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: 9/3/2025
| 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 | 09/05/2025 | 22:12:03 | 70.29,-156.98 | 63.77 | 09/05/2025 | 22:13:14 | 70.23,-156.62 | 63.70 | 15.04 | 71 |
| 2 | 09/05/2025 | 23:02:42 | -70.03, 10.74 | 116.49 | 09/05/2025 | 23:02:46 | -70.01, 10.70 | 116.51 | 2.61 | 4 |
| 3 | 09/05/2025 | 23:53:26 | 69.92, 178.20 | 63.42 | 09/05/2025 | 23:52:13 | 69.91, 178.20 | 63.41 | 1.96 | 73 |
| 4 | 09/08/2025 | 14:28:52 | 70.08, -40.89 | 64.56 | 09/08/2025 | 14:29:45 | 70.11, -40.91 | 64.58 | 3.12 | 53 |
| 5 | 09/08/2025 | 15:19:34 | -69.98, 126.59 | 115.54 | 09/08/2025 | 15:19:15 | -70.00, 126.56 | 115.52 | 2.11 | 19 |
| 6 | 09/08/2025 | 16:10:03 | 69.08, -64.80 | 63.56 | 09/08/2025 | 16:08:56 | 69.12, -66.98 | 63.64 | 86.58 | 67 |
| 7 | 09/11/2025 | 06:45:45 | 70.04, 74.95 | 65.53 | 09/11/2025 | 06:46:15 | 70.06, 74.90 | 65.54 | 2.51 | 30 |
| 8 | 09/11/2025 | 07:36:27 | -69.94,-117.58 | 114.57 | 09/11/2025 | 07:35:45 | -69.95,-117.62 | 114.56 | 1.69 | 42 |
| 9 | 09/13/2025 | 22:12:01 | -70.49, 22.73 | 113.01 | 09/13/2025 | 22:13:12 | -70.41, 23.65 | 113.11 | 35.27 | 71 |
| 10 | 09/13/2025 | 23:02:38 | 70.01,-169.23 | 66.52 | 09/13/2025 | 23:02:44 | 70.02,-169.26 | 66.53 | 1.67 | 6 |
| 11 | 09/13/2025 | 23:53:20 | -69.92, -1.76 | 113.57 | 09/13/2025 | 23:52:14 | -69.92, -1.78 | 113.57 | 0.68 | 66 |
| 12 | 09/16/2025 | 14:28:47 | -70.10, 139.11 | 112.38 | 09/16/2025 | 14:29:45 | -70.12, 139.12 | 112.37 | 2.50 | 58 |
| 13 | 09/16/2025 | 15:19:31 | 70.00, -53.42 | 67.53 | 09/16/2025 | 15:19:12 | 70.01, -53.39 | 67.54 | 1.86 | 19 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/3/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/03/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9