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: 8/17/2025
| 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 | 08/18/2025 | 05:55:22 | 70.80, 86.40 | 57.81 | 08/18/2025 | 05:56:30 | 70.69, 88.19 | 57.63 | 66.72 | 68 |
| 2 | 08/18/2025 | 06:45:52 | -70.05,-105.09 | 122.98 | 08/18/2025 | 06:46:10 | -70.03,-105.14 | 123.00 | 3.08 | 18 |
| 3 | 08/18/2025 | 07:36:35 | 69.91, 62.43 | 56.89 | 08/18/2025 | 07:35:37 | 69.93, 62.36 | 56.92 | 3.43 | 58 |
| 4 | 08/20/2025 | 22:12:04 | 70.13,-156.75 | 57.97 | 08/20/2025 | 22:13:10 | 70.14,-156.74 | 57.97 | 1.40 | 66 |
| 5 | 08/20/2025 | 23:02:46 | -70.00, 10.76 | 122.15 | 08/20/2025 | 23:02:40 | -70.03, 10.73 | 122.13 | 2.69 | 6 |
| 6 | 08/20/2025 | 23:53:24 | 69.60, 178.66 | 57.45 | 08/20/2025 | 23:52:12 | 69.65, 177.85 | 57.52 | 31.99 | 72 |
| 7 | 08/23/2025 | 14:28:58 | 70.08, -40.91 | 58.82 | 08/23/2025 | 14:29:40 | 70.11, -40.90 | 58.84 | 3.45 | 42 |
| 8 | 08/23/2025 | 15:19:41 | -70.01, 126.51 | 121.25 | 08/23/2025 | 15:19:10 | -70.01, 126.58 | 121.25 | 2.76 | 31 |
| 9 | 08/26/2025 | 05:55:23 | -70.96, -93.86 | 119.36 | 08/26/2025 | 05:56:30 | -70.84, -91.59 | 119.55 | 83.85 | 67 |
| 10 | 08/26/2025 | 06:45:51 | 70.04, 74.92 | 59.70 | 08/26/2025 | 06:46:09 | 70.07, 74.93 | 59.72 | 3.21 | 18 |
| 11 | 08/26/2025 | 07:36:34 | -69.97,-117.65 | 120.37 | 08/26/2025 | 07:35:39 | -69.97,-117.59 | 120.37 | 2.65 | 55 |
| 12 | 08/28/2025 | 22:12:02 | -70.14, 23.23 | 119.28 | 08/28/2025 | 22:13:12 | -70.13, 23.25 | 119.30 | 1.72 | 70 |
| 13 | 08/28/2025 | 23:02:45 | 70.01,-169.25 | 60.60 | 08/28/2025 | 23:02:39 | 70.02,-169.27 | 60.61 | 0.91 | 6 |
| 14 | 08/28/2025 | 23:53:24 | -69.73, -1.51 | 119.69 | 08/28/2025 | 23:52:11 | -69.80, -1.93 | 119.59 | 18.16 | 73 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/17/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/17/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9