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: 7/29/2025
| 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 | 07/30/2025 | 14:28:57 | -70.06, 139.12 | 128.30 | 07/30/2025 | 14:29:27 | -70.08, 139.08 | 128.28 | 2.81 | 30 |
| 2 | 07/30/2025 | 15:19:41 | 69.97, -53.42 | 51.61 | 07/30/2025 | 15:18:54 | 69.98, -53.43 | 51.63 | 1.05 | 47 |
| 3 | 08/02/2025 | 05:55:13 | 70.31, 87.20 | 52.63 | 08/02/2025 | 05:56:25 | 70.24, 87.56 | 52.54 | 15.34 | 72 |
| 4 | 08/02/2025 | 06:45:52 | -70.03,-105.06 | 127.66 | 08/02/2025 | 06:45:57 | -70.02,-105.12 | 127.67 | 2.38 | 5 |
| 5 | 08/02/2025 | 07:36:36 | 69.94, 62.38 | 52.26 | 08/02/2025 | 07:35:24 | 69.91, 62.37 | 52.24 | 3.14 | 72 |
| 6 | 08/04/2025 | 22:12:05 | 70.13,-156.76 | 53.14 | 08/04/2025 | 22:12:56 | 70.10,-156.75 | 53.11 | 2.71 | 51 |
| 7 | 08/04/2025 | 23:02:47 | -70.01, 10.75 | 126.98 | 08/04/2025 | 23:02:26 | -70.00, 10.73 | 126.98 | 0.75 | 21 |
| 8 | 08/04/2025 | 23:53:14 | 69.02, 179.49 | 52.00 | 08/04/2025 | 23:52:08 | 69.06, 177.11 | 52.14 | 94.77 | 66 |
| 9 | 08/07/2025 | 14:28:59 | 70.06, -40.88 | 53.81 | 08/07/2025 | 14:29:25 | 70.06, -40.93 | 53.80 | 1.85 | 26 |
| 10 | 08/07/2025 | 15:19:42 | -69.99, 126.55 | 126.26 | 08/07/2025 | 15:18:55 | -69.96, 126.56 | 126.29 | 3.24 | 47 |
| 11 | 08/10/2025 | 05:55:12 | -70.28, -92.76 | 125.20 | 08/10/2025 | 05:56:24 | -70.22, -92.45 | 125.29 | 13.51 | 72 |
| 12 | 08/10/2025 | 06:45:53 | 70.05, 74.90 | 54.57 | 08/10/2025 | 06:45:52 | 70.05, 74.94 | 54.56 | 1.54 | 1 |
| 13 | 08/10/2025 | 07:36:35 | -69.92,-117.58 | 125.56 | 08/10/2025 | 07:35:22 | -69.95,-117.56 | 125.53 | 3.37 | 73 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/29/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/29/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9