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: 9/25/2025
| 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 | 06:45:35 | 70.07, 74.95 | 71.73 | 09/27/2025 | 06:46:19 | 70.05, 74.88 | 71.71 | 3.36 | 44 |
| 2 | 09/27/2025 | 07:36:17 | -70.01,-117.63 | 108.33 | 09/27/2025 | 07:35:48 | -69.99,-117.57 | 108.34 | 2.67 | 29 |
| 3 | 09/29/2025 | 22:12:00 | -71.06, 21.84 | 106.24 | 09/29/2025 | 22:13:06 | -70.96, 24.47 | 106.36 | 95.88 | 66 |
| 4 | 09/29/2025 | 23:02:27 | 70.03,-169.21 | 72.73 | 09/29/2025 | 23:02:48 | 70.04,-169.26 | 72.73 | 1.87 | 21 |
| 5 | 09/29/2025 | 23:53:08 | -69.91, -1.71 | 107.38 | 09/29/2025 | 23:52:18 | -69.93, -1.78 | 107.37 | 3.16 | 50 |
| 6 | 10/02/2025 | 14:28:37 | -70.24, 138.94 | 106.04 | 10/02/2025 | 14:29:48 | -70.20, 139.22 | 106.09 | 11.48 | 71 |
| 7 | 10/02/2025 | 15:19:19 | 70.00, -53.38 | 73.74 | 10/02/2025 | 15:19:17 | 69.98, -53.45 | 73.71 | 3.55 | 2 |
| 8 | 10/02/2025 | 16:10:00 | -69.89, 114.12 | 106.38 | 10/02/2025 | 16:08:47 | -69.87, 114.03 | 106.39 | 3.38 | 73 |
| 9 | 10/05/2025 | 06:45:27 | -70.12,-105.09 | 105.13 | 10/05/2025 | 06:46:17 | -70.11,-105.03 | 105.15 | 3.02 | 50 |
| 10 | 10/05/2025 | 07:36:11 | 69.99, 62.42 | 74.75 | 10/05/2025 | 07:35:44 | 69.99, 62.46 | 74.75 | 1.28 | 27 |
| 11 | 10/05/2025 | 08:26:36 | -69.02,-128.86 | 106.21 | 10/05/2025 | 08:25:29 | -69.06,-131.17 | 106.16 | 91.94 | 67 |
| 12 | 10/07/2025 | 22:11:53 | 71.08,-158.17 | 76.86 | 10/07/2025 | 22:12:58 | 71.00,-155.43 | 76.77 | 99.38 | 65 |
| 13 | 10/07/2025 | 23:02:17 | -70.07, 10.78 | 104.16 | 10/07/2025 | 23:02:43 | -70.08, 10.82 | 104.16 | 1.76 | 26 |
| 14 | 10/07/2025 | 23:53:01 | 69.93, 178.29 | 75.72 | 10/07/2025 | 23:52:10 | 69.96, 178.30 | 75.75 | 2.92 | 51 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/25/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/25/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9