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: 5/15/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 05/16/2025 15:54:34 0.02, 140.77 -0.30, 142.24 167.78 80
2 05/18/2025 04:16:32 -0.02, 140.78 -0.89, 136.94 437.83 80
3 05/19/2025 04:00:28 -0.02, 140.77 0.13, 141.46 78.61 80
4 05/21/2025 16:00:54 0.03, 140.75 0.05, 140.71 4.70 80
5 05/24/2025 04:04:08 -0.02, 140.74 -0.21, 139.93 92.04 80
6 05/25/2025 03:48:04 -0.02, 140.72 0.81, 144.45 425.09 80
7 05/26/2025 16:07:14 0.01, 140.70 0.38, 139.18 173.86 80
8 05/27/2025 15:48:30 0.01, 140.69 -0.65, 143.70 343.32 80
9 05/29/2025 04:10:27 -0.01, 140.68 -0.53, 138.39 260.88 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 5/15/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250516.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 05/15/2025 in txt file.

Historical Predications of SNOs between HIMAWARI-9 and NOAA-21