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: 10/10/2025
| 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 | 10/10/2025 | 14:28:36 | 70.65, -41.67 | 77.43 | 10/10/2025 | 14:29:45 | 70.58, -40.24 | 77.36 | 53.31 | 69 |
| 2 | 10/10/2025 | 15:19:07 | -70.02, 126.65 | 103.20 | 10/10/2025 | 15:19:23 | -70.03, 126.60 | 103.18 | 2.74 | 16 |
| 3 | 10/10/2025 | 16:09:52 | 69.92, -65.90 | 76.73 | 10/10/2025 | 16:08:50 | 69.93, -65.90 | 76.73 | 1.10 | 62 |
| 4 | 10/13/2025 | 06:45:17 | 70.09, 75.00 | 77.87 | 10/13/2025 | 06:46:24 | 70.10, 74.94 | 77.89 | 2.88 | 67 |
| 5 | 10/13/2025 | 07:35:58 | -69.98,-117.51 | 102.23 | 10/13/2025 | 07:35:54 | -70.00,-117.58 | 102.21 | 3.03 | 4 |
| 6 | 10/13/2025 | 08:26:37 | 69.57, 50.40 | 77.38 | 10/13/2025 | 08:25:26 | 69.61, 49.53 | 77.42 | 34.07 | 71 |
| 7 | 10/15/2025 | 23:02:08 | 70.07,-169.17 | 78.84 | 10/15/2025 | 23:02:54 | 70.09,-169.20 | 78.86 | 2.86 | 46 |
| 8 | 10/15/2025 | 23:52:50 | -70.01, -1.76 | 101.21 | 10/15/2025 | 23:52:24 | -69.98, -1.72 | 101.23 | 3.17 | 26 |
| 9 | 10/18/2025 | 15:18:59 | 70.05, -53.36 | 79.80 | 10/18/2025 | 15:19:24 | 70.05, -53.38 | 79.80 | 0.94 | 25 |
| 10 | 10/18/2025 | 16:09:40 | -69.94, 114.13 | 100.30 | 10/18/2025 | 16:08:54 | -69.95, 114.11 | 100.30 | 1.30 | 46 |
| 11 | 10/21/2025 | 06:45:10 | -70.44,-105.49 | 98.86 | 10/21/2025 | 06:46:21 | -70.37,-104.68 | 98.94 | 31.05 | 71 |
| 12 | 10/21/2025 | 07:35:49 | 70.04, 62.44 | 80.76 | 10/21/2025 | 07:35:52 | 70.03, 62.48 | 80.74 | 1.96 | 3 |
| 13 | 10/21/2025 | 08:26:30 | -69.93,-130.06 | 99.35 | 10/21/2025 | 08:25:22 | -69.93,-130.03 | 99.35 | 1.49 | 68 |
| 14 | 10/23/2025 | 23:01:55 | -70.12, 10.80 | 98.24 | 10/23/2025 | 23:02:54 | -70.11, 10.83 | 98.26 | 2.06 | 59 |
| 15 | 10/23/2025 | 23:52:39 | 69.99, 178.31 | 81.65 | 10/23/2025 | 23:52:21 | 69.99, 178.30 | 81.64 | 0.41 | 18 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/10/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/10/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9