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: 9/14/2025
| 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 | 09/16/2025 | 14:28:47 | -70.09, 139.12 | 112.39 | 09/16/2025 | 14:29:47 | -70.12, 139.10 | 112.37 | 2.90 | 60 |
| 2 | 09/16/2025 | 15:19:32 | 70.03, -53.48 | 67.56 | 09/16/2025 | 15:19:14 | 70.02, -53.40 | 67.55 | 3.15 | 18 |
| 3 | 09/16/2025 | 16:10:03 | -69.36, 114.83 | 113.11 | 09/16/2025 | 16:08:53 | -69.41, 113.40 | 113.04 | 56.08 | 70 |
| 4 | 09/19/2025 | 06:45:40 | -70.07,-105.06 | 111.39 | 09/19/2025 | 06:46:17 | -70.05,-105.12 | 111.41 | 3.02 | 37 |
| 5 | 09/19/2025 | 07:36:24 | 69.95, 62.43 | 68.51 | 09/19/2025 | 07:35:44 | 69.94, 62.38 | 68.51 | 1.92 | 40 |
| 6 | 09/21/2025 | 22:12:00 | 70.60,-157.44 | 70.19 | 09/21/2025 | 22:13:10 | 70.45,-156.28 | 70.02 | 46.05 | 70 |
| 7 | 09/21/2025 | 23:02:32 | -70.04, 10.75 | 110.37 | 09/21/2025 | 23:02:44 | -70.07, 10.80 | 110.35 | 3.32 | 12 |
| 8 | 09/21/2025 | 23:53:16 | 69.92, 178.24 | 69.52 | 09/21/2025 | 23:52:12 | 69.91, 178.21 | 69.51 | 2.24 | 64 |
| 9 | 09/24/2025 | 14:28:43 | 70.11, -40.88 | 70.72 | 09/24/2025 | 14:29:43 | 70.13, -40.87 | 70.74 | 2.08 | 60 |
| 10 | 09/24/2025 | 15:19:25 | -70.03, 126.56 | 109.35 | 09/24/2025 | 15:19:13 | -70.02, 126.62 | 109.36 | 2.21 | 12 |
| 11 | 09/24/2025 | 16:09:59 | 69.37, -65.17 | 70.01 | 09/24/2025 | 16:08:49 | 69.41, -66.58 | 70.06 | 55.06 | 70 |
| 12 | 09/27/2025 | 06:45:35 | 70.04, 75.00 | 71.70 | 09/27/2025 | 06:46:12 | 70.06, 74.92 | 71.71 | 3.32 | 37 |
| 13 | 09/27/2025 | 07:36:17 | -69.96,-117.56 | 108.38 | 09/27/2025 | 07:35:42 | -69.95,-117.59 | 108.38 | 1.17 | 35 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/14/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/14/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9