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: 10/2/2025
| 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 | 10/02/2025 | 14:28:36 | -70.21, 138.99 | 106.07 | 10/02/2025 | 14:29:48 | -70.17, 139.17 | 106.12 | 8.37 | 72 |
| 2 | 10/02/2025 | 15:19:19 | 70.02, -53.40 | 73.75 | 10/02/2025 | 15:19:16 | 70.01, -53.41 | 73.74 | 0.96 | 3 |
| 3 | 10/02/2025 | 16:09:59 | -69.85, 114.17 | 106.41 | 10/02/2025 | 16:08:46 | -69.89, 114.06 | 106.37 | 6.06 | 73 |
| 4 | 10/05/2025 | 06:45:26 | -70.10,-105.05 | 105.16 | 10/05/2025 | 06:46:16 | -70.09,-105.04 | 105.16 | 0.50 | 50 |
| 5 | 10/05/2025 | 07:36:11 | 70.01, 62.39 | 74.77 | 10/05/2025 | 07:35:43 | 69.99, 62.45 | 74.75 | 3.33 | 28 |
| 6 | 10/05/2025 | 08:26:35 | -69.00,-128.82 | 106.24 | 10/05/2025 | 08:25:28 | -69.05,-131.18 | 106.17 | 93.97 | 67 |
| 7 | 10/07/2025 | 22:11:53 | 71.06,-158.13 | 76.84 | 10/07/2025 | 22:12:58 | 70.96,-155.50 | 76.72 | 96.16 | 65 |
| 8 | 10/07/2025 | 23:02:16 | -70.05, 10.81 | 104.18 | 10/07/2025 | 23:02:41 | -70.08, 10.83 | 104.15 | 3.02 | 25 |
| 9 | 10/07/2025 | 23:53:01 | 69.97, 178.25 | 75.75 | 10/07/2025 | 23:52:08 | 69.97, 178.32 | 75.76 | 2.90 | 53 |
| 10 | 10/10/2025 | 14:28:26 | 70.14, -40.86 | 76.92 | 10/10/2025 | 14:29:37 | 70.12, -40.85 | 76.89 | 2.38 | 71 |
| 11 | 10/10/2025 | 15:19:07 | -70.02, 126.64 | 103.19 | 10/10/2025 | 15:19:07 | -70.01, 126.63 | 103.21 | 1.64 | 0 |
| 12 | 10/10/2025 | 16:09:48 | 69.73, -65.61 | 76.53 | 10/10/2025 | 16:08:36 | 69.78, -66.04 | 76.59 | 17.75 | 72 |
| 13 | 10/13/2025 | 06:45:16 | 70.07, 75.03 | 77.86 | 10/13/2025 | 06:46:01 | 70.10, 75.03 | 77.88 | 3.03 | 45 |
| 14 | 10/13/2025 | 07:35:58 | -70.01,-117.55 | 102.20 | 10/13/2025 | 07:35:31 | -69.99,-117.48 | 102.22 | 2.96 | 27 |
| 15 | 10/15/2025 | 22:11:38 | -70.99, 22.04 | 100.24 | 10/15/2025 | 22:12:44 | -70.91, 24.50 | 100.32 | 89.81 | 66 |
| 16 | 10/15/2025 | 23:02:06 | 70.02,-169.10 | 78.80 | 10/15/2025 | 23:02:25 | 70.03,-169.16 | 78.80 | 2.47 | 19 |
| 17 | 10/15/2025 | 23:52:47 | -69.90, -1.60 | 101.31 | 10/15/2025 | 23:51:55 | -69.92, -1.68 | 101.30 | 3.59 | 52 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/2/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/02/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9