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: 7/20/2025
| 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 | 07/21/2025 | 06:20:30 | 70.09, 81.20 | 49.67 | 07/21/2025 | 06:21:11 | 70.09, 81.13 | 49.67 | 2.86 | 41 |
| 2 | 07/21/2025 | 07:11:12 | -69.99,-111.33 | 130.42 | 07/21/2025 | 07:10:41 | -69.98,-111.39 | 130.43 | 2.90 | 31 |
| 3 | 07/23/2025 | 21:46:54 | -70.88, 28.40 | 128.95 | 07/23/2025 | 21:48:02 | -70.78, 30.40 | 129.13 | 73.80 | 68 |
| 4 | 07/23/2025 | 22:37:25 | 70.10,-163.04 | 50.23 | 07/23/2025 | 22:37:40 | 70.08,-163.00 | 50.20 | 2.70 | 15 |
| 5 | 07/23/2025 | 23:28:07 | -69.99, 4.43 | 129.88 | 07/23/2025 | 23:27:10 | -69.97, 4.48 | 129.89 | 3.08 | 57 |
| 6 | 07/26/2025 | 14:03:36 | -70.15, 145.33 | 129.14 | 07/26/2025 | 14:04:43 | -70.17, 145.36 | 129.14 | 2.05 | 67 |
| 7 | 07/26/2025 | 14:54:20 | 70.06, -47.22 | 50.77 | 07/26/2025 | 14:54:10 | 70.06, -47.15 | 50.77 | 2.66 | 10 |
| 8 | 07/26/2025 | 15:44:56 | -69.63, 120.74 | 129.68 | 07/26/2025 | 15:43:44 | -69.73, 120.03 | 129.54 | 29.53 | 72 |
| 9 | 07/29/2025 | 06:20:31 | -70.11, -98.84 | 128.57 | 07/29/2025 | 06:21:13 | -70.14, -98.80 | 128.55 | 3.08 | 42 |
| 10 | 07/29/2025 | 07:11:14 | 69.97, 68.68 | 51.30 | 07/29/2025 | 07:10:41 | 69.97, 68.61 | 51.30 | 2.92 | 33 |
| 11 | 07/31/2025 | 21:46:56 | 70.83,-151.53 | 52.84 | 07/31/2025 | 21:48:04 | 70.68,-149.74 | 52.62 | 67.62 | 68 |
| 12 | 07/31/2025 | 22:37:26 | -70.08, 16.98 | 127.95 | 07/31/2025 | 22:37:43 | -70.09, 17.02 | 127.94 | 2.17 | 17 |
| 13 | 07/31/2025 | 23:28:10 | 69.99,-175.58 | 51.97 | 07/31/2025 | 23:27:10 | 69.97,-175.50 | 51.96 | 3.68 | 60 |
Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 7/20/2025
Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 07/20/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-8