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: 8/11/2025
| 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 | 08/12/2025 | 22:12:05 | -70.17, 23.19 | 124.53 | 08/12/2025 | 22:13:08 | -70.15, 23.27 | 124.56 | 3.39 | 63 |
| 2 | 08/12/2025 | 23:02:48 | 70.03,-169.28 | 55.34 | 08/12/2025 | 23:02:35 | 70.05,-169.23 | 55.36 | 3.34 | 13 |
| 3 | 08/12/2025 | 23:53:23 | -69.54, -1.24 | 125.17 | 08/12/2025 | 23:52:12 | -69.55, -2.28 | 125.11 | 40.40 | 71 |
| 4 | 08/15/2025 | 14:28:59 | -70.11, 139.05 | 123.77 | 08/15/2025 | 14:29:39 | -70.12, 139.11 | 123.76 | 2.66 | 40 |
| 5 | 08/15/2025 | 15:19:42 | 69.97, -53.43 | 56.11 | 08/15/2025 | 15:19:07 | 69.96, -53.47 | 56.10 | 1.92 | 35 |
| 6 | 08/18/2025 | 05:55:22 | 70.81, 86.39 | 57.82 | 08/18/2025 | 05:56:30 | 70.67, 88.17 | 57.61 | 67.12 | 68 |
| 7 | 08/18/2025 | 06:45:52 | -70.06,-105.10 | 122.97 | 08/18/2025 | 06:46:09 | -70.07,-105.08 | 122.96 | 1.93 | 17 |
| 8 | 08/18/2025 | 07:36:36 | 69.98, 62.33 | 56.96 | 08/18/2025 | 07:35:36 | 69.96, 62.41 | 56.95 | 3.18 | 60 |
| 9 | 08/20/2025 | 22:12:04 | 70.14,-156.76 | 57.98 | 08/20/2025 | 22:13:09 | 70.16,-156.71 | 57.99 | 3.47 | 65 |
| 10 | 08/20/2025 | 23:02:46 | -70.01, 10.75 | 122.15 | 08/20/2025 | 23:02:40 | -70.00, 10.70 | 122.15 | 1.92 | 6 |
| 11 | 08/20/2025 | 23:53:23 | 69.56, 178.72 | 57.40 | 08/20/2025 | 23:52:12 | 69.62, 177.81 | 57.49 | 36.00 | 71 |
| 12 | 08/23/2025 | 14:28:58 | 70.10, -40.93 | 58.83 | 08/23/2025 | 14:29:40 | 70.07, -40.96 | 58.80 | 3.37 | 42 |
| 13 | 08/23/2025 | 15:19:40 | -69.97, 126.58 | 121.29 | 08/23/2025 | 15:19:10 | -69.96, 126.53 | 121.29 | 1.95 | 30 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/11/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/11/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9