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: 4/7/2025
| 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 | 04/09/2025 | 14:28:14 | -70.19, 139.16 | 117.68 | 04/09/2025 | 14:29:26 | -70.18, 139.09 | 117.70 | 2.75 | 72 |
| 2 | 04/09/2025 | 15:18:58 | 70.11, -53.40 | 62.22 | 04/09/2025 | 15:18:53 | 70.08, -53.41 | 62.20 | 3.13 | 5 |
| 3 | 04/09/2025 | 16:09:37 | -69.83, 114.33 | 118.08 | 04/09/2025 | 16:08:24 | -69.91, 113.99 | 117.98 | 16.05 | 73 |
| 4 | 04/12/2025 | 06:45:05 | -70.18,-105.04 | 118.68 | 04/12/2025 | 06:45:57 | -70.17,-105.06 | 118.70 | 1.79 | 52 |
| 5 | 04/12/2025 | 07:35:48 | 70.05, 62.47 | 61.18 | 04/12/2025 | 07:35:24 | 70.06, 62.43 | 61.19 | 1.67 | 24 |
| 6 | 04/12/2025 | 08:26:15 | -69.14,-128.88 | 119.78 | 04/12/2025 | 08:25:08 | -69.18,-131.12 | 119.67 | 88.80 | 67 |
| 7 | 04/14/2025 | 23:01:54 | -70.14, 10.81 | 119.69 | 04/14/2025 | 23:02:27 | -70.15, 10.78 | 119.69 | 1.52 | 33 |
| 8 | 04/14/2025 | 23:52:38 | 70.07, 178.23 | 60.22 | 04/14/2025 | 23:51:54 | 70.04, 178.27 | 60.20 | 3.28 | 44 |
| 9 | 04/17/2025 | 14:28:11 | 70.71, -41.63 | 59.97 | 04/17/2025 | 14:29:21 | 70.61, -40.31 | 59.83 | 49.73 | 70 |
| 10 | 04/17/2025 | 15:18:44 | -70.11, 126.64 | 120.67 | 04/17/2025 | 15:18:58 | -70.12, 126.61 | 120.66 | 1.80 | 14 |
| 11 | 04/17/2025 | 16:09:27 | 69.99, -65.86 | 59.19 | 04/17/2025 | 16:08:25 | 70.01, -65.90 | 59.22 | 3.16 | 62 |
| 12 | 04/20/2025 | 06:44:51 | 70.18, 75.02 | 58.48 | 04/20/2025 | 06:45:59 | 70.19, 74.95 | 58.49 | 3.36 | 68 |
| 13 | 04/20/2025 | 07:35:34 | -70.10,-117.55 | 121.61 | 04/20/2025 | 07:35:29 | -70.10,-117.56 | 121.62 | 0.51 | 5 |
| 14 | 04/20/2025 | 08:26:12 | 69.71, 50.34 | 57.98 | 04/20/2025 | 08:25:00 | 69.76, 49.62 | 58.05 | 28.50 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/7/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/07/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9