:46:22 | -70.33,-104.74 | 98.97 | 34.25 | 71 |
| 9 | 10/21/2025 | 07:35:49 | 70.03, 62.47 | 80.74 | 10/21/2025 | 07:35:52 | 70.05, 62.50 | 80.76 | 3.00 | 3 |
| 10 | 10/21/2025 | 08:26:30 | -69.91,-130.04 | 99.37 | 10/21/2025 | 08:25:23 | -69.89,-130.08 | 99.39 | 2.41 | 67 |
| 11 | 10/23/2025 | 23:01:55 | -70.11, 10.83 | 98.26 | 10/23/2025 | 23:02:54 | -70.13, 10.85 | 98.24 | 2.41 | 59 |
| 12 | 10/23/2025 | 23:52:40 | 70.03, 178.26 | 81.68 | 10/23/2025 | 23:52:21 | 70.01, 178.33 | 81.66 | 3.52 | 19 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/11/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/11/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9