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: 10/23/2025
| 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 | 10/23/2025 | 23:01:54 | -70.08, 10.86 | 98.28 | 10/23/2025 | 23:02:53 | -70.08, 10.78 | 98.29 | 3.03 | 59 |
| 2 | 10/23/2025 | 23:52:39 | 69.99, 178.31 | 81.64 | 10/23/2025 | 23:52:20 | 69.97, 178.28 | 81.63 | 2.23 | 19 |
| 3 | 10/24/2025 | 00:43:09 | -69.30, -13.36 | 99.03 | 10/24/2025 | 00:41:59 | -69.36, -14.92 | 98.98 | 61.36 | 70 |
| 4 | 10/26/2025 | 15:18:45 | -70.10, 126.63 | 97.34 | 10/26/2025 | 15:19:20 | -70.07, 126.67 | 97.37 | 3.10 | 35 |
| 5 | 10/26/2025 | 16:09:29 | 69.96, -65.84 | 82.53 | 10/26/2025 | 16:08:47 | 69.96, -65.84 | 82.54 | 1.03 | 42 |
| 6 | 10/29/2025 | 06:45:00 | 70.55, 74.39 | 84.00 | 10/29/2025 | 06:46:10 | 70.47, 75.50 | 83.92 | 42.14 | 70 |
| 7 | 10/29/2025 | 07:35:33 | -70.02,-117.45 | 96.53 | 10/29/2025 | 07:35:46 | -70.03,-117.50 | 96.52 | 2.59 | 13 |
| 8 | 10/29/2025 | 08:26:18 | 69.93, 49.99 | 83.40 | 10/29/2025 | 08:25:13 | 69.92, 49.99 | 83.39 | 1.31 | 65 |
| 9 | 10/31/2025 | 23:01:42 | 70.11,-169.13 | 84.43 | 10/31/2025 | 23:02:42 | 70.11,-169.12 | 84.43 | 0.34 | 60 |
| 10 | 10/31/2025 | 23:52:23 | -69.99, -1.62 | 95.68 | 10/31/2025 | 23:52:12 | -70.01, -1.64 | 95.67 | 1.45 | 11 |
| 11 | 11/01/2025 | 00:42:57 | 69.33, 166.66 | 83.67 | 11/01/2025 | 00:41:48 | 69.39, 165.17 | 83.73 | 58.81 | 69 |
| 12 | 11/03/2025 | 15:18:31 | 70.06, -53.24 | 85.22 | 11/03/2025 | 15:19:08 | 70.05, -53.31 | 85.21 | 2.94 | 37 |
| 13 | 11/03/2025 | 16:09:13 | -69.98, 114.19 | 94.85 | 11/03/2025 | 16:08:37 | -70.00, 114.25 | 94.84 | 2.91 | 36 |
| 14 | 11/06/2025 | 06:44:48 | -70.75,-105.86 | 93.28 | 11/06/2025 | 06:45:57 | -70.61,-104.23 | 93.42 | 61.83 | 69 |
| 15 | 11/06/2025 | 07:35:21 | 70.06, 62.55 | 86.04 | 11/06/2025 | 07:35:32 | 70.05, 62.60 | 86.03 | 1.95 | 11 |
| 16 | 11/06/2025 | 08:26:02 | -69.93,-129.93 | 94.09 | 11/06/2025 | 08:25:02 | -69.95,-129.91 | 94.07 | 2.97 | 60 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9