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: 11/14/2025
| 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 | 11/16/2025 | 23:01:59 | 70.12,-169.20 | 88.99 | 11/16/2025 | 23:02:51 | 70.13,-169.14 | 89.00 | 2.31 | 52 |
| 2 | 11/16/2025 | 23:52:40 | -69.98, -1.67 | 91.14 | 11/16/2025 | 23:52:22 | -69.96, -1.74 | 91.16 | 3.65 | 18 |
| 3 | 11/17/2025 | 00:43:09 | 69.06, 166.98 | 87.95 | 11/17/2025 | 00:42:02 | 69.14, 164.79 | 88.02 | 87.50 | 67 |
| 4 | 11/19/2025 | 14:28:31 | -71.04, 137.76 | 89.46 | 11/19/2025 | 14:29:37 | -70.98, 140.38 | 89.52 | 95.15 | 66 |
| 5 | 11/19/2025 | 15:18:58 | 70.03, -53.31 | 89.54 | 11/19/2025 | 15:19:19 | 70.06, -53.35 | 89.56 | 2.98 | 21 |
| 6 | 11/19/2025 | 16:09:40 | -69.94, 114.15 | 90.55 | 11/19/2025 | 16:08:49 | -69.95, 114.13 | 90.55 | 0.98 | 51 |
| 7 | 11/22/2025 | 06:45:14 | -70.12,-105.00 | 89.79 | 11/22/2025 | 06:46:19 | -70.10,-105.04 | 89.82 | 3.02 | 65 |
| 8 | 11/22/2025 | 07:35:58 | 70.01, 62.48 | 90.11 | 11/22/2025 | 07:35:46 | 69.99, 62.44 | 90.08 | 2.95 | 12 |
| 9 | 11/22/2025 | 08:26:33 | -69.54,-129.51 | 90.36 | 11/22/2025 | 08:25:21 | -69.61,-130.45 | 90.30 | 37.22 | 72 |
| 10 | 11/24/2025 | 23:02:13 | -70.11, 10.77 | 89.26 | 11/24/2025 | 23:02:43 | -70.09, 10.85 | 89.28 | 3.13 | 30 |
| 11 | 11/24/2025 | 23:52:56 | 69.95, 178.33 | 90.59 | 11/24/2025 | 23:52:10 | 69.98, 178.33 | 90.62 | 3.27 | 46 |
| 12 | 11/27/2025 | 14:28:29 | 70.11, -40.79 | 91.24 | 11/27/2025 | 14:29:38 | 70.14, -40.82 | 91.27 | 3.40 | 69 |
| 13 | 11/27/2025 | 15:19:12 | -70.05, 126.61 | 88.82 | 11/27/2025 | 15:19:08 | -70.04, 126.67 | 88.83 | 2.61 | 4 |
| 14 | 11/27/2025 | 16:09:51 | 69.69, -65.53 | 90.83 | 11/27/2025 | 16:08:39 | 69.70, -66.16 | 90.84 | 24.22 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/14/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 11/14/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9