Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/22/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 10/23/2025 | 23:01:54 | -70.12, 10.81 | 98.25 | 10/23/2025 | 23:02:52 | -70.10, 10.82 | 98.26 | 1.66 | 58 |
| 2 | 10/23/2025 | 23:52:38 | 69.97, 178.34 | 81.62 | 10/23/2025 | 23:52:19 | 69.99, 178.31 | 81.65 | 2.96 | 19 |
| 3 | 10/24/2025 | 00:43:08 | -69.28, -13.33 | 99.05 | 10/24/2025 | 00:41:59 | -69.33, -14.96 | 99.01 | 64.21 | 69 |
| 4 | 10/26/2025 | 15:18:44 | -70.08, 126.67 | 97.37 | 10/26/2025 | 15:19:19 | -70.09, 126.70 | 97.35 | 2.42 | 35 |
| 5 | 10/26/2025 | 16:09:28 | 69.94, -65.81 | 82.51 | 10/26/2025 | 16:08:47 | 69.93, -65.89 | 82.50 | 2.86 | 41 |
| 6 | 10/29/2025 | 06:45:01 | 70.59, 74.34 | 84.04 | 10/29/2025 | 06:46:11 | 70.43, 75.45 | 83.88 | 44.64 | 70 |
| 7 | 10/29/2025 | 07:35:34 | -70.05,-117.50 | 96.50 | 10/29/2025 | 07:35:46 | -70.05,-117.47 | 96.50 | 1.12 | 12 |
| 8 | 10/29/2025 | 08:26:18 | 69.91, 50.01 | 83.38 | 10/29/2025 | 08:25:13 | 69.94, 50.02 | 83.41 | 2.75 | 65 |
| 9 | 10/31/2025 | 23:01:42 | 70.10,-169.10 | 84.42 | 10/31/2025 | 23:02:42 | 70.13,-169.10 | 84.45 | 3.13 | 60 |
| 10 | 10/31/2025 | 23:52:24 | -70.03, -1.68 | 95.65 | 10/31/2025 | 23:52:12 | -70.02, -1.61 | 95.65 | 2.50 | 12 |
| 11 | 11/01/2025 | 00:42:58 | 69.37, 166.61 | 83.71 | 11/01/2025 | 00:41:48 | 69.41, 165.19 | 83.74 | 55.57 | 70 |
| 12 | 11/03/2025 | 15:18:30 | 70.04, -53.22 | 85.21 | 11/03/2025 | 15:19:07 | 70.06, -53.30 | 85.22 | 3.28 | 37 |
| 13 | 11/03/2025 | 16:09:12 | -69.97, 114.21 | 94.86 | 11/03/2025 | 16:08:37 | -69.95, 114.19 | 94.88 | 1.63 | 35 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/22/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/22/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9