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: 9/24/2025
| 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 | 09/27/2025 | 06:45:36 | 70.09, 74.92 | 71.75 | 09/27/2025 | 06:46:19 | 70.09, 74.94 | 71.75 | 0.65 | 43 |
| 2 | 09/27/2025 | 07:36:17 | -69.97,-117.58 | 108.37 | 09/27/2025 | 07:35:49 | -69.98,-117.59 | 108.36 | 1.22 | 28 |
| 3 | 09/29/2025 | 22:12:00 | -71.07, 21.81 | 106.23 | 09/29/2025 | 22:13:06 | -70.95, 24.46 | 106.37 | 96.63 | 66 |
| 4 | 09/29/2025 | 23:02:27 | 70.05,-169.23 | 72.75 | 09/29/2025 | 23:02:48 | 70.03,-169.27 | 72.72 | 2.48 | 21 |
| 5 | 09/29/2025 | 23:53:08 | -69.93, -1.73 | 107.37 | 09/29/2025 | 23:52:18 | -69.92, -1.79 | 107.38 | 2.35 | 50 |
| 6 | 10/02/2025 | 14:28:37 | -70.26, 138.92 | 106.03 | 10/02/2025 | 14:29:48 | -70.20, 139.22 | 106.08 | 12.69 | 71 |
| 7 | 10/02/2025 | 15:19:19 | 70.02, -53.40 | 73.75 | 10/02/2025 | 15:19:16 | 70.04, -53.37 | 73.77 | 2.69 | 3 |
| 8 | 10/02/2025 | 16:10:00 | -69.90, 114.10 | 106.36 | 10/02/2025 | 16:08:47 | -69.88, 114.04 | 106.38 | 3.19 | 73 |
| 9 | 10/05/2025 | 06:45:26 | -70.08,-105.02 | 105.17 | 10/05/2025 | 06:46:18 | -70.07,-105.08 | 105.19 | 2.76 | 52 |
| 10 | 10/05/2025 | 07:36:11 | 70.00, 62.41 | 74.76 | 10/05/2025 | 07:35:44 | 70.01, 62.48 | 74.77 | 2.88 | 27 |
| 11 | 10/05/2025 | 08:26:36 | -69.03,-128.87 | 106.20 | 10/05/2025 | 08:25:29 | -69.08,-131.15 | 106.14 | 90.63 | 67 |
| 12 | 10/07/2025 | 22:11:54 | 71.09,-158.18 | 76.86 | 10/07/2025 | 22:13:00 | 70.98,-155.47 | 76.75 | 98.77 | 66 |
| 13 | 10/07/2025 | 23:02:18 | -70.07, 10.78 | 104.16 | 10/07/2025 | 23:02:45 | -70.06, 10.79 | 104.17 | 1.64 | 27 |
| 14 | 10/07/2025 | 23:53:02 | 69.94, 178.28 | 75.73 | 10/07/2025 | 23:52:12 | 69.94, 178.27 | 75.73 | 0.50 | 50 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/24/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/24/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9