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: 9/16/2025
| 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 | 22:37:13 | -70.08, 17.02 | 111.89 | 09/17/2025 | 22:38:01 | -70.07, 16.95 | 111.90 | 3.19 | 48 |
| 2 | 09/17/2025 | 23:27:57 | 69.96,-175.49 | 68.01 | 09/17/2025 | 23:27:28 | 69.97,-175.55 | 68.01 | 2.40 | 29 |
| 3 | 09/20/2025 | 14:03:41 | 71.03, -36.04 | 70.12 | 09/20/2025 | 14:04:47 | 70.97, -33.47 | 70.01 | 93.50 | 66 |
| 4 | 09/20/2025 | 14:54:06 | -70.06, 132.84 | 110.88 | 09/20/2025 | 14:54:32 | -70.04, 132.78 | 110.90 | 3.34 | 26 |
| 5 | 09/20/2025 | 15:44:50 | 69.94, -59.67 | 69.02 | 09/20/2025 | 15:43:59 | 69.93, -59.72 | 69.01 | 2.16 | 51 |
| 6 | 09/23/2025 | 06:20:20 | 70.27, 80.97 | 70.38 | 09/23/2025 | 06:21:31 | 70.20, 81.26 | 70.29 | 13.82 | 71 |
| 7 | 09/23/2025 | 07:10:59 | -70.04,-111.35 | 109.86 | 09/23/2025 | 07:11:02 | -70.04,-111.34 | 109.86 | 0.56 | 3 |
| 8 | 09/23/2025 | 08:01:42 | 69.86, 56.23 | 69.98 | 09/23/2025 | 08:00:30 | 69.88, 56.08 | 70.00 | 5.86 | 72 |
| 9 | 09/25/2025 | 22:37:10 | 70.10,-162.98 | 71.24 | 09/25/2025 | 22:38:02 | 70.13,-162.96 | 71.26 | 3.40 | 52 |
| 10 | 09/25/2025 | 23:27:52 | -70.02, 4.46 | 108.84 | 09/25/2025 | 23:27:32 | -70.02, 4.52 | 108.83 | 2.56 | 20 |
| 11 | 09/26/2025 | 00:18:20 | 69.04, 173.18 | 70.20 | 09/26/2025 | 00:17:13 | 69.14, 170.97 | 70.31 | 88.29 | 67 |
| 12 | 09/28/2025 | 14:54:02 | 70.09, -47.18 | 72.26 | 09/28/2025 | 14:54:31 | 70.09, -47.13 | 72.27 | 2.13 | 29 |
| 13 | 09/28/2025 | 15:44:43 | -69.96, 120.33 | 107.86 | 09/28/2025 | 15:44:02 | -69.94, 120.28 | 107.88 | 2.90 | 41 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 9/16/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 09/16/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8