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: 9/28/2025
| 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 | 09/29/2025 | 22:12:00 | -71.07, 21.81 | 106.23 | 09/29/2025 | 22:13:06 | -70.95, 24.45 | 106.37 | 96.47 | 66 |
| 2 | 09/29/2025 | 23:02:27 | 70.04,-169.23 | 72.74 | 09/29/2025 | 23:02:48 | 70.03,-169.27 | 72.72 | 2.14 | 21 |
| 3 | 09/29/2025 | 23:53:08 | -69.93, -1.73 | 107.37 | 09/29/2025 | 23:52:18 | -69.92, -1.80 | 107.38 | 2.73 | 50 |
| 4 | 10/02/2025 | 14:28:36 | -70.21, 139.00 | 106.08 | 10/02/2025 | 14:29:48 | -70.19, 139.20 | 106.10 | 7.69 | 72 |
| 5 | 10/02/2025 | 15:19:19 | 70.02, -53.40 | 73.75 | 10/02/2025 | 15:19:16 | 70.03, -53.38 | 73.76 | 1.76 | 3 |
| 6 | 10/02/2025 | 16:10:00 | -69.90, 114.10 | 106.36 | 10/02/2025 | 16:08:46 | -69.92, 114.09 | 106.34 | 2.21 | 74 |
| 7 | 10/05/2025 | 06:45:26 | -70.08,-105.02 | 105.17 | 10/05/2025 | 06:46:17 | -70.09,-105.05 | 105.16 | 1.61 | 51 |
| 8 | 10/05/2025 | 07:36:11 | 70.00, 62.41 | 74.76 | 10/05/2025 | 07:35:44 | 69.99, 62.44 | 74.75 | 1.86 | 27 |
| 9 | 10/05/2025 | 08:26:36 | -69.03,-128.87 | 106.20 | 10/05/2025 | 08:25:29 | -69.05,-131.18 | 106.17 | 91.82 | 67 |
| 10 | 10/07/2025 | 22:11:54 | 71.09,-158.18 | 76.86 | 10/07/2025 | 22:12:59 | 70.99,-155.45 | 76.76 | 99.33 | 65 |
| 11 | 10/07/2025 | 23:02:18 | -70.08, 10.77 | 104.15 | 10/07/2025 | 23:02:44 | -70.07, 10.81 | 104.17 | 1.74 | 26 |
| 12 | 10/07/2025 | 23:53:02 | 69.94, 178.28 | 75.73 | 10/07/2025 | 23:52:11 | 69.95, 178.29 | 75.74 | 1.49 | 51 |
| 13 | 10/10/2025 | 14:28:28 | 70.20, -40.95 | 76.98 | 10/10/2025 | 14:29:39 | 70.15, -40.81 | 76.93 | 7.60 | 71 |
| 14 | 10/10/2025 | 15:19:08 | -70.03, 126.63 | 103.19 | 10/10/2025 | 15:19:09 | -70.05, 126.68 | 103.17 | 2.83 | 1 |
| 15 | 10/10/2025 | 16:09:50 | 69.79, -65.70 | 76.59 | 10/10/2025 | 16:08:38 | 69.82, -66.00 | 76.62 | 11.96 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/28/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/28/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9