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: 9/13/2025
| 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 | 09/13/2025 | 23:02:39 | 70.04,-169.26 | 66.54 | 09/13/2025 | 23:02:45 | 70.05,-169.23 | 66.56 | 2.38 | 6 |
| 2 | 09/13/2025 | 23:53:21 | -69.95, -1.81 | 113.54 | 09/13/2025 | 23:52:15 | -69.94, -1.76 | 113.55 | 2.28 | 66 |
| 3 | 09/16/2025 | 14:28:47 | -70.12, 139.08 | 112.37 | 09/16/2025 | 14:29:47 | -70.09, 139.06 | 112.40 | 2.69 | 60 |
| 4 | 09/16/2025 | 15:19:31 | 70.00, -53.43 | 67.53 | 09/16/2025 | 15:19:14 | 69.99, -53.43 | 67.52 | 0.83 | 17 |
| 5 | 09/16/2025 | 16:10:02 | -69.33, 114.87 | 113.14 | 09/16/2025 | 16:08:53 | -69.38, 113.37 | 113.07 | 59.13 | 69 |
| 6 | 09/19/2025 | 06:45:40 | -70.09,-105.10 | 111.36 | 09/19/2025 | 06:46:16 | -70.08,-105.08 | 111.38 | 1.56 | 36 |
| 7 | 09/19/2025 | 07:36:24 | 69.97, 62.39 | 68.53 | 09/19/2025 | 07:35:43 | 69.97, 62.42 | 68.54 | 1.13 | 41 |
| 8 | 09/21/2025 | 22:11:59 | 70.57,-157.39 | 70.16 | 09/21/2025 | 22:13:09 | 70.48,-156.24 | 70.05 | 43.99 | 70 |
| 9 | 09/21/2025 | 23:02:33 | -70.06, 10.72 | 110.35 | 09/21/2025 | 23:02:45 | -70.04, 10.76 | 110.37 | 2.90 | 12 |
| 10 | 09/21/2025 | 23:53:17 | 69.95, 178.21 | 69.55 | 09/21/2025 | 23:52:12 | 69.94, 178.26 | 69.54 | 2.13 | 65 |
| 11 | 09/24/2025 | 14:28:44 | 70.13, -40.92 | 70.75 | 09/24/2025 | 14:29:44 | 70.10, -40.90 | 70.71 | 3.20 | 60 |
| 12 | 09/24/2025 | 15:19:25 | -69.99, 126.61 | 109.38 | 09/24/2025 | 15:19:14 | -70.00, 126.58 | 109.38 | 1.03 | 11 |
| 13 | 09/24/2025 | 16:09:59 | 69.34, -65.13 | 69.97 | 09/24/2025 | 16:08:50 | 69.39, -66.61 | 70.03 | 58.22 | 69 |
| 14 | 09/27/2025 | 06:45:35 | 70.06, 74.97 | 71.72 | 09/27/2025 | 06:46:11 | 70.09, 74.97 | 71.74 | 3.11 | 36 |
| 15 | 09/27/2025 | 07:36:17 | -69.98,-117.59 | 108.36 | 09/27/2025 | 07:35:41 | -69.99,-117.54 | 108.35 | 1.94 | 36 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/13/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/13/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9