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: 8/9/2025
| 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 | 08/10/2025 | 05:55:20 | -70.70, -93.43 | 124.76 | 08/10/2025 | 05:56:29 | -70.59, -91.95 | 124.93 | 55.54 | 69 |
| 2 | 08/10/2025 | 06:45:53 | 70.04, 74.93 | 54.55 | 08/10/2025 | 06:46:04 | 70.06, 74.91 | 54.57 | 2.58 | 11 |
| 3 | 08/10/2025 | 07:36:36 | -69.97,-117.66 | 125.51 | 08/10/2025 | 07:35:34 | -69.95,-117.62 | 125.53 | 3.08 | 62 |
| 4 | 08/12/2025 | 22:12:04 | -70.11, 23.27 | 124.59 | 08/12/2025 | 22:13:09 | -70.10, 23.20 | 124.61 | 3.21 | 65 |
| 5 | 08/12/2025 | 23:02:48 | 70.03,-169.29 | 55.34 | 08/12/2025 | 23:02:35 | 70.05,-169.23 | 55.36 | 3.35 | 13 |
| 6 | 08/12/2025 | 23:53:23 | -69.54, -1.24 | 125.17 | 08/12/2025 | 23:52:12 | -69.56, -2.28 | 125.10 | 40.18 | 71 |
| 7 | 08/15/2025 | 14:28:59 | -70.11, 139.05 | 123.77 | 08/15/2025 | 14:29:40 | -70.08, 139.04 | 123.81 | 3.42 | 41 |
| 8 | 08/15/2025 | 15:19:42 | 69.97, -53.44 | 56.11 | 08/15/2025 | 15:19:07 | 69.97, -53.46 | 56.11 | 1.16 | 35 |
| 9 | 08/18/2025 | 05:55:22 | 70.81, 86.38 | 57.82 | 08/18/2025 | 05:56:30 | 70.69, 88.19 | 57.63 | 67.67 | 68 |
| 10 | 08/18/2025 | 06:45:52 | -70.05,-105.10 | 122.97 | 08/18/2025 | 06:46:10 | -70.04,-105.14 | 122.99 | 2.55 | 18 |
| 11 | 08/18/2025 | 07:36:35 | 69.92, 62.41 | 56.91 | 08/18/2025 | 07:35:37 | 69.93, 62.36 | 56.92 | 2.15 | 58 |
| 12 | 08/20/2025 | 22:12:04 | 70.14,-156.77 | 57.98 | 08/20/2025 | 22:13:10 | 70.13,-156.75 | 57.97 | 0.80 | 66 |
| 13 | 08/20/2025 | 23:02:46 | -70.01, 10.75 | 122.15 | 08/20/2025 | 23:02:40 | -70.03, 10.74 | 122.13 | 2.71 | 6 |
| 14 | 08/20/2025 | 23:53:23 | 69.56, 178.72 | 57.40 | 08/20/2025 | 23:52:12 | 69.64, 177.84 | 57.52 | 35.22 | 71 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/9/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9