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: 9/22/2025
| 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 | 09/24/2025 | 14:28:43 | 70.11, -40.89 | 70.72 | 09/24/2025 | 14:29:49 | 70.10, -40.93 | 70.71 | 1.73 | 66 |
| 2 | 09/24/2025 | 15:19:24 | -69.98, 126.62 | 109.39 | 09/24/2025 | 15:19:19 | -69.99, 126.55 | 109.39 | 3.08 | 5 |
| 3 | 09/24/2025 | 16:10:02 | 69.53, -65.40 | 70.17 | 09/24/2025 | 16:08:51 | 69.61, -66.33 | 70.26 | 37.09 | 71 |
| 4 | 09/27/2025 | 06:45:36 | 70.10, 74.90 | 71.76 | 09/27/2025 | 06:46:19 | 70.09, 74.94 | 71.75 | 1.63 | 43 |
| 5 | 09/27/2025 | 07:36:17 | -69.98,-117.59 | 108.36 | 09/27/2025 | 07:35:49 | -69.98,-117.58 | 108.35 | 0.77 | 28 |
| 6 | 09/29/2025 | 22:12:01 | -71.07, 21.81 | 106.23 | 09/29/2025 | 22:13:07 | -70.98, 24.50 | 106.34 | 97.73 | 66 |
| 7 | 09/29/2025 | 23:02:28 | 70.05,-169.24 | 72.75 | 09/29/2025 | 23:02:49 | 70.06,-169.23 | 72.75 | 0.65 | 21 |
| 8 | 09/29/2025 | 23:53:09 | -69.93, -1.73 | 107.37 | 09/29/2025 | 23:52:19 | -69.95, -1.75 | 107.35 | 2.58 | 50 |
| 9 | 10/02/2025 | 14:28:37 | -70.25, 138.94 | 106.04 | 10/02/2025 | 14:29:49 | -70.21, 139.23 | 106.08 | 11.50 | 72 |
| 10 | 10/02/2025 | 15:19:19 | 70.01, -53.39 | 73.74 | 10/02/2025 | 15:19:18 | 69.99, -53.44 | 73.72 | 2.88 | 1 |
| 11 | 10/02/2025 | 16:10:00 | -69.89, 114.11 | 106.38 | 10/02/2025 | 16:08:48 | -69.89, 114.04 | 106.38 | 2.67 | 72 |
| 12 | 10/05/2025 | 06:45:27 | -70.11,-105.06 | 105.15 | 10/05/2025 | 06:46:19 | -70.12,-105.02 | 105.14 | 2.09 | 52 |
| 13 | 10/05/2025 | 07:36:11 | 69.97, 62.44 | 74.74 | 10/05/2025 | 07:35:46 | 70.00, 62.46 | 74.77 | 3.29 | 25 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/22/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/22/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9