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: 4/19/2025
| 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 | 04/20/2025 | 06:44:52 | 70.20, 74.98 | 58.50 | 04/20/2025 | 06:45:49 | 70.19, 74.98 | 58.49 | 0.63 | 57 |
| 2 | 04/20/2025 | 07:35:34 | -70.08,-117.52 | 121.63 | 04/20/2025 | 07:35:19 | -70.07,-117.55 | 121.64 | 1.07 | 15 |
| 3 | 04/20/2025 | 08:26:05 | 69.31, 50.92 | 57.56 | 04/20/2025 | 08:24:57 | 69.36, 49.12 | 57.67 | 70.98 | 68 |
| 4 | 04/22/2025 | 23:01:40 | 70.14,-169.13 | 57.53 | 04/22/2025 | 23:02:15 | 70.15,-169.19 | 57.54 | 2.58 | 35 |
| 5 | 04/22/2025 | 23:52:23 | -70.07, -1.72 | 122.55 | 04/22/2025 | 23:51:44 | -70.09, -1.64 | 122.53 | 3.58 | 39 |
| 6 | 04/25/2025 | 14:27:57 | -70.79, 138.30 | 122.66 | 04/25/2025 | 14:29:06 | -70.67, 139.81 | 122.83 | 57.33 | 69 |
| 7 | 04/25/2025 | 15:18:30 | 70.14, -53.35 | 56.66 | 04/25/2025 | 15:18:41 | 70.12, -53.34 | 56.63 | 2.24 | 11 |
| 8 | 04/25/2025 | 16:09:12 | -70.02, 114.15 | 123.48 | 04/25/2025 | 16:08:11 | -70.01, 114.13 | 123.49 | 1.37 | 61 |
| 9 | 04/28/2025 | 06:44:36 | -70.23,-105.01 | 124.10 | 04/28/2025 | 06:45:39 | -70.22,-104.95 | 124.12 | 2.57 | 63 |
| 10 | 04/28/2025 | 07:35:19 | 70.10, 62.50 | 55.76 | 04/28/2025 | 07:35:06 | 70.11, 62.53 | 55.77 | 1.32 | 13 |
| 11 | 04/28/2025 | 08:25:53 | -69.56,-129.38 | 124.81 | 04/28/2025 | 08:24:42 | -69.67,-130.44 | 124.67 | 43.20 | 71 |
| 12 | 04/30/2025 | 23:01:24 | -70.15, 10.90 | 125.00 | 04/30/2025 | 23:02:04 | -70.17, 10.87 | 124.99 | 2.34 | 40 |
| 13 | 04/30/2025 | 23:52:08 | 70.08, 178.33 | 54.91 | 04/30/2025 | 23:51:31 | 70.06, 178.35 | 54.89 | 2.34 | 37 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/19/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/19/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9