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: 4/29/2025
| 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 | 04/30/2025 | 23:01:49 | -70.13, 10.83 | 125.03 | 04/30/2025 | 23:02:15 | -70.16, 10.81 | 125.00 | 3.20 | 26 |
| 2 | 04/30/2025 | 23:52:33 | 70.03, 178.30 | 54.86 | 04/30/2025 | 23:51:42 | 70.05, 178.30 | 54.89 | 2.81 | 51 |
| 3 | 05/03/2025 | 14:28:04 | 70.20, -40.84 | 54.26 | 05/03/2025 | 14:29:13 | 70.22, -40.86 | 54.28 | 2.69 | 69 |
| 4 | 05/03/2025 | 15:18:46 | -70.09, 126.65 | 125.87 | 05/03/2025 | 15:18:43 | -70.11, 126.62 | 125.85 | 2.67 | 3 |
| 5 | 05/03/2025 | 16:09:26 | 69.78, -65.57 | 53.81 | 05/03/2025 | 16:08:14 | 69.78, -66.19 | 53.83 | 24.01 | 72 |
| 6 | 05/06/2025 | 06:45:02 | 70.17, 74.97 | 53.47 | 05/06/2025 | 06:45:41 | 70.19, 74.98 | 53.48 | 2.31 | 39 |
| 7 | 05/06/2025 | 07:35:44 | -70.06,-117.55 | 126.66 | 05/06/2025 | 07:35:11 | -70.08,-117.54 | 126.64 | 2.29 | 33 |
| 8 | 05/08/2025 | 22:11:25 | -70.72, 22.53 | 126.69 | 05/08/2025 | 22:12:35 | -70.61, 23.84 | 126.83 | 49.62 | 70 |
| 9 | 05/08/2025 | 23:01:59 | 70.10,-169.17 | 52.66 | 05/08/2025 | 23:02:09 | 70.12,-169.24 | 52.68 | 3.57 | 10 |
| 10 | 05/08/2025 | 23:52:41 | -69.99, -1.69 | 127.46 | 05/08/2025 | 23:51:39 | -70.01, -1.76 | 127.44 | 3.52 | 62 |
| 11 | 05/11/2025 | 14:28:13 | -70.19, 139.13 | 127.93 | 05/11/2025 | 14:29:09 | -70.18, 139.08 | 127.95 | 2.58 | 56 |
| 12 | 05/11/2025 | 15:18:57 | 70.09, -53.40 | 51.96 | 05/11/2025 | 15:18:36 | 70.06, -53.43 | 51.93 | 3.39 | 21 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/29/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/29/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9