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: 11/8/2025
| 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 | 11/08/2025 | 23:01:41 | -70.22, 10.72 | 93.03 | 11/08/2025 | 23:02:53 | -70.17, 10.91 | 93.09 | 9.26 | 72 |
| 2 | 11/08/2025 | 23:52:24 | 70.03, 178.33 | 86.79 | 11/08/2025 | 23:52:21 | 70.01, 178.33 | 86.77 | 1.66 | 3 |
| 3 | 11/09/2025 | 00:43:04 | -69.85, -14.09 | 93.39 | 11/09/2025 | 00:41:51 | -69.90, -14.19 | 93.34 | 6.92 | 73 |
| 4 | 11/11/2025 | 15:18:40 | -70.09, 126.68 | 92.42 | 11/11/2025 | 15:19:24 | -70.09, 126.68 | 92.42 | 0.95 | 44 |
| 5 | 11/11/2025 | 16:09:25 | 70.00, -65.89 | 87.51 | 11/11/2025 | 16:08:51 | 69.99, -65.83 | 87.49 | 2.65 | 34 |
| 6 | 11/14/2025 | 06:45:08 | 70.62, 74.26 | 88.82 | 11/14/2025 | 06:46:17 | 70.52, 75.55 | 88.72 | 48.81 | 69 |
| 7 | 11/14/2025 | 07:35:41 | -70.06,-117.54 | 91.73 | 11/14/2025 | 07:35:54 | -70.03,-117.53 | 91.77 | 3.32 | 13 |
| 8 | 11/14/2025 | 08:26:25 | 69.93, 49.97 | 88.15 | 11/14/2025 | 08:25:21 | 69.92, 49.96 | 88.14 | 1.17 | 64 |
| 9 | 11/16/2025 | 23:01:59 | 70.09,-169.15 | 88.96 | 11/16/2025 | 23:02:53 | 70.09,-169.19 | 88.96 | 1.62 | 54 |
| 10 | 11/16/2025 | 23:52:41 | -70.00, -1.69 | 91.13 | 11/16/2025 | 23:52:23 | -69.99, -1.70 | 91.14 | 1.15 | 18 |
| 11 | 11/17/2025 | 00:43:10 | 69.08, 166.95 | 87.97 | 11/17/2025 | 00:42:03 | 69.16, 164.81 | 88.04 | 85.22 | 67 |
| 12 | 11/19/2025 | 14:28:32 | -71.10, 137.66 | 89.40 | 11/19/2025 | 14:29:38 | -71.00, 140.40 | 89.50 | 99.68 | 66 |
| 13 | 11/19/2025 | 15:18:58 | 70.05, -53.33 | 89.55 | 11/19/2025 | 15:19:20 | 70.06, -53.34 | 89.57 | 2.24 | 22 |
| 14 | 11/19/2025 | 16:09:40 | -69.95, 114.14 | 90.55 | 11/19/2025 | 16:08:50 | -69.96, 114.15 | 90.53 | 1.82 | 50 |
| 15 | 11/22/2025 | 06:45:14 | -70.12,-105.00 | 89.80 | 11/22/2025 | 06:46:21 | -70.12,-105.03 | 89.80 | 1.09 | 67 |
| 16 | 11/22/2025 | 07:35:58 | 70.01, 62.47 | 90.11 | 11/22/2025 | 07:35:48 | 70.00, 62.45 | 90.09 | 1.67 | 10 |
| 17 | 11/22/2025 | 08:26:34 | -69.59,-129.58 | 90.31 | 11/22/2025 | 08:25:22 | -69.68,-130.36 | 90.23 | 31.77 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/8/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 11/08/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9