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: 9/30/2025
| 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 | 10/02/2025 | 14:28:37 | -70.24, 138.94 | 106.04 | 10/02/2025 | 14:29:48 | -70.20, 139.22 | 106.08 | 11.32 | 71 |
| 2 | 10/02/2025 | 15:19:19 | 70.00, -53.38 | 73.73 | 10/02/2025 | 15:19:17 | 69.99, -53.44 | 73.72 | 2.45 | 2 |
| 3 | 10/02/2025 | 16:10:00 | -69.88, 114.12 | 106.38 | 10/02/2025 | 16:08:47 | -69.88, 114.04 | 106.38 | 3.11 | 73 |
| 4 | 10/05/2025 | 06:45:27 | -70.12,-105.09 | 105.13 | 10/05/2025 | 06:46:17 | -70.11,-105.02 | 105.14 | 2.62 | 50 |
| 5 | 10/05/2025 | 07:36:10 | 69.98, 62.43 | 74.75 | 10/05/2025 | 07:35:43 | 70.01, 62.47 | 74.77 | 2.93 | 27 |
| 6 | 10/05/2025 | 08:26:35 | -69.02,-128.86 | 106.21 | 10/05/2025 | 08:25:28 | -69.07,-131.16 | 106.15 | 91.75 | 67 |
| 7 | 10/07/2025 | 22:11:53 | 71.07,-158.16 | 76.85 | 10/07/2025 | 22:12:59 | 70.96,-155.49 | 76.73 | 97.28 | 66 |
| 8 | 10/07/2025 | 23:02:17 | -70.06, 10.79 | 104.16 | 10/07/2025 | 23:02:43 | -70.09, 10.84 | 104.14 | 3.34 | 26 |
| 9 | 10/07/2025 | 23:53:01 | 69.93, 178.30 | 75.72 | 10/07/2025 | 23:52:11 | 69.92, 178.25 | 75.71 | 2.09 | 50 |
| 10 | 10/10/2025 | 14:28:28 | 70.19, -40.94 | 76.97 | 10/10/2025 | 14:29:39 | 70.18, -40.76 | 76.96 | 6.72 | 71 |
| 11 | 10/10/2025 | 15:19:08 | -70.02, 126.64 | 103.19 | 10/10/2025 | 15:19:10 | -70.02, 126.64 | 103.19 | 0.43 | 2 |
| 12 | 10/10/2025 | 16:09:51 | 69.83, -65.77 | 76.63 | 10/10/2025 | 16:08:38 | 69.85, -65.95 | 76.66 | 7.54 | 73 |
| 13 | 10/13/2025 | 06:45:18 | 70.11, 74.98 | 77.89 | 10/13/2025 | 06:46:06 | 70.08, 74.98 | 77.86 | 3.46 | 48 |
| 14 | 10/13/2025 | 07:35:59 | -69.99,-117.52 | 102.22 | 10/13/2025 | 07:35:36 | -69.97,-117.53 | 102.24 | 1.80 | 23 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/30/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/30/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9