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: 9/25/2025
| 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 | 09/25/2025 | 22:37:10 | 70.13,-163.02 | 71.26 | 09/25/2025 | 22:38:01 | 70.13,-162.96 | 71.27 | 2.62 | 51 |
| 2 | 09/25/2025 | 23:27:51 | -70.00, 4.48 | 108.85 | 09/25/2025 | 23:27:31 | -70.02, 4.51 | 108.84 | 1.84 | 20 |
| 3 | 09/26/2025 | 00:18:20 | 69.07, 173.14 | 70.22 | 09/26/2025 | 00:17:13 | 69.09, 170.90 | 70.26 | 88.99 | 67 |
| 4 | 09/28/2025 | 14:54:02 | 70.08, -47.17 | 72.26 | 09/28/2025 | 14:54:30 | 70.10, -47.12 | 72.27 | 2.87 | 28 |
| 5 | 09/28/2025 | 15:44:43 | -69.96, 120.33 | 107.86 | 09/28/2025 | 15:44:00 | -69.99, 120.35 | 107.83 | 3.14 | 43 |
| 6 | 10/01/2025 | 06:20:15 | -70.49, -99.34 | 106.30 | 10/01/2025 | 06:21:26 | -70.40, -98.44 | 106.40 | 35.11 | 71 |
| 7 | 10/01/2025 | 07:10:53 | 70.04, 68.67 | 73.26 | 10/01/2025 | 07:10:58 | 70.02, 68.66 | 73.24 | 2.23 | 5 |
| 8 | 10/01/2025 | 08:01:34 | -69.92,-123.83 | 106.85 | 10/01/2025 | 08:00:28 | -69.91,-123.86 | 106.86 | 1.59 | 66 |
| 9 | 10/03/2025 | 22:37:00 | -70.10, 17.05 | 105.66 | 10/03/2025 | 22:37:58 | -70.13, 17.06 | 105.64 | 2.90 | 58 |
| 10 | 10/03/2025 | 23:27:45 | 70.02,-175.52 | 74.27 | 10/03/2025 | 23:27:25 | 70.02,-175.46 | 74.27 | 2.37 | 20 |
| 11 | 10/04/2025 | 00:18:15 | -69.32, -7.17 | 106.43 | 10/04/2025 | 00:17:05 | -69.36, -8.72 | 106.38 | 61.22 | 70 |
| 12 | 10/06/2025 | 14:53:52 | -70.09, 132.85 | 104.65 | 10/06/2025 | 14:54:25 | -70.09, 132.89 | 104.65 | 1.66 | 33 |
| 13 | 10/06/2025 | 15:44:36 | 69.96, -59.64 | 75.24 | 10/06/2025 | 15:43:52 | 69.98, -59.62 | 75.25 | 1.75 | 44 |
| 14 | 10/09/2025 | 06:20:07 | 70.43, 80.79 | 76.70 | 10/09/2025 | 06:21:18 | 70.33, 81.50 | 76.60 | 28.64 | 71 |
| 15 | 10/09/2025 | 07:10:43 | -70.04,-111.29 | 103.68 | 10/09/2025 | 07:10:51 | -70.06,-111.25 | 103.66 | 2.51 | 8 |
| 16 | 10/09/2025 | 08:01:27 | 69.91, 56.22 | 76.21 | 10/09/2025 | 08:00:19 | 69.89, 56.15 | 76.19 | 3.37 | 68 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 9/25/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 09/25/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8