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: 7/18/2025
| 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 | 07/19/2025 | 22:12:03 | 70.14,-156.75 | 49.47 | 07/19/2025 | 22:12:53 | 70.16,-156.70 | 49.48 | 3.05 | 50 |
| 2 | 07/19/2025 | 23:02:45 | -70.04, 10.71 | 130.63 | 07/19/2025 | 23:02:23 | -70.05, 10.78 | 130.62 | 2.87 | 22 |
| 3 | 07/19/2025 | 23:53:12 | 69.02, 179.49 | 48.32 | 07/19/2025 | 23:52:06 | 69.06, 177.09 | 48.46 | 95.68 | 66 |
| 4 | 07/22/2025 | 14:28:57 | 70.09, -40.92 | 49.95 | 07/22/2025 | 14:29:24 | 70.07, -40.94 | 49.92 | 2.56 | 27 |
| 5 | 07/22/2025 | 15:19:39 | -69.99, 126.55 | 130.16 | 07/22/2025 | 15:18:54 | -69.97, 126.55 | 130.18 | 2.48 | 45 |
| 6 | 07/25/2025 | 05:55:13 | -70.41, -92.96 | 129.17 | 07/25/2025 | 05:56:25 | -70.30, -92.37 | 129.31 | 24.92 | 72 |
| 7 | 07/25/2025 | 06:45:52 | 70.05, 74.91 | 50.47 | 07/25/2025 | 06:45:55 | 70.03, 74.88 | 50.44 | 3.22 | 3 |
| 8 | 07/25/2025 | 07:36:34 | -69.94,-117.61 | 129.65 | 07/25/2025 | 07:35:25 | -69.93,-117.63 | 129.65 | 2.08 | 69 |
| 9 | 07/27/2025 | 22:12:04 | -70.16, 23.21 | 128.83 | 07/27/2025 | 22:12:58 | -70.14, 23.27 | 128.87 | 3.27 | 54 |
| 10 | 07/27/2025 | 23:02:47 | 70.02,-169.27 | 51.03 | 07/27/2025 | 23:02:25 | 70.02,-169.25 | 51.04 | 0.92 | 22 |
| 11 | 07/27/2025 | 23:53:16 | -69.21, -0.78 | 129.81 | 07/27/2025 | 23:52:07 | -69.26, -2.65 | 129.67 | 74.13 | 69 |
| 12 | 07/30/2025 | 14:28:58 | -70.07, 139.11 | 128.29 | 07/30/2025 | 14:29:29 | -70.07, 139.05 | 128.30 | 2.37 | 31 |
| 13 | 07/30/2025 | 15:19:42 | 69.98, -53.45 | 51.63 | 07/30/2025 | 15:18:55 | 70.00, -53.39 | 51.65 | 3.08 | 47 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/18/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/18/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9