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: 10/9/2025
| 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 | 10/10/2025 | 14:28:37 | 70.66, -41.68 | 77.45 | 10/10/2025 | 14:29:46 | 70.57, -40.25 | 77.35 | 53.73 | 69 |
| 2 | 10/10/2025 | 15:19:08 | -70.03, 126.63 | 103.19 | 10/10/2025 | 15:19:24 | -70.02, 126.58 | 103.19 | 1.94 | 16 |
| 3 | 10/10/2025 | 16:09:53 | 69.93, -65.92 | 76.74 | 10/10/2025 | 16:08:51 | 69.92, -65.92 | 76.72 | 1.29 | 62 |
| 4 | 10/13/2025 | 06:45:17 | 70.10, 74.99 | 77.88 | 10/13/2025 | 06:46:24 | 70.09, 74.92 | 77.87 | 2.58 | 67 |
| 5 | 10/13/2025 | 07:35:58 | -69.99,-117.52 | 102.22 | 10/13/2025 | 07:35:54 | -69.99,-117.59 | 102.22 | 2.67 | 4 |
| 6 | 10/13/2025 | 08:26:37 | 69.58, 50.39 | 77.39 | 10/13/2025 | 08:25:25 | 69.66, 49.60 | 77.46 | 32.01 | 72 |
| 7 | 10/15/2025 | 23:02:08 | 70.07,-169.18 | 78.85 | 10/15/2025 | 23:02:54 | 70.08,-169.22 | 78.85 | 1.46 | 46 |
| 8 | 10/15/2025 | 23:52:49 | -69.96, -1.69 | 101.26 | 10/15/2025 | 23:52:24 | -69.98, -1.73 | 101.24 | 2.08 | 25 |
| 9 | 10/18/2025 | 15:18:59 | 70.05, -53.37 | 79.81 | 10/18/2025 | 15:19:24 | 70.04, -53.40 | 79.79 | 2.48 | 25 |
| 10 | 10/18/2025 | 16:09:40 | -69.94, 114.13 | 100.30 | 10/18/2025 | 16:08:54 | -69.93, 114.09 | 100.31 | 1.44 | 46 |
| 11 | 10/21/2025 | 06:45:11 | -70.44,-105.49 | 98.86 | 10/21/2025 | 06:46:22 | -70.36,-104.70 | 98.95 | 30.79 | 71 |
| 12 | 10/21/2025 | 07:35:50 | 70.04, 62.44 | 80.76 | 10/21/2025 | 07:35:53 | 70.02, 62.46 | 80.73 | 2.88 | 3 |
| 13 | 10/21/2025 | 08:26:30 | -69.93,-130.06 | 99.35 | 10/21/2025 | 08:25:22 | -69.92,-130.04 | 99.36 | 0.92 | 68 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/9/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9