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: 10/20/2025
| 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 | 10/21/2025 | 06:45:10 | -70.43,-105.47 | 98.87 | 10/21/2025 | 06:46:21 | -70.34,-104.73 | 98.96 | 29.41 | 71 |
| 2 | 10/21/2025 | 07:35:49 | 70.02, 62.48 | 80.73 | 10/21/2025 | 07:35:52 | 70.02, 62.46 | 80.73 | 0.86 | 3 |
| 3 | 10/21/2025 | 08:26:30 | -69.91,-130.04 | 99.37 | 10/21/2025 | 08:25:22 | -69.90,-130.07 | 99.38 | 1.54 | 68 |
| 4 | 10/23/2025 | 23:01:55 | -70.12, 10.81 | 98.24 | 10/23/2025 | 23:02:53 | -70.09, 10.81 | 98.27 | 2.86 | 58 |
| 5 | 10/23/2025 | 23:52:38 | 69.98, 178.33 | 81.63 | 10/23/2025 | 23:52:19 | 69.99, 178.30 | 81.64 | 1.68 | 19 |
| 6 | 10/24/2025 | 00:43:08 | -69.29, -13.34 | 99.05 | 10/24/2025 | 00:41:59 | -69.33, -14.97 | 99.02 | 64.24 | 69 |
| 7 | 10/26/2025 | 15:18:44 | -70.08, 126.66 | 97.36 | 10/26/2025 | 15:19:19 | -70.08, 126.68 | 97.36 | 0.93 | 35 |
| 8 | 10/26/2025 | 16:09:28 | 69.94, -65.83 | 82.52 | 10/26/2025 | 16:08:46 | 69.97, -65.83 | 82.54 | 2.71 | 42 |
| 9 | 10/29/2025 | 06:45:00 | 70.54, 74.41 | 83.99 | 10/29/2025 | 06:46:10 | 70.46, 75.49 | 83.91 | 41.34 | 70 |
| 10 | 10/29/2025 | 07:35:33 | -70.00,-117.43 | 96.54 | 10/29/2025 | 07:35:46 | -70.02,-117.51 | 96.52 | 3.57 | 13 |
| 11 | 10/29/2025 | 08:26:18 | 69.92, 50.00 | 83.39 | 10/29/2025 | 08:25:13 | 69.91, 49.98 | 83.38 | 1.84 | 65 |
| 12 | 10/31/2025 | 23:01:42 | 70.11,-169.12 | 84.43 | 10/31/2025 | 23:02:41 | 70.14,-169.08 | 84.46 | 3.26 | 59 |
| 13 | 10/31/2025 | 23:52:23 | -69.99, -1.61 | 95.69 | 10/31/2025 | 23:52:12 | -69.98, -1.67 | 95.70 | 2.36 | 11 |
| 14 | 11/01/2025 | 00:42:57 | 69.33, 166.66 | 83.67 | 11/01/2025 | 00:41:48 | 69.36, 165.14 | 83.70 | 60.03 | 69 |
| 15 | 11/03/2025 | 15:18:31 | 70.06, -53.25 | 85.22 | 11/03/2025 | 15:19:07 | 70.05, -53.30 | 85.21 | 2.42 | 36 |
| 16 | 11/03/2025 | 16:09:11 | -69.93, 114.27 | 94.90 | 11/03/2025 | 16:08:36 | -69.95, 114.19 | 94.89 | 3.56 | 35 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/20/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/20/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9