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: 11/23/2025
| 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 | 11/24/2025 | 23:02:13 | -70.07, 10.83 | 89.30 | 11/24/2025 | 23:02:53 | -70.06, 10.76 | 89.31 | 2.91 | 40 |
| 2 | 11/24/2025 | 23:52:57 | 69.96, 178.31 | 90.60 | 11/24/2025 | 23:52:20 | 69.96, 178.26 | 90.60 | 1.96 | 37 |
| 3 | 11/27/2025 | 14:28:38 | 70.52, -41.44 | 91.66 | 11/27/2025 | 14:29:49 | 70.41, -40.50 | 91.54 | 37.26 | 71 |
| 4 | 11/27/2025 | 15:19:13 | -70.05, 126.62 | 88.82 | 11/27/2025 | 15:19:24 | -70.02, 126.58 | 88.85 | 3.13 | 11 |
| 5 | 11/27/2025 | 16:09:57 | 69.94, -65.91 | 91.08 | 11/27/2025 | 16:08:51 | 69.92, -65.92 | 91.06 | 2.38 | 66 |
| 6 | 11/30/2025 | 06:45:31 | 70.14, 74.91 | 91.73 | 11/30/2025 | 06:46:24 | 70.12, 74.96 | 91.70 | 3.26 | 53 |
| 7 | 11/30/2025 | 07:36:13 | -70.03,-117.61 | 88.38 | 11/30/2025 | 07:35:54 | -70.01,-117.56 | 88.40 | 2.71 | 19 |
| 8 | 11/30/2025 | 08:26:42 | 69.13, 51.01 | 90.72 | 11/30/2025 | 08:25:34 | 69.19, 48.97 | 90.79 | 81.21 | 68 |
| 9 | 12/02/2025 | 23:02:29 | 70.09,-169.25 | 92.08 | 12/02/2025 | 23:02:53 | 70.08,-169.21 | 92.07 | 1.70 | 24 |
| 10 | 12/02/2025 | 23:53:11 | -69.97, -1.76 | 88.04 | 12/02/2025 | 23:52:23 | -69.98, -1.73 | 88.03 | 1.44 | 48 |
| 11 | 12/05/2025 | 14:28:44 | -70.13, 139.13 | 87.53 | 12/05/2025 | 14:29:56 | -70.13, 139.09 | 87.53 | 1.49 | 72 |
| 12 | 12/05/2025 | 15:19:28 | 70.04, -53.43 | 92.39 | 12/05/2025 | 15:19:23 | 70.02, -53.42 | 92.36 | 2.51 | 5 |
| 13 | 12/05/2025 | 16:10:07 | -69.76, 114.31 | 87.90 | 12/05/2025 | 16:08:55 | -69.81, 113.91 | 87.85 | 16.33 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 11/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9