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: 10/15/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/16/2025 03:47:57 0.02, 140.77 0.87, 144.50 425.52 80
2 10/17/2025 16:09:42 -0.02, 140.76 0.31, 139.24 172.88 80
3 10/18/2025 15:48:16 -0.02, 140.76 -0.69, 143.78 344.47 80
4 10/20/2025 04:10:10 0.03, 140.76 -0.50, 138.49 259.23 80
5 10/21/2025 03:54:05 0.03, 140.75 0.55, 143.02 258.67 80
6 10/22/2025 16:15:49 -0.03, 140.73 0.66, 137.77 338.19 80
7 10/23/2025 15:54:24 -0.03, 140.72 -0.40, 142.30 179.82 80
8 10/25/2025 04:16:18 0.02, 140.72 -0.78, 137.00 423.18 80
9 10/26/2025 04:00:11 0.02, 140.71 0.22, 141.55 95.20 80
10 10/28/2025 16:00:29 -0.02, 140.67 -0.03, 140.84 18.32 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/15/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251016.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/15/2025 in txt file.

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