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: 10/4/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/05/2025 03:54:26 0.03, 140.75 0.52, 142.92 247.75 80
2 10/06/2025 16:16:13 -0.03, 140.71 0.64, 137.66 347.46 80
3 10/07/2025 15:54:46 -0.03, 140.68 -0.34, 142.20 172.23 80
4 10/09/2025 04:16:41 0.03, 140.65 -0.79, 136.89 427.59 80
5 10/10/2025 04:00:35 0.03, 140.62 0.19, 141.44 92.35 80
6 10/12/2025 16:00:56 -0.04, 140.55 -0.10, 140.70 18.10 80
7 10/15/2025 04:04:04 0.05, 140.48 -0.08, 139.95 60.83 80
8 10/16/2025 03:47:58 0.05, 140.44 0.97, 144.48 460.26 80
9 10/17/2025 16:09:43 -0.05, 140.37 0.20, 139.22 131.60 80
10 10/18/2025 15:48:17 -0.05, 140.33 -0.80, 143.76 389.98 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/4/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251005.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/04/2025 in txt file.

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