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: 10/3/2025
| 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 | 10/05/2025 | 06:45:26 | -70.13,-105.10 | 105.12 | 10/05/2025 | 06:46:20 | -70.11,-105.04 | 105.15 | 3.26 | 54 |
| 2 | 10/05/2025 | 07:36:10 | 69.99, 62.43 | 74.75 | 10/05/2025 | 07:35:47 | 70.00, 62.46 | 74.77 | 2.29 | 23 |
| 3 | 10/05/2025 | 08:26:38 | -69.19,-129.09 | 106.04 | 10/05/2025 | 08:25:29 | -69.24,-130.95 | 105.99 | 73.80 | 69 |
| 4 | 10/07/2025 | 23:02:17 | -70.09, 10.76 | 104.14 | 10/07/2025 | 23:02:51 | -70.09, 10.81 | 104.14 | 2.15 | 34 |
| 5 | 10/07/2025 | 23:53:01 | 69.94, 178.28 | 75.73 | 10/07/2025 | 23:52:19 | 69.93, 178.23 | 75.71 | 2.65 | 42 |
| 6 | 10/10/2025 | 14:28:35 | 70.59, -41.57 | 77.38 | 10/10/2025 | 14:29:45 | 70.50, -40.34 | 77.28 | 46.77 | 70 |
| 7 | 10/10/2025 | 15:19:08 | -70.06, 126.59 | 103.15 | 10/10/2025 | 15:19:21 | -70.07, 126.66 | 103.14 | 3.23 | 13 |
| 8 | 10/10/2025 | 16:09:52 | 69.92, -65.89 | 76.72 | 10/10/2025 | 16:08:49 | 69.91, -65.92 | 76.71 | 1.85 | 63 |
| 9 | 10/13/2025 | 06:45:17 | 70.11, 74.98 | 77.89 | 10/13/2025 | 06:46:21 | 70.10, 74.95 | 77.88 | 1.56 | 64 |
| 10 | 10/13/2025 | 07:35:58 | -69.99,-117.53 | 102.21 | 10/13/2025 | 07:35:51 | -69.99,-117.56 | 102.22 | 1.30 | 7 |
| 11 | 10/13/2025 | 08:26:35 | 69.48, 50.53 | 77.29 | 10/13/2025 | 08:25:24 | 69.55, 49.47 | 77.36 | 42.03 | 71 |
| 12 | 10/15/2025 | 23:02:06 | 70.06,-169.16 | 78.84 | 10/15/2025 | 23:02:48 | 70.07,-169.19 | 78.85 | 1.83 | 42 |
| 13 | 10/15/2025 | 23:52:47 | -69.94, -1.66 | 101.27 | 10/15/2025 | 23:52:18 | -69.97, -1.70 | 101.25 | 3.30 | 29 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/3/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/03/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9