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: 9/16/2025
| 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 | 09/16/2025 | 14:28:47 | -70.10, 139.11 | 112.39 | 09/16/2025 | 14:29:47 | -70.11, 139.09 | 112.38 | 1.74 | 60 |
| 2 | 09/16/2025 | 15:19:32 | 70.03, -53.48 | 67.56 | 09/16/2025 | 15:19:14 | 70.01, -53.40 | 67.54 | 3.33 | 18 |
| 3 | 09/16/2025 | 16:10:03 | -69.37, 114.82 | 113.11 | 09/16/2025 | 16:08:53 | -69.40, 113.39 | 113.05 | 56.18 | 70 |
| 4 | 09/19/2025 | 06:45:40 | -70.07,-105.07 | 111.38 | 09/19/2025 | 06:46:16 | -70.09,-105.06 | 111.37 | 1.89 | 36 |
| 5 | 09/19/2025 | 07:36:24 | 69.95, 62.43 | 68.51 | 09/19/2025 | 07:35:44 | 69.93, 62.36 | 68.49 | 3.18 | 40 |
| 6 | 09/21/2025 | 22:11:59 | 70.55,-157.36 | 70.14 | 09/21/2025 | 22:13:09 | 70.48,-156.23 | 70.05 | 42.33 | 70 |
| 7 | 09/21/2025 | 23:02:33 | -70.05, 10.75 | 110.37 | 09/21/2025 | 23:02:45 | -70.04, 10.76 | 110.38 | 0.67 | 12 |
| 8 | 09/21/2025 | 23:53:17 | 69.92, 178.24 | 69.52 | 09/21/2025 | 23:52:12 | 69.94, 178.26 | 69.54 | 1.60 | 65 |
| 9 | 09/24/2025 | 14:28:43 | 70.11, -40.88 | 70.72 | 09/24/2025 | 14:29:43 | 70.09, -40.92 | 70.70 | 2.59 | 60 |
| 10 | 09/24/2025 | 15:19:24 | -69.97, 126.64 | 109.40 | 09/24/2025 | 15:19:13 | -69.98, 126.56 | 109.40 | 2.92 | 11 |
| 11 | 09/24/2025 | 16:09:58 | 69.32, -65.10 | 69.95 | 09/24/2025 | 16:08:49 | 69.37, -66.62 | 70.02 | 60.21 | 69 |
| 12 | 09/27/2025 | 06:45:35 | 70.04, 75.00 | 71.70 | 09/27/2025 | 06:46:11 | 70.06, 74.93 | 71.71 | 3.37 | 36 |
| 13 | 09/27/2025 | 07:36:17 | -69.96,-117.56 | 108.38 | 09/27/2025 | 07:35:41 | -69.95,-117.59 | 108.39 | 1.40 | 36 |
| 14 | 09/29/2025 | 22:11:54 | -70.68, 22.47 | 106.63 | 09/29/2025 | 22:13:04 | -70.56, 23.90 | 106.77 | 54.71 | 70 |
| 15 | 09/29/2025 | 23:02:28 | 70.03,-169.21 | 72.72 | 09/29/2025 | 23:02:39 | 70.01,-169.25 | 72.70 | 3.03 | 11 |
| 16 | 09/29/2025 | 23:53:09 | -69.90, -1.69 | 107.40 | 09/29/2025 | 23:52:09 | -69.90, -1.76 | 107.39 | 2.94 | 60 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/16/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/16/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9