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: 4/9/2025
| 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 | 04/09/2025 | 14:28:14 | -70.21, 139.13 | 117.66 | 04/09/2025 | 14:29:25 | -70.19, 139.10 | 117.69 | 2.57 | 71 |
| 2 | 04/09/2025 | 15:18:57 | 70.07, -53.35 | 62.19 | 04/09/2025 | 15:18:52 | 70.08, -53.40 | 62.20 | 2.40 | 5 |
| 3 | 04/09/2025 | 16:09:37 | -69.85, 114.30 | 118.06 | 04/09/2025 | 16:08:24 | -69.86, 113.92 | 118.03 | 14.37 | 73 |
| 4 | 04/12/2025 | 06:45:04 | -70.15,-104.99 | 118.71 | 04/12/2025 | 06:45:55 | -70.16,-105.06 | 118.70 | 2.92 | 51 |
| 5 | 04/12/2025 | 07:35:48 | 70.07, 62.44 | 61.20 | 04/12/2025 | 07:35:22 | 70.06, 62.43 | 61.19 | 1.45 | 26 |
| 6 | 04/12/2025 | 08:26:13 | -69.05,-128.76 | 119.87 | 04/12/2025 | 08:25:07 | -69.12,-131.20 | 119.73 | 96.91 | 66 |
| 7 | 04/14/2025 | 23:01:55 | -70.16, 10.78 | 119.67 | 04/14/2025 | 23:02:24 | -70.15, 10.79 | 119.69 | 1.04 | 29 |
| 8 | 04/14/2025 | 23:52:38 | 70.03, 178.29 | 60.18 | 04/14/2025 | 23:51:51 | 70.04, 178.28 | 60.20 | 1.29 | 47 |
| 9 | 04/17/2025 | 14:28:08 | 70.51, -41.30 | 59.76 | 04/17/2025 | 14:29:19 | 70.41, -40.58 | 59.63 | 28.98 | 71 |
| 10 | 04/17/2025 | 15:18:45 | -70.12, 126.62 | 120.66 | 04/17/2025 | 15:18:52 | -70.14, 126.66 | 120.65 | 2.37 | 7 |
| 11 | 04/17/2025 | 16:09:28 | 69.99, -65.87 | 59.20 | 04/17/2025 | 16:08:19 | 70.03, -65.85 | 59.24 | 3.49 | 69 |
| 12 | 04/20/2025 | 06:44:51 | 70.18, 75.02 | 58.48 | 04/20/2025 | 06:45:49 | 70.19, 74.98 | 58.49 | 1.92 | 58 |
| 13 | 04/20/2025 | 07:35:34 | -70.10,-117.56 | 121.61 | 04/20/2025 | 07:35:19 | -70.09,-117.53 | 121.63 | 1.92 | 15 |
| 14 | 04/20/2025 | 08:26:05 | 69.34, 50.88 | 57.60 | 04/20/2025 | 08:24:56 | 69.42, 49.20 | 57.72 | 66.53 | 69 |
| 15 | 04/22/2025 | 23:01:41 | 70.17,-169.19 | 57.57 | 04/22/2025 | 23:02:16 | 70.14,-169.20 | 57.54 | 3.02 | 35 |
| 16 | 04/22/2025 | 23:52:23 | -70.04, -1.67 | 122.58 | 04/22/2025 | 23:51:46 | -70.04, -1.71 | 122.58 | 1.34 | 37 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/9/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9