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: 10/11/2025
| 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 | 10/11/2025 | 22:36:52 | 70.13,-162.95 | 77.41 | 10/11/2025 | 22:38:03 | 70.13,-162.97 | 77.41 | 0.69 | 71 |
| 2 | 10/11/2025 | 23:27:33 | -70.02, 4.53 | 102.69 | 10/11/2025 | 23:27:33 | -70.02, 4.50 | 102.69 | 1.21 | 0 |
| 3 | 10/12/2025 | 00:18:15 | 69.77, 172.22 | 77.08 | 10/12/2025 | 00:17:02 | 69.81, 171.85 | 77.11 | 14.65 | 73 |
| 4 | 10/14/2025 | 14:53:43 | 70.10, -47.12 | 78.38 | 10/14/2025 | 14:54:33 | 70.08, -47.16 | 78.36 | 2.50 | 50 |
| 5 | 10/14/2025 | 15:44:24 | -69.99, 120.36 | 101.72 | 10/14/2025 | 15:44:03 | -69.97, 120.32 | 101.74 | 3.01 | 21 |
| 6 | 10/14/2025 | 16:34:51 | 68.94, -70.81 | 77.25 | 10/14/2025 | 16:33:45 | 69.04, -73.29 | 77.34 | 99.38 | 66 |
| 7 | 10/17/2025 | 07:10:34 | 70.08, 68.70 | 79.35 | 10/17/2025 | 07:11:02 | 70.06, 68.69 | 79.33 | 2.25 | 28 |
| 8 | 10/17/2025 | 08:01:15 | -69.97,-123.81 | 100.76 | 10/17/2025 | 08:00:32 | -69.95,-123.82 | 100.78 | 2.09 | 43 |
| 9 | 10/19/2025 | 22:36:47 | -70.58, 16.40 | 99.20 | 10/19/2025 | 22:37:57 | -70.45, 17.50 | 99.33 | 42.99 | 70 |
| 10 | 10/19/2025 | 23:27:23 | 70.02,-175.41 | 80.25 | 10/19/2025 | 23:27:30 | 70.01,-175.49 | 80.25 | 2.88 | 7 |
| 11 | 10/20/2025 | 00:18:05 | -69.96, -8.00 | 99.80 | 10/20/2025 | 00:16:59 | -69.96, -7.93 | 99.80 | 3.00 | 66 |
| 12 | 10/22/2025 | 14:53:29 | -70.10, 132.95 | 98.73 | 10/22/2025 | 14:54:31 | -70.11, 132.89 | 98.73 | 2.43 | 62 |
| 13 | 10/22/2025 | 15:44:14 | 70.01, -59.62 | 81.20 | 10/22/2025 | 15:43:58 | 69.99, -59.63 | 81.18 | 2.53 | 16 |
| 14 | 10/22/2025 | 16:34:46 | -69.42, 108.57 | 99.38 | 10/22/2025 | 16:33:36 | -69.45, 107.26 | 99.36 | 51.45 | 70 |
| 15 | 10/25/2025 | 07:10:20 | -70.10,-111.27 | 97.80 | 10/25/2025 | 07:10:58 | -70.12,-111.21 | 97.78 | 2.94 | 38 |
| 16 | 10/25/2025 | 08:01:04 | 69.97, 56.24 | 82.09 | 10/25/2025 | 08:00:26 | 69.95, 56.19 | 82.06 | 3.11 | 38 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/11/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/11/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8