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: 9/18/2025
| 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 | 1.60 | 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 | 1.48 | 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 | 43.23 | 70 |
| 4 | 09/21/2025 | 23:02:32 | -70.01, 10.80 | 110.40 | 09/21/2025 | 23:02:45 | -70.03, 10.74 | 110.39 | 2.92 | 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 | 1.71 | 65 |
| 6 | 09/24/2025 | 14:28:44 | 70.13, -40.91 | 70.74 | 09/24/2025 | 14:29:43 | 70.13, -40.86 | 70.75 | 2.27 | 59 |
| 7 | 09/24/2025 | 15:19:25 | -70.00, 126.60 | 109.38 | 09/24/2025 | 15:19:13 | -70.02, 126.62 | 109.36 | 2.94 | 12 |
| 8 | 09/24/2025 | 16:09:59 | 69.34, -65.12 | 69.97 | 09/24/2025 | 16:08:50 | 69.36, -66.64 | 70.01 | 59.50 | 69 |
| 9 | 09/27/2025 | 06:45:35 | 70.06, 74.97 | 71.72 | 09/27/2025 | 06:46:11 | 70.05, 74.91 | 71.70 | 2.52 | 36 |
| 10 | 09/27/2025 | 07:36:17 | -69.98,-117.60 | 108.35 | 09/27/2025 | 07:35:40 | -69.99,-117.53 | 108.34 | 2.89 | 37 |
| 11 | 09/29/2025 | 22:11:54 | -70.71, 22.42 | 106.60 | 09/29/2025 | 22:13:03 | -70.60, 23.97 | 106.72 | 58.16 | 69 |
| 12 | 09/29/2025 | 23:02:28 | 70.05,-169.24 | 72.75 | 09/29/2025 | 23:02:38 | 70.05,-169.19 | 72.75 | 2.13 | 10 |
| 13 | 09/29/2025 | 23:53:09 | -69.93, -1.73 | 107.37 | 09/29/2025 | 23:52:08 | -69.95, -1.70 | 107.35 | 2.69 | 61 |
| 14 | 10/02/2025 | 14:28:36 | -70.13, 139.12 | 106.16 | 10/02/2025 | 14:29:39 | -70.10, 139.13 | 106.19 | 3.05 | 63 |
| 15 | 10/02/2025 | 15:19:20 | 70.00, -53.38 | 73.73 | 10/02/2025 | 15:19:06 | 69.99, -53.39 | 73.72 | 1.80 | 14 |
| 16 | 10/02/2025 | 16:09:53 | -69.45, 114.75 | 106.81 | 10/02/2025 | 16:08:43 | -69.50, 113.57 | 106.76 | 46.29 | 70 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/18/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/18/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9