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: 9/11/2025
| 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 | 09/12/2025 | 14:03:40 | -70.80, 144.34 | 113.20 | 09/12/2025 | 14:04:48 | -70.72, 146.16 | 113.32 | 67.37 | 68 |
| 2 | 09/12/2025 | 14:54:12 | 70.05, -47.18 | 66.05 | 09/12/2025 | 14:54:25 | 70.07, -47.14 | 66.06 | 2.54 | 13 |
| 3 | 09/12/2025 | 15:44:54 | -69.96, 120.28 | 114.04 | 09/12/2025 | 15:43:55 | -69.96, 120.33 | 114.04 | 2.10 | 59 |
| 4 | 09/15/2025 | 06:20:21 | -70.13, -98.83 | 112.87 | 09/15/2025 | 06:21:30 | -70.13, -98.83 | 112.87 | 0.29 | 69 |
| 5 | 09/15/2025 | 07:11:05 | 70.02, 68.66 | 67.03 | 09/15/2025 | 07:10:57 | 70.03, 68.67 | 67.04 | 1.41 | 8 |
| 6 | 09/15/2025 | 08:01:43 | -69.72,-123.58 | 113.27 | 09/15/2025 | 08:00:30 | -69.75,-124.08 | 113.22 | 20.00 | 73 |
| 7 | 09/17/2025 | 22:37:14 | -70.10, 17.00 | 111.87 | 09/17/2025 | 22:38:02 | -70.08, 16.97 | 111.89 | 2.08 | 48 |
| 8 | 09/17/2025 | 23:27:58 | 69.98,-175.52 | 68.03 | 09/17/2025 | 23:27:29 | 69.98,-175.54 | 68.02 | 1.06 | 29 |
| 9 | 09/20/2025 | 14:03:43 | 71.10, -36.16 | 70.19 | 09/20/2025 | 14:04:48 | 71.00, -33.41 | 70.05 | 99.93 | 65 |
| 10 | 09/20/2025 | 14:54:07 | -70.07, 132.82 | 110.86 | 09/20/2025 | 14:54:33 | -70.08, 132.84 | 110.86 | 1.37 | 26 |
| 11 | 09/20/2025 | 15:44:51 | 69.95, -59.69 | 69.04 | 09/20/2025 | 15:44:00 | 69.97, -59.67 | 69.05 | 2.17 | 51 |
| 12 | 09/23/2025 | 06:20:20 | 70.29, 80.94 | 70.39 | 09/23/2025 | 06:21:32 | 70.23, 81.29 | 70.32 | 15.02 | 72 |
| 13 | 09/23/2025 | 07:10:59 | -70.05,-111.36 | 109.85 | 09/23/2025 | 07:11:04 | -70.02,-111.37 | 109.88 | 3.46 | 5 |
| 14 | 09/23/2025 | 08:01:43 | 69.93, 56.12 | 70.05 | 09/23/2025 | 08:00:31 | 69.90, 56.11 | 70.02 | 2.84 | 72 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 9/11/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 09/11/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8