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: 4/15/2025
| 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 | 04/16/2025 | 06:19:38 | 70.27, 81.18 | 59.99 | 04/16/2025 | 06:20:48 | 70.25, 81.26 | 59.96 | 3.46 | 70 |
| 2 | 04/16/2025 | 07:10:20 | -70.15,-111.32 | 120.15 | 04/16/2025 | 07:10:18 | -70.14,-111.28 | 120.17 | 2.58 | 2 |
| 3 | 04/16/2025 | 08:01:00 | 69.86, 56.43 | 59.53 | 04/16/2025 | 07:59:47 | 69.92, 56.07 | 59.61 | 15.73 | 73 |
| 4 | 04/18/2025 | 22:36:27 | 70.19,-162.91 | 58.96 | 04/18/2025 | 22:37:15 | 70.22,-162.91 | 58.98 | 2.88 | 48 |
| 5 | 04/18/2025 | 23:27:10 | -70.13, 4.51 | 121.12 | 04/18/2025 | 23:26:45 | -70.11, 4.56 | 121.15 | 3.16 | 25 |
| 6 | 04/21/2025 | 14:53:16 | 70.18, -47.10 | 58.03 | 04/21/2025 | 14:53:40 | 70.20, -47.05 | 58.04 | 2.48 | 24 |
| 7 | 04/21/2025 | 15:43:58 | -70.06, 120.40 | 122.11 | 04/21/2025 | 15:43:10 | -70.08, 120.42 | 122.08 | 2.85 | 48 |
| 8 | 04/24/2025 | 06:19:25 | -70.41, -98.98 | 122.62 | 04/24/2025 | 06:20:37 | -70.35, -98.59 | 122.70 | 16.31 | 72 |
| 9 | 04/24/2025 | 07:10:05 | 70.13, 68.77 | 57.08 | 04/24/2025 | 07:10:06 | 70.13, 68.74 | 57.08 | 1.26 | 1 |
| 10 | 04/24/2025 | 08:00:47 | -70.00,-123.72 | 123.06 | 04/24/2025 | 07:59:36 | -70.02,-123.78 | 123.04 | 2.75 | 71 |
| 11 | 04/26/2025 | 22:36:11 | -70.21, 17.12 | 123.69 | 04/26/2025 | 22:37:04 | -70.19, 17.07 | 123.72 | 3.36 | 53 |
| 12 | 04/26/2025 | 23:26:54 | 70.08,-175.37 | 56.17 | 04/26/2025 | 23:26:31 | 70.07,-175.44 | 56.16 | 3.15 | 23 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 4/15/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 04/15/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8