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: 7/24/2025
| 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 | 07/25/2025 | 05:55:13 | -70.40, -92.94 | 129.17 | 07/25/2025 | 05:56:25 | -70.30, -92.37 | 129.31 | 24.11 | 72 |
| 2 | 07/25/2025 | 06:45:52 | 70.04, 74.93 | 50.45 | 07/25/2025 | 06:45:55 | 70.03, 74.88 | 50.44 | 2.02 | 3 |
| 3 | 07/25/2025 | 07:36:34 | -69.93,-117.59 | 129.65 | 07/25/2025 | 07:35:25 | -69.92,-117.63 | 129.65 | 2.03 | 69 |
| 4 | 07/27/2025 | 22:12:03 | -70.10, 23.30 | 128.90 | 07/27/2025 | 22:12:58 | -70.12, 23.25 | 128.88 | 3.12 | 55 |
| 5 | 07/27/2025 | 23:02:47 | 70.00,-169.25 | 51.02 | 07/27/2025 | 23:02:25 | 70.01,-169.26 | 51.03 | 1.24 | 22 |
| 6 | 07/27/2025 | 23:53:15 | -69.15, -0.69 | 129.87 | 07/27/2025 | 23:52:07 | -69.25, -2.67 | 129.69 | 78.80 | 68 |
| 7 | 07/30/2025 | 14:28:57 | -70.06, 139.12 | 128.30 | 07/30/2025 | 14:29:27 | -70.09, 139.09 | 128.28 | 3.18 | 30 |
| 8 | 07/30/2025 | 15:19:41 | 69.97, -53.43 | 51.62 | 07/30/2025 | 15:18:54 | 69.98, -53.43 | 51.63 | 0.38 | 47 |
| 9 | 08/02/2025 | 05:55:13 | 70.31, 87.19 | 52.63 | 08/02/2025 | 05:56:25 | 70.25, 87.56 | 52.54 | 15.92 | 72 |
| 10 | 08/02/2025 | 06:45:52 | -70.03,-105.06 | 127.66 | 08/02/2025 | 06:45:57 | -70.04,-105.10 | 127.65 | 1.64 | 5 |
| 11 | 08/02/2025 | 07:36:36 | 69.95, 62.38 | 52.27 | 08/02/2025 | 07:35:24 | 69.92, 62.38 | 52.25 | 3.06 | 72 |
| 12 | 08/04/2025 | 22:12:05 | 70.13,-156.76 | 53.15 | 08/04/2025 | 22:12:56 | 70.12,-156.73 | 53.12 | 2.09 | 51 |
| 13 | 08/04/2025 | 23:02:47 | -70.01, 10.75 | 126.98 | 08/04/2025 | 23:02:26 | -70.02, 10.76 | 126.97 | 1.65 | 21 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/24/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/24/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9