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 | 10/21/2025 | 06:45:10 | -70.44,-105.49 | 98.86 | 10/21/2025 | 06:46:21 | -70.33,-104.74 | 98.97 | 30.66 | 71 |
| 2 | 10/21/2025 | 07:35:49 | 70.03, 62.45 | 80.75 | 10/21/2025 | 07:35:52 | 70.01, 62.44 | 80.72 | 3.13 | 3 |
| 3 | 10/21/2025 | 08:26:30 | -69.93,-130.06 | 99.35 | 10/21/2025 | 08:25:22 | -69.90,-130.08 | 99.39 | 3.50 | 68 |
| 4 | 10/23/2025 | 23:01:54 | -70.08, 10.87 | 98.28 | 10/23/2025 | 23:02:53 | -70.10, 10.82 | 98.26 | 3.18 | 59 |
| 5 | 10/23/2025 | 23:52:39 | 69.99, 178.31 | 81.64 | 10/23/2025 | 23:52:20 | 69.99, 178.31 | 81.64 | 0.22 | 19 |
| 6 | 10/24/2025 | 00:43:09 | -69.30, -13.35 | 99.04 | 10/24/2025 | 00:42:00 | -69.33, -14.96 | 99.01 | 63.10 | 69 |
| 7 | 10/26/2025 | 15:18:44 | -70.04, 126.72 | 97.40 | 10/26/2025 | 15:19:21 | -70.05, 126.64 | 97.39 | 3.45 | 37 |
| 8 | 10/26/2025 | 16:09:29 | 69.96, -65.84 | 82.53 | 10/26/2025 | 16:08:48 | 69.94, -65.87 | 82.51 | 1.98 | 41 |
| 9 | 10/29/2025 | 06:45:01 | 70.60, 74.31 | 84.05 | 10/29/2025 | 06:46:11 | 70.46, 75.49 | 83.91 | 46.64 | 70 |
| 10 | 10/29/2025 | 07:35:33 | -70.01,-117.44 | 96.54 | 10/29/2025 | 07:35:47 | -70.03,-117.50 | 96.52 | 3.06 | 14 |
| 11 | 10/29/2025 | 08:26:18 | 69.93, 49.99 | 83.40 | 10/29/2025 | 08:25:14 | 69.91, 49.98 | 83.38 | 2.31 | 64 |
| 12 | 10/31/2025 | 23:01:42 | 70.12,-169.13 | 84.44 | 10/31/2025 | 23:02:43 | 70.12,-169.11 | 84.44 | 0.97 | 61 |
| 13 | 10/31/2025 | 23:52:23 | -69.99, -1.62 | 95.68 | 10/31/2025 | 23:52:13 | -70.02, -1.62 | 95.66 | 3.31 | 10 |
| 14 | 11/01/2025 | 00:42:58 | 69.39, 166.58 | 83.73 | 11/01/2025 | 00:41:48 | 69.46, 165.26 | 83.80 | 52.39 | 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