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: 7/17/2025
| 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 | 07/18/2025 | 14:03:35 | 70.15, -34.66 | 49.24 | 07/18/2025 | 14:04:39 | 70.17, -34.63 | 49.25 | 2.73 | 64 |
| 2 | 07/18/2025 | 14:54:17 | -70.06, 132.80 | 130.86 | 07/18/2025 | 14:54:09 | -70.06, 132.85 | 130.85 | 1.87 | 8 |
| 3 | 07/18/2025 | 15:44:53 | 69.52, -59.09 | 48.59 | 07/18/2025 | 15:43:43 | 69.57, -60.19 | 48.69 | 43.02 | 70 |
| 4 | 07/21/2025 | 06:20:30 | 70.10, 81.18 | 49.69 | 07/21/2025 | 06:21:10 | 70.12, 81.18 | 49.70 | 2.33 | 40 |
| 5 | 07/21/2025 | 07:11:12 | -70.00,-111.35 | 130.41 | 07/21/2025 | 07:10:40 | -70.02,-111.33 | 130.39 | 1.82 | 32 |
| 6 | 07/23/2025 | 21:46:55 | -70.89, 28.38 | 128.94 | 07/23/2025 | 21:48:03 | -70.77, 30.38 | 129.15 | 74.44 | 68 |
| 7 | 07/23/2025 | 22:37:25 | 70.06,-162.99 | 50.19 | 07/23/2025 | 22:37:41 | 70.06,-163.02 | 50.19 | 1.19 | 16 |
| 8 | 07/23/2025 | 23:28:07 | -69.95, 4.49 | 129.92 | 07/23/2025 | 23:27:11 | -69.96, 4.47 | 129.90 | 1.15 | 56 |
| 9 | 07/26/2025 | 14:03:36 | -70.17, 145.30 | 129.13 | 07/26/2025 | 14:04:43 | -70.16, 145.35 | 129.15 | 2.08 | 67 |
| 10 | 07/26/2025 | 14:54:19 | 70.02, -47.16 | 50.73 | 07/26/2025 | 14:54:10 | 70.04, -47.17 | 50.75 | 2.17 | 9 |
| 11 | 07/26/2025 | 15:44:56 | -69.65, 120.72 | 129.66 | 07/26/2025 | 15:43:44 | -69.72, 120.02 | 129.55 | 28.29 | 72 |
| 12 | 07/29/2025 | 06:20:31 | -70.13, -98.87 | 128.55 | 07/29/2025 | 06:21:13 | -70.13, -98.81 | 128.56 | 2.05 | 42 |
| 13 | 07/29/2025 | 07:11:14 | 69.99, 68.65 | 51.32 | 07/29/2025 | 07:10:40 | 70.01, 68.67 | 51.34 | 2.25 | 34 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 7/17/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 07/17/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8