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: 8/6/2025
| 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 | 08/07/2025 | 14:29:00 | 70.11, -40.95 | 53.86 | 08/07/2025 | 14:29:33 | 70.09, -40.92 | 53.83 | 2.42 | 33 |
| 2 | 08/07/2025 | 15:19:41 | -69.99, 126.54 | 126.26 | 08/07/2025 | 15:19:02 | -69.98, 126.55 | 126.27 | 1.59 | 39 |
| 3 | 08/10/2025 | 05:55:20 | -70.71, -93.44 | 124.76 | 08/10/2025 | 05:56:29 | -70.59, -91.96 | 124.93 | 56.08 | 69 |
| 4 | 08/10/2025 | 06:45:53 | 70.05, 74.91 | 54.56 | 08/10/2025 | 06:46:04 | 70.05, 74.90 | 54.56 | 0.87 | 11 |
| 5 | 08/10/2025 | 07:36:35 | -69.92,-117.59 | 125.56 | 08/10/2025 | 07:35:34 | -69.94,-117.62 | 125.53 | 2.43 | 61 |
| 6 | 08/12/2025 | 22:12:04 | -70.12, 23.26 | 124.58 | 08/12/2025 | 22:13:09 | -70.10, 23.20 | 124.60 | 2.72 | 65 |
| 7 | 08/12/2025 | 23:02:47 | 69.99,-169.22 | 55.30 | 08/12/2025 | 23:02:36 | 70.00,-169.30 | 55.31 | 3.21 | 11 |
| 8 | 08/12/2025 | 23:53:23 | -69.54, -1.25 | 125.16 | 08/12/2025 | 23:52:12 | -69.56, -2.27 | 125.10 | 39.50 | 71 |
| 9 | 08/15/2025 | 14:28:59 | -70.11, 139.04 | 123.76 | 08/15/2025 | 14:29:40 | -70.09, 139.07 | 123.79 | 2.36 | 41 |
| 10 | 08/15/2025 | 15:19:42 | 69.98, -53.45 | 56.12 | 08/15/2025 | 15:19:07 | 69.98, -53.44 | 56.12 | 0.15 | 35 |
| 11 | 08/18/2025 | 05:55:23 | 70.82, 86.37 | 57.83 | 08/18/2025 | 05:56:31 | 70.72, 88.23 | 57.65 | 68.97 | 68 |
| 12 | 08/18/2025 | 06:45:52 | -70.06,-105.10 | 122.97 | 08/18/2025 | 06:46:10 | -70.07,-105.09 | 122.97 | 0.99 | 18 |
| 13 | 08/18/2025 | 07:36:35 | 69.93, 62.40 | 56.91 | 08/18/2025 | 07:35:37 | 69.95, 62.39 | 56.94 | 2.61 | 58 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/6/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/06/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9