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: 8/19/2025
| 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 | 08/20/2025 | 22:12:04 | 70.13,-156.75 | 57.97 | 08/20/2025 | 22:13:10 | 70.13,-156.75 | 57.97 | 0.30 | 66 |
| 2 | 08/20/2025 | 23:02:46 | -70.01, 10.74 | 122.14 | 08/20/2025 | 23:02:40 | -70.02, 10.72 | 122.14 | 1.29 | 6 |
| 3 | 08/20/2025 | 23:53:23 | 69.55, 178.73 | 57.40 | 08/20/2025 | 23:52:12 | 69.64, 177.84 | 57.52 | 36.00 | 71 |
| 4 | 08/23/2025 | 14:28:58 | 70.09, -40.92 | 58.83 | 08/23/2025 | 14:29:40 | 70.11, -40.90 | 58.84 | 2.31 | 42 |
| 5 | 08/23/2025 | 15:19:40 | -69.97, 126.58 | 121.29 | 08/23/2025 | 15:19:10 | -70.00, 126.57 | 121.26 | 3.34 | 30 |
| 6 | 08/26/2025 | 05:55:23 | -70.97, -93.87 | 119.35 | 08/26/2025 | 05:56:30 | -70.83, -91.60 | 119.56 | 84.17 | 67 |
| 7 | 08/26/2025 | 06:45:51 | 70.05, 74.91 | 59.70 | 08/26/2025 | 06:46:09 | 70.07, 74.92 | 59.72 | 1.99 | 18 |
| 8 | 08/26/2025 | 07:36:33 | -69.93,-117.59 | 120.41 | 08/26/2025 | 07:35:39 | -69.96,-117.60 | 120.38 | 3.48 | 54 |
| 9 | 08/28/2025 | 22:12:02 | -70.15, 23.22 | 119.27 | 08/28/2025 | 22:13:12 | -70.12, 23.23 | 119.31 | 3.47 | 70 |
| 10 | 08/28/2025 | 23:02:45 | 70.02,-169.26 | 60.61 | 08/28/2025 | 23:02:39 | 70.01,-169.27 | 60.60 | 0.72 | 6 |
| 11 | 08/28/2025 | 23:53:24 | -69.74, -1.53 | 119.68 | 08/28/2025 | 23:52:11 | -69.80, -1.94 | 119.60 | 17.36 | 73 |
| 12 | 08/31/2025 | 14:28:56 | -70.12, 139.04 | 118.35 | 08/31/2025 | 14:29:41 | -70.11, 139.10 | 118.37 | 2.87 | 45 |
| 13 | 08/31/2025 | 15:19:39 | 69.99, -53.44 | 61.53 | 08/31/2025 | 15:19:08 | 69.99, -53.41 | 61.54 | 1.40 | 31 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/19/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/19/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9