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: 9/17/2025
| 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 | 09/19/2025 | 06:45:40 | -70.09,-105.09 | 111.37 | 09/19/2025 | 06:46:16 | -70.07,-105.08 | 111.38 | 1.65 | 36 |
| 2 | 09/19/2025 | 07:36:24 | 69.96, 62.40 | 68.53 | 09/19/2025 | 07:35:43 | 69.97, 62.42 | 68.54 | 1.18 | 41 |
| 3 | 09/21/2025 | 22:11:59 | 70.56,-157.38 | 70.15 | 09/21/2025 | 22:13:09 | 70.47,-156.25 | 70.04 | 43.25 | 70 |
| 4 | 09/21/2025 | 23:02:32 | -70.01, 10.80 | 110.41 | 09/21/2025 | 23:02:45 | -70.03, 10.74 | 110.39 | 3.10 | 13 |
| 5 | 09/21/2025 | 23:53:17 | 69.94, 178.22 | 69.54 | 09/21/2025 | 23:52:12 | 69.93, 178.24 | 69.53 | 1.70 | 65 |
| 6 | 09/24/2025 | 14:28:44 | 70.12, -40.91 | 70.74 | 09/24/2025 | 14:29:43 | 70.14, -40.85 | 70.75 | 2.65 | 59 |
| 7 | 09/24/2025 | 15:19:25 | -69.99, 126.61 | 109.38 | 09/24/2025 | 15:19:14 | -69.97, 126.55 | 109.41 | 3.24 | 11 |
| 8 | 09/24/2025 | 16:09:59 | 69.34, -65.12 | 69.97 | 09/24/2025 | 16:08:50 | 69.37, -66.63 | 70.02 | 59.42 | 69 |
| 9 | 09/27/2025 | 06:45:35 | 70.06, 74.97 | 71.71 | 09/27/2025 | 06:46:11 | 70.06, 74.92 | 71.71 | 1.83 | 36 |
| 10 | 09/27/2025 | 07:36:17 | -69.98,-117.59 | 108.36 | 09/27/2025 | 07:35:41 | -69.95,-117.59 | 108.39 | 3.29 | 36 |
| 11 | 09/29/2025 | 22:11:54 | -70.70, 22.43 | 106.61 | 09/29/2025 | 22:13:03 | -70.62, 23.99 | 106.71 | 58.04 | 69 |
| 12 | 09/29/2025 | 23:02:28 | 70.05,-169.23 | 72.74 | 09/29/2025 | 23:02:38 | 70.07,-169.17 | 72.76 | 3.41 | 10 |
| 13 | 09/29/2025 | 23:53:09 | -69.92, -1.72 | 107.38 | 09/29/2025 | 23:52:09 | -69.91, -1.76 | 107.39 | 1.78 | 60 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/17/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/17/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9