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: 7/17/2025
| 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 | 05:55:10 | 70.30, 87.23 | 49.16 | 07/17/2025 | 05:56:21 | 70.22, 87.51 | 49.06 | 13.88 | 71 |
| 2 | 07/17/2025 | 06:45:49 | -70.05,-105.07 | 131.10 | 07/17/2025 | 06:45:52 | -70.05,-105.09 | 131.10 | 0.83 | 3 |
| 3 | 07/17/2025 | 07:36:32 | 69.88, 62.49 | 48.73 | 07/17/2025 | 07:35:20 | 69.89, 62.33 | 48.76 | 6.43 | 72 |
| 4 | 07/19/2025 | 22:12:03 | 70.14,-156.77 | 49.48 | 07/19/2025 | 22:12:53 | 70.15,-156.71 | 49.47 | 2.17 | 50 |
| 5 | 07/19/2025 | 23:02:45 | -70.05, 10.70 | 130.62 | 07/19/2025 | 23:02:23 | -70.04, 10.77 | 130.63 | 2.83 | 22 |
| 6 | 07/19/2025 | 23:53:12 | 69.03, 179.48 | 48.33 | 07/19/2025 | 23:52:06 | 69.05, 177.08 | 48.45 | 95.59 | 66 |
| 7 | 07/22/2025 | 14:28:58 | 70.10, -40.93 | 49.96 | 07/22/2025 | 14:29:24 | 70.12, -40.88 | 49.96 | 2.80 | 26 |
| 8 | 07/22/2025 | 15:19:40 | -70.00, 126.54 | 130.15 | 07/22/2025 | 15:18:54 | -70.01, 126.61 | 130.13 | 3.30 | 46 |
| 9 | 07/25/2025 | 05:55:13 | -70.42, -92.97 | 129.16 | 07/25/2025 | 05:56:25 | -70.29, -92.38 | 129.32 | 25.88 | 72 |
| 10 | 07/25/2025 | 06:45:52 | 70.06, 74.90 | 50.48 | 07/25/2025 | 06:45:54 | 70.07, 74.94 | 50.48 | 2.03 | 2 |
| 11 | 07/25/2025 | 07:36:34 | -69.95,-117.62 | 129.64 | 07/25/2025 | 07:35:24 | -69.97,-117.57 | 129.61 | 3.18 | 70 |
| 12 | 07/27/2025 | 22:12:03 | -70.11, 23.27 | 128.88 | 07/27/2025 | 22:12:58 | -70.13, 23.26 | 128.87 | 1.76 | 55 |
| 13 | 07/27/2025 | 23:02:47 | 70.03,-169.28 | 51.04 | 07/27/2025 | 23:02:25 | 70.01,-169.26 | 51.03 | 1.76 | 22 |
| 14 | 07/27/2025 | 23:53:15 | -69.17, -0.71 | 129.86 | 07/27/2025 | 23:52:07 | -69.25, -2.66 | 129.68 | 77.49 | 68 |
| 15 | 07/30/2025 | 14:28:58 | -70.08, 139.10 | 128.28 | 07/30/2025 | 14:29:29 | -70.06, 139.04 | 128.31 | 3.12 | 31 |
| 16 | 07/30/2025 | 15:19:42 | 69.99, -53.47 | 51.64 | 07/30/2025 | 15:18:55 | 69.99, -53.41 | 51.64 | 2.20 | 47 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/17/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/17/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9