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: 10/13/2025
| Index | Date | Time (HIMAWARI-9) | HIMAWARI-9 Lat,Lon | NOAA-21 Lat,Lon | Distance(km) | Time Diff (sec) |
| 1 | 10/15/2025 | 04:04:03 | 0.02, 140.76 | -0.14, 139.96 | 90.62 | 80 |
| 2 | 10/16/2025 | 03:47:57 | 0.02, 140.76 | 0.84, 144.50 | 426.72 | 80 |
| 3 | 10/17/2025 | 16:09:42 | -0.03, 140.74 | 0.34, 139.25 | 171.03 | 80 |
| 4 | 10/18/2025 | 15:48:17 | -0.02, 140.73 | -0.71, 143.78 | 346.88 | 80 |
| 5 | 10/20/2025 | 04:10:11 | 0.02, 140.73 | -0.47, 138.48 | 255.88 | 80 |
| 6 | 10/21/2025 | 03:54:04 | 0.02, 140.72 | 0.52, 143.03 | 262.59 | 80 |
| 7 | 10/22/2025 | 16:15:50 | -0.03, 140.69 | 0.64, 137.77 | 333.55 | 80 |
| 8 | 10/23/2025 | 15:54:24 | -0.03, 140.68 | -0.41, 142.29 | 184.93 | 80 |
| 9 | 10/25/2025 | 04:16:19 | 0.03, 140.67 | -0.77, 137.00 | 417.49 | 80 |
| 10 | 10/26/2025 | 04:00:12 | 0.04, 140.65 | 0.23, 141.54 | 101.33 | 80 |
| 11 | 10/27/2025 | 16:21:57 | -0.04, 140.61 | 0.92, 136.28 | 493.72 | 80 |
Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/13/2025
Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/13/2025 in txt file.
Historical Predications of SNOs between HIMAWARI-9 and NOAA-21