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: 7/22/2025
| 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 | 07/22/2025 | 14:28:57 | 70.08, -40.90 | 49.93 | 07/22/2025 | 14:29:24 | 70.08, -40.92 | 49.93 | 1.08 | 27 |
| 2 | 07/22/2025 | 15:19:39 | -69.98, 126.57 | 130.17 | 07/22/2025 | 15:18:54 | -69.97, 126.56 | 130.17 | 0.88 | 45 |
| 3 | 07/25/2025 | 05:55:13 | -70.40, -92.94 | 129.18 | 07/25/2025 | 05:56:25 | -70.30, -92.37 | 129.31 | 24.02 | 72 |
| 4 | 07/25/2025 | 06:45:52 | 70.04, 74.93 | 50.45 | 07/25/2025 | 06:45:55 | 70.03, 74.89 | 50.45 | 1.81 | 3 |
| 5 | 07/25/2025 | 07:36:34 | -69.93,-117.59 | 129.65 | 07/25/2025 | 07:35:25 | -69.93,-117.63 | 129.65 | 1.53 | 69 |
| 6 | 07/27/2025 | 22:12:04 | -70.15, 23.22 | 128.84 | 07/27/2025 | 22:12:58 | -70.13, 23.27 | 128.87 | 2.45 | 54 |
| 7 | 07/27/2025 | 23:02:47 | 70.00,-169.25 | 51.01 | 07/27/2025 | 23:02:25 | 70.02,-169.25 | 51.04 | 2.12 | 22 |
| 8 | 07/27/2025 | 23:53:16 | -69.20, -0.76 | 129.82 | 07/27/2025 | 23:52:07 | -69.26, -2.66 | 129.68 | 74.89 | 69 |
| 9 | 07/30/2025 | 14:28:58 | -70.11, 139.05 | 128.25 | 07/30/2025 | 14:29:27 | -70.11, 139.11 | 128.26 | 2.46 | 29 |
| 10 | 07/30/2025 | 15:19:41 | 69.97, -53.43 | 51.62 | 07/30/2025 | 15:18:54 | 69.99, -53.40 | 51.65 | 2.85 | 47 |
| 11 | 08/02/2025 | 05:55:14 | 70.36, 87.12 | 52.68 | 08/02/2025 | 05:56:25 | 70.28, 87.60 | 52.57 | 20.46 | 71 |
| 12 | 08/02/2025 | 06:45:53 | -70.07,-105.13 | 127.61 | 08/02/2025 | 06:45:57 | -70.07,-105.06 | 127.62 | 2.70 | 4 |
| 13 | 08/02/2025 | 07:36:36 | 69.94, 62.39 | 52.26 | 08/02/2025 | 07:35:24 | 69.95, 62.42 | 52.28 | 1.66 | 72 |
| 14 | 08/04/2025 | 22:12:05 | 70.12,-156.75 | 53.14 | 08/04/2025 | 22:12:57 | 70.11,-156.75 | 53.11 | 1.69 | 52 |
| 15 | 08/04/2025 | 23:02:47 | -69.99, 10.77 | 127.00 | 08/04/2025 | 23:02:27 | -70.01, 10.74 | 126.97 | 2.39 | 20 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/22/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/22/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9