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: 8/13/2025
| 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 | 08/15/2025 | 14:28:58 | -70.09, 139.08 | 123.79 | 08/15/2025 | 14:29:39 | -70.09, 139.06 | 123.79 | 0.71 | 41 |
| 2 | 08/15/2025 | 15:19:42 | 70.00, -53.48 | 56.14 | 08/15/2025 | 15:19:06 | 69.99, -53.44 | 56.13 | 2.36 | 36 |
| 3 | 08/18/2025 | 05:55:22 | 70.79, 86.42 | 57.80 | 08/18/2025 | 05:56:30 | 70.70, 88.21 | 57.64 | 66.41 | 68 |
| 4 | 08/18/2025 | 06:45:52 | -70.04,-105.07 | 122.99 | 08/18/2025 | 06:46:10 | -70.05,-105.12 | 122.98 | 2.21 | 18 |
| 5 | 08/18/2025 | 07:36:36 | 69.95, 62.37 | 56.94 | 08/18/2025 | 07:35:37 | 69.94, 62.38 | 56.93 | 1.41 | 59 |
| 6 | 08/20/2025 | 22:12:04 | 70.12,-156.73 | 57.96 | 08/20/2025 | 22:13:10 | 70.15,-156.73 | 57.98 | 3.63 | 66 |
| 7 | 08/20/2025 | 23:02:47 | -70.04, 10.69 | 122.11 | 08/20/2025 | 23:02:40 | -70.04, 10.75 | 122.12 | 2.23 | 7 |
| 8 | 08/20/2025 | 23:53:24 | 69.59, 178.68 | 57.44 | 08/20/2025 | 23:52:12 | 69.66, 177.86 | 57.53 | 32.33 | 72 |
| 9 | 08/23/2025 | 14:28:57 | 70.08, -40.90 | 58.81 | 08/23/2025 | 14:29:40 | 70.07, -40.96 | 58.80 | 2.63 | 43 |
| 10 | 08/23/2025 | 15:19:40 | -70.00, 126.53 | 121.26 | 08/23/2025 | 15:19:09 | -70.02, 126.60 | 121.24 | 3.19 | 31 |
| 11 | 08/26/2025 | 05:55:23 | -70.95, -93.84 | 119.36 | 08/26/2025 | 05:56:30 | -70.84, -91.57 | 119.55 | 83.54 | 67 |
| 12 | 08/26/2025 | 06:45:51 | 70.04, 74.93 | 59.69 | 08/26/2025 | 06:46:10 | 70.02, 74.86 | 59.67 | 3.35 | 19 |
| 13 | 08/26/2025 | 07:36:34 | -69.97,-117.64 | 120.38 | 08/26/2025 | 07:35:39 | -69.97,-117.58 | 120.36 | 2.74 | 55 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/13/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/13/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9