Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-8 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/15/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-8) | Time (LANDSAT-8) | Lat,Lon (LANDSAT-8) | SZA (LANDSAT-8 ) | Distance(km) | Time Diff (sec) |
| 1 | 09/17/2025 | 22:37:14 | -70.11, 16.99 | 111.86 | 09/17/2025 | 22:38:01 | -70.10, 17.00 | 111.87 | 0.53 | 47 |
| 2 | 09/17/2025 | 23:27:58 | 69.99,-175.52 | 68.03 | 09/17/2025 | 23:27:28 | 70.00,-175.50 | 68.05 | 1.82 | 30 |
| 3 | 09/20/2025 | 14:03:42 | 71.06, -36.08 | 70.14 | 09/20/2025 | 14:04:48 | 70.95, -33.50 | 69.99 | 94.30 | 66 |
| 4 | 09/20/2025 | 14:54:07 | -70.08, 132.81 | 110.85 | 09/20/2025 | 14:54:32 | -70.07, 132.83 | 110.87 | 1.47 | 25 |
| 5 | 09/20/2025 | 15:44:51 | 69.96, -59.70 | 69.04 | 09/20/2025 | 15:43:59 | 69.97, -59.67 | 69.05 | 1.29 | 52 |
| 6 | 09/23/2025 | 06:20:19 | 70.25, 81.01 | 70.35 | 09/23/2025 | 06:21:31 | 70.18, 81.24 | 70.27 | 11.26 | 72 |
| 7 | 09/23/2025 | 07:10:58 | -70.01,-111.31 | 109.89 | 09/23/2025 | 07:11:02 | -70.02,-111.36 | 109.88 | 2.55 | 4 |
| 8 | 09/23/2025 | 08:01:42 | 69.89, 56.19 | 70.01 | 09/23/2025 | 08:00:29 | 69.91, 56.13 | 70.03 | 3.64 | 73 |
| 9 | 09/25/2025 | 22:37:10 | 70.13,-163.03 | 71.27 | 09/25/2025 | 22:38:02 | 70.11,-162.98 | 71.25 | 2.27 | 52 |
| 10 | 09/25/2025 | 23:27:51 | -69.99, 4.50 | 108.86 | 09/25/2025 | 23:27:32 | -70.01, 4.50 | 108.85 | 1.68 | 19 |
| 11 | 09/26/2025 | 00:18:20 | 69.07, 173.14 | 70.23 | 09/26/2025 | 00:17:13 | 69.12, 170.95 | 70.30 | 87.03 | 67 |
| 12 | 09/28/2025 | 14:54:02 | 70.07, -47.15 | 72.24 | 09/28/2025 | 14:54:32 | 70.08, -47.15 | 72.26 | 1.77 | 30 |
| 13 | 09/28/2025 | 15:44:44 | -69.99, 120.29 | 107.83 | 09/28/2025 | 15:44:02 | -69.98, 120.34 | 107.84 | 2.13 | 42 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 9/15/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 09/15/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8