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: 11/25/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 11/26/2025 04:16:40 -0.02, 140.80 -0.89, 136.98 435.89 80
2 11/27/2025 04:00:37 -0.01, 140.82 0.14, 141.50 77.20 80
3 11/29/2025 16:03:44 0.01, 140.86 0.06, 140.75 13.12 80
4 12/02/2025 04:04:21 -0.02, 140.92 -0.23, 139.96 109.22 80
5 12/03/2025 03:48:17 -0.02, 140.94 0.75, 144.50 404.65 80
6 12/04/2025 16:10:08 0.03, 140.95 0.42, 139.22 197.93 80
7 12/05/2025 15:48:45 0.02, 140.97 -0.62, 143.74 315.75 80
8 12/07/2025 04:10:44 -0.03, 141.01 -0.63, 138.44 293.94 80
9 12/08/2025 03:54:41 -0.02, 141.02 0.41, 142.96 220.44 80
10 12/09/2025 16:16:31 0.03, 141.02 0.76, 137.68 380.45 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/25/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251126.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/25/2025 in txt file.

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