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: 9/26/2025
| 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 | 09/27/2025 | 06:45:35 | 70.06, 74.96 | 71.72 | 09/27/2025 | 06:46:19 | 70.07, 74.90 | 71.72 | 2.49 | 44 |
| 2 | 09/27/2025 | 07:36:17 | -69.99,-117.61 | 108.34 | 09/27/2025 | 07:35:48 | -70.01,-117.55 | 108.33 | 2.94 | 29 |
| 3 | 09/29/2025 | 22:12:00 | -71.04, 21.86 | 106.26 | 09/29/2025 | 22:13:06 | -70.98, 24.50 | 106.34 | 95.85 | 66 |
| 4 | 09/29/2025 | 23:02:28 | 70.07,-169.27 | 72.77 | 09/29/2025 | 23:02:48 | 70.06,-169.23 | 72.75 | 2.19 | 20 |
| 5 | 09/29/2025 | 23:53:09 | -69.95, -1.77 | 107.34 | 09/29/2025 | 23:52:18 | -69.95, -1.75 | 107.35 | 0.99 | 51 |
| 6 | 10/02/2025 | 14:28:37 | -70.23, 138.96 | 106.05 | 10/02/2025 | 14:29:49 | -70.17, 139.17 | 106.12 | 10.36 | 72 |
| 7 | 10/02/2025 | 15:19:19 | 69.99, -53.36 | 73.72 | 10/02/2025 | 15:19:17 | 70.01, -53.41 | 73.74 | 2.86 | 2 |
| 8 | 10/02/2025 | 16:10:00 | -69.87, 114.14 | 106.39 | 10/02/2025 | 16:08:47 | -69.90, 114.07 | 106.36 | 4.11 | 73 |
| 9 | 10/05/2025 | 06:45:26 | -70.11,-105.06 | 105.15 | 10/05/2025 | 06:46:17 | -70.08,-105.06 | 105.17 | 2.72 | 51 |
| 10 | 10/05/2025 | 07:36:10 | 69.97, 62.45 | 74.74 | 10/05/2025 | 07:35:44 | 69.97, 62.42 | 74.73 | 1.03 | 26 |
| 11 | 10/05/2025 | 08:26:35 | -69.01,-128.84 | 106.23 | 10/05/2025 | 08:25:28 | -69.09,-131.13 | 106.13 | 91.64 | 67 |
| 12 | 10/07/2025 | 23:02:17 | -70.05, 10.81 | 104.18 | 10/07/2025 | 23:02:44 | -70.06, 10.80 | 104.17 | 1.76 | 27 |
| 13 | 10/07/2025 | 23:53:02 | 69.97, 178.24 | 75.75 | 10/07/2025 | 23:52:11 | 69.95, 178.28 | 75.73 | 2.50 | 51 |
| 14 | 10/10/2025 | 14:28:29 | 70.23, -40.99 | 77.01 | 10/10/2025 | 14:29:39 | 70.21, -40.72 | 76.99 | 10.40 | 70 |
| 15 | 10/10/2025 | 15:19:08 | -70.00, 126.67 | 103.21 | 10/10/2025 | 15:19:11 | -70.00, 126.61 | 103.21 | 2.36 | 3 |
| 16 | 10/10/2025 | 16:09:51 | 69.81, -65.74 | 76.62 | 10/10/2025 | 16:08:39 | 69.83, -65.99 | 76.63 | 9.62 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/26/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/26/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9