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: 7/16/2025
| 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 | 07/17/2025 | 05:55:09 | 70.26, 87.29 | 49.12 | 07/17/2025 | 05:56:21 | 70.21, 87.50 | 49.04 | 9.64 | 72 |
| 2 | 07/17/2025 | 06:45:49 | -70.06,-105.09 | 131.09 | 07/17/2025 | 06:45:52 | -70.04,-105.11 | 131.11 | 2.16 | 3 |
| 3 | 07/17/2025 | 07:36:32 | 69.89, 62.47 | 48.74 | 07/17/2025 | 07:35:19 | 69.94, 62.39 | 48.80 | 5.99 | 73 |
| 4 | 07/19/2025 | 22:12:03 | 70.16,-156.79 | 49.49 | 07/19/2025 | 22:12:53 | 70.14,-156.73 | 49.46 | 3.11 | 50 |
| 5 | 07/19/2025 | 23:02:44 | -70.00, 10.76 | 130.67 | 07/19/2025 | 23:02:23 | -70.03, 10.76 | 130.64 | 3.07 | 21 |
| 6 | 07/19/2025 | 23:53:12 | 69.04, 179.46 | 48.34 | 07/19/2025 | 23:52:05 | 69.09, 177.13 | 48.49 | 92.65 | 67 |
| 7 | 07/22/2025 | 14:28:58 | 70.11, -40.95 | 49.97 | 07/22/2025 | 14:29:24 | 70.11, -40.89 | 49.96 | 2.37 | 26 |
| 8 | 07/22/2025 | 15:19:40 | -70.00, 126.53 | 130.14 | 07/22/2025 | 15:18:54 | -70.01, 126.60 | 130.14 | 2.85 | 46 |
| 9 | 07/25/2025 | 05:55:14 | -70.42, -92.98 | 129.15 | 07/25/2025 | 05:56:25 | -70.35, -92.31 | 129.27 | 26.51 | 71 |
| 10 | 07/25/2025 | 06:45:53 | 70.07, 74.88 | 50.48 | 07/25/2025 | 06:45:55 | 70.07, 74.94 | 50.48 | 1.97 | 2 |
| 11 | 07/25/2025 | 07:36:35 | -69.96,-117.63 | 129.63 | 07/25/2025 | 07:35:25 | -69.97,-117.57 | 129.61 | 2.84 | 70 |
| 12 | 07/27/2025 | 22:12:03 | -70.12, 23.27 | 128.88 | 07/27/2025 | 22:12:58 | -70.13, 23.26 | 128.87 | 1.89 | 55 |
| 13 | 07/27/2025 | 23:02:47 | 70.03,-169.29 | 51.04 | 07/27/2025 | 23:02:25 | 70.01,-169.26 | 51.03 | 1.93 | 22 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/16/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/16/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9