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: 10/23/2025
| 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 | -70.09, 10.85 | 98.27 | 10/23/2025 | 23:02:52 | -70.12, 10.85 | 98.24 | 3.57 | 58 |
| 2 | 10/23/2025 | 23:52:39 | 70.00, 178.30 | 81.65 | 10/23/2025 | 23:52:19 | 70.02, 178.35 | 81.67 | 3.04 | 20 |
| 3 | 10/24/2025 | 00:43:09 | -69.31, -13.37 | 99.02 | 10/24/2025 | 00:41:59 | -69.36, -14.93 | 98.99 | 61.16 | 70 |
| 4 | 10/26/2025 | 15:18:44 | -70.05, 126.70 | 97.39 | 10/26/2025 | 15:19:20 | -70.07, 126.66 | 97.38 | 2.19 | 36 |
| 5 | 10/26/2025 | 16:09:29 | 69.96, -65.86 | 82.54 | 10/26/2025 | 16:08:47 | 69.96, -65.85 | 82.53 | 0.72 | 42 |
| 6 | 10/29/2025 | 06:45:01 | 70.56, 74.38 | 84.01 | 10/29/2025 | 06:46:11 | 70.47, 75.50 | 83.92 | 42.97 | 70 |
| 7 | 10/29/2025 | 07:35:33 | -70.02,-117.46 | 96.52 | 10/29/2025 | 07:35:46 | -70.03,-117.50 | 96.52 | 1.53 | 13 |
| 8 | 10/29/2025 | 08:26:18 | 69.94, 49.97 | 83.41 | 10/29/2025 | 08:25:13 | 69.92, 49.99 | 83.39 | 2.69 | 65 |
| 9 | 10/31/2025 | 23:01:42 | 70.13,-169.15 | 84.45 | 10/31/2025 | 23:02:42 | 70.12,-169.12 | 84.43 | 1.67 | 60 |
| 10 | 10/31/2025 | 23:52:23 | -70.01, -1.64 | 95.67 | 10/31/2025 | 23:52:12 | -70.01, -1.63 | 95.67 | 0.60 | 11 |
| 11 | 11/01/2025 | 00:42:57 | 69.34, 166.64 | 83.69 | 11/01/2025 | 00:41:48 | 69.40, 165.17 | 83.73 | 57.77 | 69 |
| 12 | 11/03/2025 | 15:18:31 | 70.07, -53.26 | 85.23 | 11/03/2025 | 15:19:08 | 70.06, -53.30 | 85.22 | 2.01 | 37 |
| 13 | 11/03/2025 | 16:09:12 | -69.94, 114.25 | 94.89 | 11/03/2025 | 16:08:38 | -69.95, 114.19 | 94.88 | 2.55 | 34 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9