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: 10/8/2025
| 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 | 10/09/2025 | 06:20:15 | 70.86, 80.09 | 77.14 | 10/09/2025 | 06:21:23 | 70.74, 82.06 | 77.02 | 73.15 | 68 |
| 2 | 10/09/2025 | 07:10:43 | -70.07,-111.33 | 103.65 | 10/09/2025 | 07:11:03 | -70.08,-111.28 | 103.64 | 2.53 | 20 |
| 3 | 10/09/2025 | 08:01:27 | 69.92, 56.20 | 76.22 | 10/09/2025 | 08:00:31 | 69.93, 56.15 | 76.22 | 2.20 | 56 |
| 4 | 10/11/2025 | 22:36:52 | 70.14,-162.97 | 77.42 | 10/11/2025 | 22:38:03 | 70.12,-162.99 | 77.40 | 2.79 | 71 |
| 5 | 10/11/2025 | 23:27:33 | -70.03, 4.52 | 102.68 | 10/11/2025 | 23:27:33 | -70.01, 4.49 | 102.70 | 2.88 | 0 |
| 6 | 10/12/2025 | 00:18:14 | 69.73, 172.28 | 77.03 | 10/12/2025 | 00:17:02 | 69.79, 171.83 | 77.10 | 18.61 | 72 |
| 7 | 10/14/2025 | 14:53:43 | 70.11, -47.14 | 78.39 | 10/14/2025 | 14:54:32 | 70.11, -47.11 | 78.39 | 1.00 | 49 |
| 8 | 10/14/2025 | 15:44:24 | -70.00, 120.35 | 101.71 | 10/14/2025 | 15:44:02 | -70.01, 120.37 | 101.71 | 1.04 | 22 |
| 9 | 10/14/2025 | 16:34:51 | 68.95, -70.83 | 77.26 | 10/14/2025 | 16:33:45 | 69.01, -73.32 | 77.32 | 99.61 | 66 |
| 10 | 10/17/2025 | 07:10:34 | 70.09, 68.68 | 79.36 | 10/17/2025 | 07:11:01 | 70.08, 68.73 | 79.34 | 2.04 | 27 |
| 11 | 10/17/2025 | 08:01:15 | -69.98,-123.82 | 100.75 | 10/17/2025 | 08:00:31 | -69.98,-123.79 | 100.75 | 1.34 | 44 |
| 12 | 10/19/2025 | 22:36:47 | -70.53, 16.48 | 99.25 | 10/19/2025 | 22:37:58 | -70.40, 17.44 | 99.38 | 38.16 | 71 |
| 13 | 10/19/2025 | 23:27:24 | 70.03,-175.43 | 80.26 | 10/19/2025 | 23:27:30 | 70.01,-175.48 | 80.25 | 2.37 | 6 |
| 14 | 10/20/2025 | 00:18:05 | -69.91, -7.93 | 99.85 | 10/20/2025 | 00:17:00 | -69.91, -7.99 | 99.85 | 2.25 | 65 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/8/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/08/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8