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: 10/6/2025
| 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 | 10/07/2025 | 23:02:16 | -70.05, 10.81 | 104.18 | 10/07/2025 | 23:02:52 | -70.06, 10.76 | 104.17 | 2.21 | 36 |
| 2 | 10/07/2025 | 23:53:01 | 69.96, 178.26 | 75.75 | 10/07/2025 | 23:52:19 | 69.96, 178.26 | 75.74 | 0.22 | 42 |
| 3 | 10/10/2025 | 14:28:36 | 70.65, -41.66 | 77.43 | 10/10/2025 | 14:29:46 | 70.54, -40.30 | 77.32 | 51.55 | 70 |
| 4 | 10/10/2025 | 15:19:08 | -70.06, 126.58 | 103.15 | 10/10/2025 | 15:19:23 | -70.05, 126.62 | 103.17 | 2.15 | 15 |
| 5 | 10/10/2025 | 16:09:52 | 69.92, -65.90 | 76.72 | 10/10/2025 | 16:08:50 | 69.94, -65.89 | 76.74 | 2.44 | 62 |
| 6 | 10/13/2025 | 06:45:17 | 70.09, 75.00 | 77.87 | 10/13/2025 | 06:46:24 | 70.10, 74.94 | 77.89 | 2.89 | 67 |
| 7 | 10/13/2025 | 07:35:59 | -70.03,-117.59 | 102.18 | 10/13/2025 | 07:35:54 | -70.00,-117.57 | 102.21 | 3.35 | 5 |
| 8 | 10/13/2025 | 08:26:37 | 69.57, 50.41 | 77.38 | 10/13/2025 | 08:25:26 | 69.61, 49.54 | 77.42 | 34.04 | 71 |
| 9 | 10/15/2025 | 23:02:08 | 70.07,-169.18 | 78.85 | 10/15/2025 | 23:02:54 | 70.08,-169.22 | 78.85 | 1.69 | 46 |
| 10 | 10/15/2025 | 23:52:49 | -69.96, -1.68 | 101.26 | 10/15/2025 | 23:52:24 | -69.97, -1.73 | 101.24 | 2.63 | 25 |
| 11 | 10/18/2025 | 15:18:58 | 70.06, -53.37 | 79.81 | 10/18/2025 | 15:19:22 | 70.07, -53.35 | 79.82 | 1.16 | 24 |
| 12 | 10/18/2025 | 16:09:39 | -69.94, 114.12 | 100.29 | 10/18/2025 | 16:08:52 | -69.97, 114.15 | 100.27 | 2.78 | 47 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/6/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/06/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9