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: 7/19/2025
| 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 | 07/19/2025 | 22:12:02 | 70.11,-156.72 | 49.45 | 07/19/2025 | 22:12:53 | 70.12,-156.74 | 49.45 | 1.61 | 51 |
| 2 | 07/19/2025 | 23:02:44 | -70.02, 10.74 | 130.65 | 07/19/2025 | 23:02:23 | -70.02, 10.74 | 130.65 | 0.42 | 21 |
| 3 | 07/19/2025 | 23:53:11 | 69.00, 179.52 | 48.29 | 07/19/2025 | 23:52:05 | 69.08, 177.12 | 48.48 | 96.12 | 66 |
| 4 | 07/22/2025 | 14:28:57 | 70.07, -40.88 | 49.92 | 07/22/2025 | 14:29:24 | 70.09, -40.91 | 49.94 | 2.77 | 27 |
| 5 | 07/22/2025 | 15:19:39 | -69.97, 126.59 | 130.18 | 07/22/2025 | 15:18:54 | -69.99, 126.57 | 130.16 | 2.32 | 45 |
| 6 | 07/25/2025 | 05:55:14 | -70.44, -93.01 | 129.13 | 07/25/2025 | 05:56:25 | -70.32, -92.34 | 129.29 | 28.07 | 71 |
| 7 | 07/25/2025 | 06:45:52 | 70.03, 74.94 | 50.44 | 07/25/2025 | 06:45:55 | 70.05, 74.90 | 50.46 | 2.37 | 3 |
| 8 | 07/25/2025 | 07:36:34 | -69.92,-117.57 | 129.67 | 07/25/2025 | 07:35:25 | -69.94,-117.61 | 129.63 | 2.90 | 69 |
| 9 | 07/27/2025 | 22:12:04 | -70.14, 23.24 | 128.86 | 07/27/2025 | 22:12:58 | -70.15, 23.29 | 128.85 | 2.87 | 54 |
| 10 | 07/27/2025 | 23:02:47 | 69.99,-169.23 | 51.01 | 07/27/2025 | 23:02:26 | 69.98,-169.30 | 51.00 | 2.84 | 21 |
| 11 | 07/27/2025 | 23:53:16 | -69.19, -0.75 | 129.83 | 07/27/2025 | 23:52:08 | -69.23, -2.70 | 129.71 | 77.25 | 68 |
| 12 | 07/30/2025 | 14:28:58 | -70.10, 139.07 | 128.26 | 07/30/2025 | 14:29:28 | -70.08, 139.07 | 128.28 | 1.97 | 30 |
| 13 | 07/30/2025 | 15:19:41 | 69.96, -53.42 | 51.61 | 07/30/2025 | 15:18:55 | 69.96, -53.45 | 51.62 | 1.27 | 46 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/19/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/19/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9