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: 9/23/2025
| 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 | 09/24/2025 | 14:28:43 | 70.10, -40.88 | 70.72 | 09/24/2025 | 14:29:49 | 70.11, -40.92 | 70.72 | 1.86 | 66 |
| 2 | 09/24/2025 | 15:19:25 | -70.03, 126.55 | 109.35 | 09/24/2025 | 15:19:18 | -70.05, 126.63 | 109.33 | 3.30 | 7 |
| 3 | 09/24/2025 | 16:10:02 | 69.53, -65.39 | 70.16 | 09/24/2025 | 16:08:51 | 69.61, -66.33 | 70.26 | 37.56 | 71 |
| 4 | 09/27/2025 | 06:45:36 | 70.10, 74.91 | 71.76 | 09/27/2025 | 06:46:19 | 70.08, 74.92 | 71.74 | 2.19 | 43 |
| 5 | 09/27/2025 | 07:36:17 | -69.98,-117.59 | 108.36 | 09/27/2025 | 07:35:49 | -69.97,-117.60 | 108.37 | 0.83 | 28 |
| 6 | 09/29/2025 | 22:12:01 | -71.08, 21.80 | 106.22 | 09/29/2025 | 22:13:07 | -70.95, 24.45 | 106.38 | 97.11 | 66 |
| 7 | 09/29/2025 | 23:02:28 | 70.06,-169.25 | 72.76 | 09/29/2025 | 23:02:48 | 70.08,-169.20 | 72.77 | 2.76 | 20 |
| 8 | 09/29/2025 | 23:53:09 | -69.94, -1.74 | 107.36 | 09/29/2025 | 23:52:19 | -69.91, -1.80 | 107.38 | 3.19 | 50 |
| 9 | 10/02/2025 | 14:28:37 | -70.27, 138.91 | 106.02 | 10/02/2025 | 14:29:48 | -70.20, 139.22 | 106.09 | 13.76 | 71 |
| 10 | 10/02/2025 | 15:19:19 | 70.03, -53.42 | 73.76 | 10/02/2025 | 15:19:16 | 70.04, -53.37 | 73.77 | 1.89 | 3 |
| 11 | 10/02/2025 | 16:10:00 | -69.91, 114.08 | 106.35 | 10/02/2025 | 16:08:46 | -69.93, 114.11 | 106.33 | 2.72 | 74 |
| 12 | 10/05/2025 | 06:45:26 | -70.09,-105.04 | 105.16 | 10/05/2025 | 06:46:18 | -70.07,-105.08 | 105.19 | 2.81 | 52 |
| 13 | 10/05/2025 | 07:36:10 | 69.96, 62.47 | 74.72 | 10/05/2025 | 07:35:45 | 69.96, 62.40 | 74.72 | 2.68 | 25 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9