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: 9/8/2025
| 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 | 09/09/2025 | 22:37:20 | 70.10,-163.02 | 65.08 | 09/09/2025 | 22:37:55 | 70.10,-162.98 | 65.07 | 1.44 | 35 |
| 2 | 09/09/2025 | 23:28:01 | -70.00, 4.45 | 115.01 | 09/09/2025 | 23:27:24 | -69.98, 4.49 | 115.03 | 2.34 | 37 |
| 3 | 09/12/2025 | 14:03:39 | -70.74, 144.43 | 113.26 | 09/12/2025 | 14:04:48 | -70.61, 146.01 | 113.42 | 59.95 | 69 |
| 4 | 09/12/2025 | 14:54:12 | 70.06, -47.18 | 66.05 | 09/12/2025 | 14:54:23 | 70.07, -47.14 | 66.06 | 2.51 | 11 |
| 5 | 09/12/2025 | 15:44:54 | -69.96, 120.28 | 114.04 | 09/12/2025 | 15:43:53 | -69.96, 120.34 | 114.04 | 2.29 | 61 |
| 6 | 09/15/2025 | 06:20:21 | -70.13, -98.83 | 112.87 | 09/15/2025 | 06:21:25 | -70.13, -98.81 | 112.88 | 0.63 | 64 |
| 7 | 09/15/2025 | 07:11:05 | 70.02, 68.65 | 67.04 | 09/15/2025 | 07:10:52 | 70.02, 68.68 | 67.04 | 1.14 | 13 |
| 8 | 09/15/2025 | 08:01:39 | -69.51,-123.27 | 113.48 | 09/15/2025 | 08:00:28 | -69.58,-124.29 | 113.38 | 40.77 | 71 |
| 9 | 09/17/2025 | 22:37:14 | -70.11, 16.99 | 111.86 | 09/17/2025 | 22:37:53 | -70.11, 17.05 | 111.86 | 2.34 | 39 |
| 10 | 09/17/2025 | 23:27:58 | 69.99,-175.53 | 68.04 | 09/17/2025 | 23:27:20 | 70.00,-175.46 | 68.05 | 2.68 | 38 |
| 11 | 09/20/2025 | 14:03:35 | 70.70, -35.50 | 69.78 | 09/20/2025 | 14:04:44 | 70.56, -34.04 | 69.61 | 56.12 | 69 |
| 12 | 09/20/2025 | 14:54:06 | -70.03, 132.88 | 110.90 | 09/20/2025 | 14:54:21 | -70.07, 132.88 | 110.87 | 3.69 | 15 |
| 13 | 09/20/2025 | 15:44:49 | 69.92, -59.64 | 69.00 | 09/20/2025 | 15:43:47 | 69.95, -59.64 | 69.04 | 3.47 | 62 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 9/8/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 09/08/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8