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: 10/16/2025
| 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 | 10/18/2025 | 15:18:58 | 70.03, -53.33 | 79.79 | 10/18/2025 | 15:19:23 | 70.04, -53.40 | 79.79 | 2.42 | 25 |
| 2 | 10/18/2025 | 16:09:39 | -69.93, 114.15 | 100.31 | 10/18/2025 | 16:08:53 | -69.93, 114.08 | 100.31 | 2.44 | 46 |
| 3 | 10/21/2025 | 06:45:10 | -70.43,-105.47 | 98.87 | 10/21/2025 | 06:46:21 | -70.33,-104.74 | 98.98 | 29.83 | 71 |
| 4 | 10/21/2025 | 07:35:49 | 70.03, 62.46 | 80.74 | 10/21/2025 | 07:35:51 | 70.05, 62.51 | 80.76 | 3.07 | 2 |
| 5 | 10/21/2025 | 08:26:30 | -69.92,-130.05 | 99.36 | 10/21/2025 | 08:25:21 | -69.95,-130.01 | 99.34 | 3.31 | 69 |
| 6 | 10/23/2025 | 23:01:55 | -70.12, 10.81 | 98.24 | 10/23/2025 | 23:02:53 | -70.09, 10.80 | 98.28 | 3.47 | 58 |
| 7 | 10/23/2025 | 23:52:39 | 69.98, 178.33 | 81.64 | 10/23/2025 | 23:52:20 | 69.97, 178.29 | 81.63 | 1.61 | 19 |
| 8 | 10/24/2025 | 00:43:09 | -69.29, -13.34 | 99.05 | 10/24/2025 | 00:42:00 | -69.32, -14.97 | 99.02 | 64.38 | 69 |
| 9 | 10/26/2025 | 15:18:44 | -70.08, 126.66 | 97.37 | 10/26/2025 | 15:19:19 | -70.09, 126.69 | 97.35 | 1.80 | 35 |
| 10 | 10/26/2025 | 16:09:28 | 69.94, -65.83 | 82.52 | 10/26/2025 | 16:08:46 | 69.97, -65.83 | 82.55 | 3.32 | 42 |
| 11 | 10/29/2025 | 06:45:01 | 70.59, 74.33 | 84.04 | 10/29/2025 | 06:46:11 | 70.43, 75.45 | 83.88 | 44.88 | 70 |
| 12 | 10/29/2025 | 07:35:34 | -70.04,-117.49 | 96.50 | 10/29/2025 | 07:35:46 | -70.05,-117.46 | 96.49 | 1.73 | 12 |
| 13 | 10/29/2025 | 08:26:18 | 69.91, 50.01 | 83.39 | 10/29/2025 | 08:25:13 | 69.94, 50.02 | 83.40 | 2.37 | 65 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/16/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/16/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9