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: 10/16/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/17/2025 16:09:42 -0.02, 140.75 0.31, 139.24 172.01 80
2 10/18/2025 15:48:16 -0.02, 140.75 -0.68, 143.78 345.57 80
3 10/20/2025 04:10:10 0.02, 140.75 -0.50, 138.49 257.86 80
4 10/21/2025 03:54:05 0.02, 140.74 0.55, 143.02 260.25 80
5 10/22/2025 16:15:49 0.01, 140.72 0.67, 137.77 335.40 80
6 10/23/2025 15:54:23 0.01, 140.71 -0.33, 142.31 182.76 80
7 10/25/2025 04:16:17 -0.02, 140.70 -0.85, 137.02 420.10 80
8 10/26/2025 04:00:10 -0.01, 140.69 0.16, 141.56 98.41 80
9 10/27/2025 16:21:56 0.02, 140.66 0.99, 136.30 496.94 80
10 10/28/2025 16:00:29 0.01, 140.65 -0.02, 140.84 21.70 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/16/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251017.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/16/2025 in txt file.

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