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: 8/3/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/04/2025 15:55:15 0.00, 140.77 -0.26, 142.07 148.24 80
2 08/06/2025 04:17:12 -0.01, 140.78 -0.89, 136.76 457.30 80
3 08/07/2025 04:01:07 -0.01, 140.78 0.08, 141.30 58.73 80
4 08/09/2025 16:04:10 0.02, 140.79 0.05, 140.55 26.26 80
5 08/10/2025 15:42:45 0.02, 140.79 -0.92, 145.10 490.18 80
6 08/12/2025 04:04:41 -0.02, 140.79 -0.27, 139.79 113.89 80
7 08/13/2025 03:48:37 -0.02, 140.78 0.76, 144.32 403.03 80
8 08/14/2025 16:10:25 0.03, 140.77 0.39, 139.05 196.52 80
9 08/15/2025 15:49:01 0.03, 140.77 -0.63, 143.57 320.32 80
10 08/17/2025 04:10:56 -0.03, 140.76 -0.59, 138.28 283.38 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/3/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250804.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/03/2025 in txt file.

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