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: 10/18/2025
| 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 | 10/18/2025 | 15:18:59 | 70.05, -53.36 | 79.81 | 10/18/2025 | 15:19:23 | 70.08, -53.34 | 79.83 | 3.11 | 24 |
| 2 | 10/18/2025 | 16:09:40 | -69.95, 114.11 | 100.29 | 10/18/2025 | 16:08:53 | -69.97, 114.14 | 100.27 | 2.21 | 47 |
| 3 | 10/21/2025 | 06:45:10 | -70.46,-105.51 | 98.85 | 10/21/2025 | 06:46:21 | -70.32,-104.76 | 98.99 | 32.09 | 71 |
| 4 | 10/21/2025 | 07:35:49 | 70.05, 62.43 | 80.76 | 10/21/2025 | 07:35:51 | 70.04, 62.50 | 80.76 | 2.53 | 2 |
| 5 | 10/21/2025 | 08:26:30 | -69.94,-130.09 | 99.34 | 10/21/2025 | 08:25:21 | -69.93,-130.02 | 99.35 | 2.47 | 69 |
| 6 | 10/23/2025 | 23:01:54 | -70.09, 10.85 | 98.27 | 10/23/2025 | 23:02:53 | -70.09, 10.80 | 98.28 | 2.17 | 59 |
| 7 | 10/23/2025 | 23:52:39 | 70.00, 178.29 | 81.66 | 10/23/2025 | 23:52:20 | 69.97, 178.29 | 81.63 | 3.12 | 19 |
| 8 | 10/24/2025 | 00:43:09 | -69.31, -13.37 | 99.03 | 10/24/2025 | 00:41:59 | -69.37, -14.90 | 98.97 | 60.59 | 70 |
| 9 | 10/26/2025 | 15:18:45 | -70.10, 126.63 | 97.34 | 10/26/2025 | 15:19:20 | -70.10, 126.70 | 97.35 | 2.86 | 35 |
| 10 | 10/26/2025 | 16:09:29 | 69.97, -65.86 | 82.54 | 10/26/2025 | 16:08:47 | 69.98, -65.82 | 82.55 | 2.43 | 42 |
| 11 | 10/29/2025 | 06:45:02 | 70.61, 74.30 | 84.06 | 10/29/2025 | 06:46:11 | 70.50, 75.55 | 83.95 | 48.07 | 69 |
| 12 | 10/29/2025 | 07:35:34 | -70.02,-117.45 | 96.53 | 10/29/2025 | 07:35:48 | -70.02,-117.52 | 96.53 | 2.60 | 14 |
| 13 | 10/29/2025 | 08:26:19 | 69.94, 49.97 | 83.41 | 10/29/2025 | 08:25:14 | 69.95, 50.04 | 83.42 | 3.02 | 65 |
| 14 | 10/31/2025 | 23:01:42 | 70.12,-169.13 | 84.44 | 10/31/2025 | 23:02:43 | 70.11,-169.12 | 84.43 | 0.89 | 61 |
| 15 | 10/31/2025 | 23:52:23 | -69.99, -1.62 | 95.68 | 10/31/2025 | 23:52:13 | -70.01, -1.63 | 95.66 | 2.25 | 10 |
| 16 | 11/01/2025 | 00:42:58 | 69.39, 166.57 | 83.73 | 11/01/2025 | 00:41:48 | 69.45, 165.24 | 83.79 | 52.42 | 70 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/18/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/18/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9