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: 4/1/2025
| 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 | 04/01/2025 | 14:28:25 | 70.17, -40.86 | 65.35 | 04/01/2025 | 14:29:20 | 70.18, -40.87 | 65.34 | 0.61 | 55 |
| 2 | 04/01/2025 | 15:19:07 | -70.07, 126.63 | 114.78 | 04/01/2025 | 15:18:50 | -70.06, 126.60 | 114.78 | 1.26 | 17 |
| 3 | 04/01/2025 | 16:09:37 | 69.23, -64.84 | 64.34 | 04/01/2025 | 16:08:29 | 69.29, -66.81 | 64.47 | 77.72 | 68 |
| 4 | 04/04/2025 | 06:45:16 | 70.13, 75.00 | 64.27 | 04/04/2025 | 06:45:47 | 70.12, 74.94 | 64.26 | 2.19 | 31 |
| 5 | 04/04/2025 | 07:35:58 | -70.01,-117.51 | 115.87 | 04/04/2025 | 07:35:17 | -70.01,-117.59 | 115.86 | 2.82 | 41 |
| 6 | 04/06/2025 | 22:11:30 | -70.54, 22.82 | 116.31 | 04/06/2025 | 22:12:41 | -70.47, 23.68 | 116.42 | 33.11 | 71 |
| 7 | 04/06/2025 | 23:02:07 | 70.10,-169.17 | 63.22 | 04/06/2025 | 23:02:13 | 70.08,-169.23 | 63.21 | 2.55 | 6 |
| 8 | 04/06/2025 | 23:52:50 | -70.03, -1.75 | 116.87 | 04/06/2025 | 23:51:42 | -70.03, -1.67 | 116.87 | 2.98 | 68 |
| 9 | 04/09/2025 | 14:28:14 | -70.15, 139.22 | 117.72 | 04/09/2025 | 14:29:11 | -70.17, 139.14 | 117.71 | 3.68 | 57 |
| 10 | 04/09/2025 | 15:18:58 | 70.07, -53.35 | 62.19 | 04/09/2025 | 15:18:38 | 70.05, -53.37 | 62.17 | 2.26 | 20 |
| 11 | 04/09/2025 | 16:09:28 | -69.31, 115.08 | 118.61 | 04/09/2025 | 16:08:19 | -69.34, 113.28 | 118.53 | 70.56 | 69 |
| 12 | 04/12/2025 | 06:45:04 | -70.14,-104.97 | 118.72 | 04/12/2025 | 06:45:34 | -70.15,-104.98 | 118.71 | 2.00 | 30 |
| 13 | 04/12/2025 | 07:35:47 | 70.01, 62.53 | 61.14 | 04/12/2025 | 07:35:01 | 70.04, 62.50 | 61.17 | 3.07 | 46 |
| 14 | 04/14/2025 | 22:11:15 | 70.37,-156.87 | 60.57 | 04/14/2025 | 22:12:26 | 70.31,-156.49 | 60.49 | 15.92 | 71 |
| 15 | 04/14/2025 | 23:01:54 | -70.08, 10.89 | 119.75 | 04/14/2025 | 23:01:58 | -70.10, 10.84 | 119.74 | 2.58 | 4 |
| 16 | 04/14/2025 | 23:52:37 | 69.96, 178.39 | 60.12 | 04/14/2025 | 23:51:25 | 69.98, 178.31 | 60.14 | 3.28 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/1/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/01/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9