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: 4/6/2025
| 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 | 04/06/2025 | 22:11:36 | -70.90, 22.24 | 115.93 | 04/06/2025 | 22:12:44 | -70.78, 24.11 | 116.11 | 69.45 | 68 |
| 2 | 04/06/2025 | 23:02:07 | 70.13,-169.22 | 63.25 | 04/06/2025 | 23:02:21 | 70.13,-169.20 | 63.25 | 0.82 | 14 |
| 3 | 04/06/2025 | 23:52:49 | -70.02, -1.73 | 116.88 | 04/06/2025 | 23:51:51 | -70.02, -1.72 | 116.87 | 1.00 | 58 |
| 4 | 04/09/2025 | 14:28:14 | -70.19, 139.15 | 117.67 | 04/09/2025 | 14:29:25 | -70.22, 139.14 | 117.66 | 2.62 | 71 |
| 5 | 04/09/2025 | 15:18:58 | 70.11, -53.41 | 62.23 | 04/09/2025 | 15:18:52 | 70.11, -53.36 | 62.23 | 1.89 | 6 |
| 6 | 04/09/2025 | 16:09:37 | -69.84, 114.32 | 118.07 | 04/09/2025 | 16:08:24 | -69.90, 113.97 | 118.00 | 15.06 | 73 |
| 7 | 04/12/2025 | 06:45:05 | -70.19,-105.05 | 118.67 | 04/12/2025 | 06:45:56 | -70.20,-105.02 | 118.67 | 1.46 | 51 |
| 8 | 04/12/2025 | 07:35:48 | 70.06, 62.46 | 61.19 | 04/12/2025 | 07:35:23 | 70.08, 62.47 | 61.21 | 2.75 | 25 |
| 9 | 04/12/2025 | 08:26:15 | -69.14,-128.89 | 119.78 | 04/12/2025 | 08:25:08 | -69.16,-131.16 | 119.69 | 89.72 | 67 |
| 10 | 04/14/2025 | 23:01:55 | -70.14, 10.80 | 119.69 | 04/14/2025 | 23:02:27 | -70.17, 10.81 | 119.67 | 2.62 | 32 |
| 11 | 04/14/2025 | 23:52:39 | 70.07, 178.23 | 60.23 | 04/14/2025 | 23:51:54 | 70.05, 178.29 | 60.21 | 3.18 | 45 |
| 12 | 04/17/2025 | 14:28:11 | 70.72, -41.63 | 59.98 | 04/17/2025 | 14:29:20 | 70.61, -40.30 | 59.83 | 50.25 | 69 |
| 13 | 04/17/2025 | 15:18:44 | -70.11, 126.64 | 120.67 | 04/17/2025 | 15:18:57 | -70.13, 126.63 | 120.65 | 2.29 | 13 |
| 14 | 04/17/2025 | 16:09:27 | 69.99, -65.86 | 59.20 | 04/17/2025 | 16:08:24 | 70.02, -65.89 | 59.23 | 3.05 | 63 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/6/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/06/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9