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
SNOs_Map_HIMAWARI-9_NOAA-21_20251012.jpg

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