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: 11/14/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 11/16/2025 04:03:51 0.01, 140.79 -0.18, 140.06 84.48 80
2 11/17/2025 03:47:48 0.00, 140.79 0.84, 144.58 431.29 80
3 11/18/2025 16:09:38 0.01, 140.78 0.34, 139.30 168.68 80
4 11/19/2025 15:48:16 0.01, 140.78 -0.69, 143.82 347.02 80
5 11/21/2025 04:10:15 -0.02, 140.79 -0.54, 138.52 259.38 80
6 11/22/2025 03:54:13 -0.01, 140.78 0.49, 143.04 256.71 80
7 11/23/2025 16:16:03 0.02, 140.76 0.68, 137.76 342.37 80
8 11/24/2025 15:54:41 0.01, 140.76 -0.35, 142.28 173.77 80
9 11/26/2025 04:19:20 -0.01, 140.76 -0.85, 136.97 431.93 80
10 11/27/2025 04:00:36 -0.01, 140.75 0.13, 141.50 84.98 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/14/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251115.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/14/2025 in txt file.

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