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: 9/7/2025
| 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 | 09/08/2025 | 14:28:53 | 70.11, -40.93 | 64.59 | 09/08/2025 | 14:29:46 | 70.08, -40.95 | 64.55 | 3.34 | 53 |
| 2 | 09/08/2025 | 15:19:35 | -70.01, 126.53 | 115.50 | 09/08/2025 | 15:19:15 | -70.02, 126.60 | 115.50 | 2.54 | 20 |
| 3 | 09/08/2025 | 16:10:03 | 69.06, -64.77 | 63.53 | 09/08/2025 | 16:08:56 | 69.15, -66.94 | 63.67 | 86.86 | 67 |
| 4 | 09/11/2025 | 06:45:46 | 70.07, 74.91 | 65.55 | 09/11/2025 | 06:46:16 | 70.05, 74.88 | 65.53 | 2.64 | 30 |
| 5 | 09/11/2025 | 07:36:28 | -69.97,-117.62 | 114.54 | 09/11/2025 | 07:35:45 | -69.99,-117.57 | 114.52 | 3.00 | 43 |
| 6 | 09/13/2025 | 22:12:02 | -70.51, 22.69 | 112.99 | 09/13/2025 | 22:13:13 | -70.42, 23.65 | 113.11 | 37.03 | 71 |
| 7 | 09/13/2025 | 23:02:39 | 70.03,-169.25 | 66.54 | 09/13/2025 | 23:02:45 | 70.04,-169.25 | 66.54 | 0.68 | 6 |
| 8 | 09/13/2025 | 23:53:20 | -69.94, -1.79 | 113.55 | 09/13/2025 | 23:52:14 | -69.93, -1.77 | 113.56 | 1.23 | 66 |
| 9 | 09/16/2025 | 14:28:47 | -70.11, 139.09 | 112.37 | 09/16/2025 | 14:29:46 | -70.11, 139.09 | 112.38 | 0.30 | 59 |
| 10 | 09/16/2025 | 15:19:31 | 70.00, -53.43 | 67.53 | 09/16/2025 | 15:19:13 | 70.00, -53.42 | 67.53 | 0.56 | 18 |
| 11 | 09/16/2025 | 16:10:02 | -69.32, 114.88 | 113.15 | 09/16/2025 | 16:08:52 | -69.40, 113.39 | 113.05 | 58.89 | 70 |
| 12 | 09/19/2025 | 06:45:40 | -70.09,-105.09 | 111.36 | 09/19/2025 | 06:46:14 | -70.10,-105.04 | 111.36 | 2.40 | 34 |
| 13 | 09/19/2025 | 07:36:24 | 69.98, 62.38 | 68.54 | 09/19/2025 | 07:35:41 | 69.98, 62.45 | 68.55 | 2.62 | 43 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/7/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/07/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9