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: 11/11/2025
| 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 | 11/11/2025 | 15:18:40 | -70.06, 126.72 | 92.45 | 11/11/2025 | 15:19:25 | -70.07, 126.64 | 92.44 | 3.24 | 45 |
| 2 | 11/11/2025 | 16:09:25 | 69.97, -65.84 | 87.48 | 11/11/2025 | 16:08:52 | 69.97, -65.86 | 87.47 | 1.00 | 33 |
| 3 | 11/14/2025 | 06:45:07 | 70.59, 74.31 | 88.79 | 11/14/2025 | 06:46:17 | 70.51, 75.52 | 88.71 | 45.94 | 70 |
| 4 | 11/14/2025 | 07:35:40 | -70.04,-117.50 | 91.76 | 11/14/2025 | 07:35:54 | -70.01,-117.56 | 91.79 | 3.48 | 14 |
| 5 | 11/14/2025 | 08:26:24 | 69.90, 50.01 | 88.12 | 11/14/2025 | 08:25:21 | 69.91, 49.94 | 88.12 | 2.79 | 63 |
| 6 | 11/16/2025 | 23:01:59 | 70.12,-169.19 | 88.99 | 11/16/2025 | 23:02:52 | 70.14,-169.13 | 89.01 | 2.99 | 53 |
| 7 | 11/16/2025 | 23:52:40 | -69.98, -1.66 | 91.15 | 11/16/2025 | 23:52:23 | -69.97, -1.73 | 91.15 | 2.76 | 17 |
| 8 | 11/17/2025 | 00:43:10 | 69.11, 166.91 | 88.00 | 11/17/2025 | 00:42:03 | 69.14, 164.79 | 88.03 | 84.12 | 67 |
| 9 | 11/19/2025 | 15:18:59 | 70.08, -53.37 | 89.58 | 11/19/2025 | 15:19:21 | 70.06, -53.36 | 89.56 | 2.01 | 22 |
| 10 | 11/19/2025 | 16:09:41 | -69.98, 114.09 | 90.51 | 11/19/2025 | 16:08:51 | -69.95, 114.13 | 90.54 | 3.21 | 50 |
| 11 | 11/22/2025 | 06:45:14 | -70.10,-104.97 | 89.81 | 11/22/2025 | 06:46:22 | -70.11,-105.03 | 89.80 | 2.64 | 68 |
| 12 | 11/22/2025 | 07:35:58 | 69.99, 62.50 | 90.09 | 11/22/2025 | 07:35:49 | 70.00, 62.45 | 90.09 | 2.19 | 9 |
| 13 | 11/22/2025 | 08:26:35 | -69.63,-129.63 | 90.28 | 11/22/2025 | 08:25:23 | -69.68,-130.37 | 90.23 | 28.92 | 72 |
| 14 | 11/24/2025 | 23:02:13 | -70.08, 10.82 | 89.29 | 11/24/2025 | 23:02:48 | -70.07, 10.80 | 89.30 | 0.69 | 35 |
| 15 | 11/24/2025 | 23:52:57 | 69.98, 178.28 | 90.62 | 11/24/2025 | 23:52:15 | 69.96, 178.28 | 90.60 | 2.10 | 42 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/11/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 11/11/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9