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 | 23:02:17 | -70.09, 10.75 | 104.14 | 10/07/2025 | 23:02:52 | -70.07, 10.78 | 104.16 | 2.19 | 35 |
| 2 | 10/07/2025 | 23:53:01 | 69.95, 178.28 | 75.73 | 10/07/2025 | 23:52:19 | 69.97, 178.28 | 75.76 | 2.63 | 42 |
| 3 | 10/10/2025 | 14:28:37 | 70.69, -41.73 | 77.47 | 10/10/2025 | 14:29:46 | 70.55, -40.29 | 77.33 | 55.24 | 69 |
| 4 | 10/10/2025 | 15:19:08 | -70.05, 126.60 | 103.16 | 10/10/2025 | 15:19:23 | -70.06, 126.63 | 103.16 | 1.77 | 15 |
| 5 | 10/10/2025 | 16:09:52 | 69.91, -65.88 | 76.71 | 10/10/2025 | 16:08:51 | 69.90, -65.95 | 76.70 | 2.94 | 61 |
| 6 | 10/13/2025 | 06:45:18 | 70.13, 74.94 | 77.91 | 10/13/2025 | 06:46:24 | 70.11, 74.96 | 77.90 | 1.79 | 66 |
| 7 | 10/13/2025 | 07:35:59 | -70.02,-117.57 | 102.19 | 10/13/2025 | 07:35:54 | -70.01,-117.56 | 102.20 | 0.74 | 5 |
| 8 | 10/13/2025 | 08:26:37 | 69.56, 50.42 | 77.37 | 10/13/2025 | 08:25:26 | 69.62, 49.55 | 77.43 | 34.63 | 71 |
| 9 | 10/15/2025 | 23:02:07 | 70.06,-169.16 | 78.83 | 10/15/2025 | 23:02:53 | 70.08,-169.21 | 78.86 | 3.31 | 46 |
| 10 | 10/15/2025 | 23:52:49 | -70.00, -1.75 | 101.22 | 10/15/2025 | 23:52:23 | -69.98, -1.72 | 101.24 | 1.86 | 26 |
| 11 | 10/18/2025 | 15:18:58 | 70.05, -53.36 | 79.80 | 10/18/2025 | 15:19:22 | 70.07, -53.34 | 79.82 | 2.47 | 24 |
| 12 | 10/18/2025 | 16:09:39 | -69.93, 114.14 | 100.31 | 10/18/2025 | 16:08:53 | -69.92, 114.08 | 100.32 | 2.92 | 46 |
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