Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-20 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/18/2025
| Index | Date (NOAA-20) | Time (NOAA-20) | Lat,Lon (NOAA-20) | SZA (NOAA-20 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 07/18/2025 | 14:53:15 | 70.05, -47.21 | 49.15 | 07/18/2025 | 14:54:06 | 70.03, -47.18 | 49.12 | 2.45 | 51 |
| 2 | 07/18/2025 | 15:43:56 | -69.93, 120.29 | 130.97 | 07/18/2025 | 15:43:36 | -69.92, 120.30 | 130.98 | 1.04 | 20 |
| 3 | 07/18/2025 | 16:34:24 | 68.94, -70.98 | 48.00 | 07/18/2025 | 16:33:18 | 68.99, -73.30 | 48.15 | 93.06 | 66 |
| 4 | 07/21/2025 | 07:10:10 | 70.02, 68.61 | 49.62 | 07/21/2025 | 07:10:37 | 70.01, 68.67 | 49.60 | 2.35 | 27 |
| 5 | 07/21/2025 | 08:00:51 | -69.89,-123.88 | 130.51 | 07/21/2025 | 08:00:07 | -69.90,-123.84 | 130.50 | 1.69 | 44 |
| 6 | 07/23/2025 | 22:36:26 | -70.38, 16.51 | 129.46 | 07/23/2025 | 22:37:37 | -70.30, 17.32 | 129.59 | 31.71 | 71 |
| 7 | 07/23/2025 | 23:27:05 | 69.99,-175.57 | 50.13 | 07/23/2025 | 23:27:08 | 69.97,-175.50 | 50.11 | 3.10 | 3 |
| 8 | 07/24/2025 | 00:17:46 | -69.86, -8.06 | 130.00 | 07/24/2025 | 00:16:38 | -69.87, -8.01 | 129.98 | 1.95 | 68 |
| 9 | 07/26/2025 | 14:53:15 | -70.04, 132.82 | 129.25 | 07/26/2025 | 14:54:12 | -70.03, 132.82 | 129.26 | 0.48 | 57 |
| 10 | 07/26/2025 | 15:43:59 | 69.91, -59.68 | 50.63 | 07/26/2025 | 15:43:39 | 69.92, -59.70 | 50.64 | 1.37 | 20 |
| 11 | 07/26/2025 | 16:34:29 | -69.20, 108.68 | 130.11 | 07/26/2025 | 16:33:20 | -69.21, 106.98 | 130.02 | 66.94 | 69 |
| 12 | 07/29/2025 | 07:10:09 | -70.01,-111.37 | 128.66 | 07/29/2025 | 07:10:41 | -70.02,-111.31 | 128.65 | 2.61 | 32 |
| 13 | 07/29/2025 | 08:00:53 | 69.88, 56.13 | 51.22 | 07/29/2025 | 08:00:08 | 69.91, 56.17 | 51.25 | 2.78 | 45 |
| 14 | 07/31/2025 | 22:36:27 | 70.34,-163.41 | 52.34 | 07/31/2025 | 22:37:38 | 70.26,-162.72 | 52.22 | 27.23 | 71 |
| 15 | 07/31/2025 | 23:27:03 | -69.93, 4.52 | 128.08 | 07/31/2025 | 23:27:12 | -69.95, 4.46 | 128.07 | 2.70 | 9 |
| 16 | 08/01/2025 | 00:17:47 | 69.81, 172.01 | 51.80 | 08/01/2025 | 00:16:39 | 69.83, 171.94 | 51.83 | 3.22 | 68 |
Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/18/2025
Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 07/18/2025 in txt file.
Historial Predications of SNOs between NOAA-20 and LANDSAT-9