Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between HIMAWARI-9 and NOAA-21 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/11/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 10/12/2025 | 16:03:35 | -0.02, 140.74 | -0.03, 140.72 | 3.19 | 80 |
| 2 | 10/15/2025 | 04:04:03 | 0.02, 140.77 | -0.18, 139.97 | 91.82 | 80 |
| 3 | 10/16/2025 | 03:47:57 | 0.02, 140.77 | 0.87, 144.50 | 425.28 | 80 |
| 4 | 10/17/2025 | 16:09:42 | -0.03, 140.75 | 0.31, 139.24 | 172.40 | 80 |
| 5 | 10/18/2025 | 15:48:16 | -0.03, 140.75 | -0.68, 143.78 | 345.26 | 80 |
| 6 | 10/20/2025 | 04:10:10 | 0.03, 140.75 | -0.51, 138.49 | 258.46 | 80 |
| 7 | 10/21/2025 | 03:54:05 | 0.02, 140.74 | 0.54, 143.02 | 259.80 | 80 |
| 8 | 10/22/2025 | 16:15:50 | -0.02, 140.71 | 0.62, 137.76 | 336.19 | 80 |
| 9 | 10/23/2025 | 15:54:24 | -0.02, 140.70 | -0.37, 142.30 | 182.12 | 80 |
| 10 | 10/25/2025 | 04:16:18 | 0.02, 140.70 | -0.81, 137.01 | 421.12 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/11/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/11/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21