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: 9/20/2025
| 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 | 09/21/2025 | 22:12:01 | 70.70,-157.60 | 70.29 | 09/21/2025 | 22:13:10 | 70.58,-156.11 | 70.15 | 56.41 | 69 |
| 2 | 09/21/2025 | 23:02:32 | -70.04, 10.76 | 110.38 | 09/21/2025 | 23:02:48 | -70.03, 10.72 | 110.39 | 1.95 | 16 |
| 3 | 09/21/2025 | 23:53:16 | 69.91, 178.26 | 69.51 | 09/21/2025 | 23:52:15 | 69.93, 178.23 | 69.53 | 1.85 | 61 |
| 4 | 09/24/2025 | 14:28:43 | 70.10, -40.87 | 70.72 | 09/24/2025 | 14:29:49 | 70.12, -40.90 | 70.73 | 2.51 | 66 |
| 5 | 09/24/2025 | 15:19:25 | -70.02, 126.56 | 109.35 | 09/24/2025 | 15:19:19 | -70.01, 126.57 | 109.37 | 1.61 | 6 |
| 6 | 09/24/2025 | 16:10:03 | 69.58, -65.47 | 70.21 | 09/24/2025 | 16:08:51 | 69.63, -66.31 | 70.27 | 33.10 | 72 |
| 7 | 09/27/2025 | 06:45:36 | 70.09, 74.93 | 71.74 | 09/27/2025 | 06:46:20 | 70.08, 74.91 | 71.73 | 1.17 | 44 |
| 8 | 09/27/2025 | 07:36:17 | -69.96,-117.56 | 108.38 | 09/27/2025 | 07:35:50 | -69.97,-117.60 | 108.37 | 2.04 | 27 |
| 9 | 09/29/2025 | 23:02:29 | 70.08,-169.28 | 72.78 | 09/29/2025 | 23:02:50 | 70.07,-169.22 | 72.76 | 2.80 | 21 |
| 10 | 09/29/2025 | 23:53:10 | -69.95, -1.77 | 107.34 | 09/29/2025 | 23:52:20 | -69.97, -1.73 | 107.33 | 2.11 | 50 |
| 11 | 10/02/2025 | 14:28:39 | -70.31, 138.83 | 105.97 | 10/02/2025 | 14:29:50 | -70.26, 139.30 | 106.02 | 18.35 | 71 |
| 12 | 10/02/2025 | 15:19:20 | 70.03, -53.42 | 73.76 | 10/02/2025 | 15:19:19 | 70.04, -53.38 | 73.77 | 2.30 | 1 |
| 13 | 10/02/2025 | 16:10:01 | -69.90, 114.09 | 106.36 | 10/02/2025 | 16:08:50 | -69.89, 114.04 | 106.38 | 2.62 | 71 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/20/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/20/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9