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: 10/18/2025
| 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 | 10/19/2025 | 23:26:29 | -70.07, 4.60 | 99.70 | 10/19/2025 | 23:27:38 | -70.07, 4.58 | 99.70 | 0.79 | 69 |
| 2 | 10/20/2025 | 00:17:13 | 69.94, 172.10 | 80.19 | 10/20/2025 | 00:17:05 | 69.96, 172.08 | 80.21 | 2.14 | 8 |
| 3 | 10/20/2025 | 01:07:51 | -69.64, -20.14 | 100.10 | 10/20/2025 | 01:06:38 | -69.69, -20.67 | 100.06 | 21.19 | 73 |
| 4 | 10/22/2025 | 15:43:30 | -70.00, 120.46 | 98.82 | 10/22/2025 | 15:44:07 | -70.02, 120.40 | 98.80 | 3.31 | 37 |
| 5 | 10/22/2025 | 16:34:15 | 69.92, -72.12 | 81.12 | 10/22/2025 | 16:33:34 | 69.91, -72.11 | 81.10 | 1.65 | 41 |
| 6 | 10/25/2025 | 07:09:53 | 70.23, 68.52 | 82.34 | 10/25/2025 | 07:11:04 | 70.15, 68.84 | 82.25 | 14.97 | 71 |
| 7 | 10/25/2025 | 08:00:32 | -69.98,-123.78 | 97.90 | 10/25/2025 | 08:00:35 | -69.99,-123.76 | 97.90 | 0.79 | 3 |
| 8 | 10/25/2025 | 08:51:15 | 69.80, 43.80 | 81.93 | 10/25/2025 | 08:50:03 | 69.82, 43.65 | 81.95 | 5.93 | 72 |
| 9 | 10/27/2025 | 23:26:51 | 70.02,-175.40 | 83.03 | 10/27/2025 | 23:27:33 | 70.03,-175.45 | 83.04 | 2.09 | 42 |
| 10 | 10/28/2025 | 00:17:33 | -69.93, -7.94 | 97.05 | 10/28/2025 | 00:17:03 | -69.92, -7.96 | 97.06 | 0.82 | 30 |
| 11 | 10/30/2025 | 14:53:16 | -70.57, 132.18 | 95.55 | 10/30/2025 | 14:54:26 | -70.43, 133.38 | 95.69 | 47.22 | 70 |
| 12 | 10/30/2025 | 15:43:51 | 69.97, -59.58 | 83.87 | 10/30/2025 | 15:43:59 | 69.98, -59.62 | 83.88 | 1.81 | 8 |
| 13 | 10/30/2025 | 16:34:33 | -69.88, 107.88 | 96.21 | 10/30/2025 | 16:33:29 | -69.88, 107.87 | 96.22 | 0.42 | 64 |
Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/18/2025
Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/18/2025 in txt file.
Historial Predications of SNOs between NOAA-20 and LANDSAT-9