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: 9/27/2025
| 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 | 09/29/2025 | 22:12:01 | -71.08, 21.79 | 106.22 | 09/29/2025 | 22:13:06 | -70.99, 24.52 | 106.33 | 99.10 | 65 |
| 2 | 09/29/2025 | 23:02:28 | 70.06,-169.25 | 72.76 | 09/29/2025 | 23:02:48 | 70.07,-169.21 | 72.77 | 2.09 | 20 |
| 3 | 09/29/2025 | 23:53:09 | -69.94, -1.75 | 107.36 | 09/29/2025 | 23:52:18 | -69.96, -1.74 | 107.34 | 2.02 | 51 |
| 4 | 10/02/2025 | 14:28:36 | -70.22, 138.98 | 106.07 | 10/02/2025 | 14:29:48 | -70.18, 139.19 | 106.11 | 8.79 | 72 |
| 5 | 10/02/2025 | 15:19:19 | 70.03, -53.42 | 73.76 | 10/02/2025 | 15:19:16 | 70.02, -53.40 | 73.75 | 1.32 | 3 |
| 6 | 10/02/2025 | 16:09:59 | -69.86, 114.16 | 106.40 | 10/02/2025 | 16:08:47 | -69.86, 114.01 | 106.40 | 5.72 | 72 |
| 7 | 10/05/2025 | 06:45:26 | -70.09,-105.04 | 105.16 | 10/05/2025 | 06:46:17 | -70.09,-105.05 | 105.16 | 0.17 | 51 |
| 8 | 10/05/2025 | 07:36:10 | 69.96, 62.47 | 74.72 | 10/05/2025 | 07:35:44 | 69.98, 62.44 | 74.75 | 3.08 | 26 |
| 9 | 10/05/2025 | 08:26:35 | -68.99,-128.82 | 106.24 | 10/05/2025 | 08:25:29 | -69.05,-131.18 | 106.17 | 94.40 | 66 |
| 10 | 10/07/2025 | 23:02:18 | -70.09, 10.75 | 104.14 | 10/07/2025 | 23:02:44 | -70.07, 10.82 | 104.16 | 2.82 | 26 |
| 11 | 10/07/2025 | 23:53:02 | 69.95, 178.27 | 75.74 | 10/07/2025 | 23:52:11 | 69.96, 178.30 | 75.75 | 1.67 | 51 |
| 12 | 10/10/2025 | 14:28:29 | 70.21, -40.97 | 76.99 | 10/10/2025 | 14:29:40 | 70.17, -40.78 | 76.95 | 8.40 | 71 |
| 13 | 10/10/2025 | 15:19:09 | -70.04, 126.61 | 103.17 | 10/10/2025 | 15:19:11 | -70.01, 126.63 | 103.20 | 2.85 | 2 |
| 14 | 10/10/2025 | 16:09:51 | 69.80, -65.72 | 76.60 | 10/10/2025 | 16:08:39 | 69.84, -65.97 | 76.64 | 10.76 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/27/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/27/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9