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: 9/13/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/14/2025 03:48:28 0.01, 140.74 0.80, 144.36 412.24 80
2 09/15/2025 16:10:15 -0.02, 140.84 0.39, 139.10 199.32 80
3 09/16/2025 15:48:49 -0.02, 140.87 -0.61, 143.63 314.83 80
4 09/18/2025 04:10:45 0.02, 140.83 -0.55, 138.33 285.45 80
5 09/19/2025 03:54:39 0.02, 140.85 0.45, 142.87 229.87 80
6 09/20/2025 16:16:26 -0.03, 140.92 0.73, 137.60 378.79 80
7 09/21/2025 15:55:01 -0.02, 140.93 -0.27, 142.14 136.72 80
8 09/23/2025 04:16:56 0.02, 140.89 -0.88, 136.83 462.50 80
9 09/24/2025 04:00:51 0.02, 140.90 0.12, 141.37 53.85 80
10 09/26/2025 16:03:53 -0.02, 140.96 0.05, 140.64 36.63 80
11 09/27/2025 15:42:27 -0.02, 140.97 -0.96, 145.17 479.47 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/13/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250914.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/13/2025 in txt file.

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