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: 8/27/2025
| 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 | 08/28/2025 | 22:12:01 | -70.12, 23.27 | 119.30 | 08/28/2025 | 22:13:11 | -70.15, 23.27 | 119.28 | 3.15 | 70 |
| 2 | 08/28/2025 | 23:02:45 | 70.03,-169.28 | 60.62 | 08/28/2025 | 23:02:38 | 70.05,-169.22 | 60.64 | 3.26 | 7 |
| 3 | 08/28/2025 | 23:53:23 | -69.70, -1.48 | 119.71 | 08/28/2025 | 23:52:11 | -69.77, -1.98 | 119.63 | 20.82 | 72 |
| 4 | 08/31/2025 | 14:28:55 | -70.09, 139.09 | 118.38 | 08/31/2025 | 14:29:40 | -70.12, 139.12 | 118.36 | 3.24 | 45 |
| 5 | 08/31/2025 | 15:19:38 | 69.95, -53.38 | 61.49 | 08/31/2025 | 15:19:08 | 69.96, -53.46 | 61.51 | 3.53 | 30 |
| 6 | 09/03/2025 | 05:55:21 | 70.92, 86.22 | 63.45 | 09/03/2025 | 05:56:28 | 70.78, 88.35 | 63.26 | 79.14 | 67 |
| 7 | 09/03/2025 | 06:45:49 | -70.07,-105.11 | 117.43 | 09/03/2025 | 06:46:09 | -70.07,-105.07 | 117.43 | 1.50 | 20 |
| 8 | 09/03/2025 | 07:36:32 | 69.92, 62.43 | 62.44 | 09/03/2025 | 07:35:37 | 69.91, 62.35 | 62.43 | 3.29 | 55 |
| 9 | 09/05/2025 | 22:12:00 | 70.11,-156.71 | 63.59 | 09/05/2025 | 22:13:08 | 70.11,-156.76 | 63.58 | 1.88 | 68 |
| 10 | 09/05/2025 | 23:02:42 | -70.00, 10.77 | 116.51 | 09/05/2025 | 23:02:38 | -70.00, 10.72 | 116.52 | 2.07 | 4 |
| 11 | 09/05/2025 | 23:53:21 | 69.64, 178.62 | 63.13 | 09/05/2025 | 23:52:09 | 69.67, 177.91 | 63.18 | 27.55 | 72 |
| 12 | 09/08/2025 | 14:28:53 | 70.10, -40.92 | 64.58 | 09/08/2025 | 14:29:34 | 70.12, -40.85 | 64.59 | 3.34 | 41 |
| 13 | 09/08/2025 | 15:19:35 | -69.99, 126.56 | 115.52 | 09/08/2025 | 15:19:04 | -70.01, 126.63 | 115.51 | 3.45 | 31 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/27/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/27/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9