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: 11/12/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 11/13/2025 16:00:33 -0.01, 140.79 -0.02, 140.85 6.60 80
2 11/16/2025 04:03:51 0.01, 140.80 -0.15, 140.05 85.58 80
3 11/17/2025 03:47:49 0.00, 140.80 0.87, 144.57 430.13 80
4 11/18/2025 16:09:38 0.01, 140.79 0.36, 139.31 169.81 80
5 11/19/2025 15:48:15 0.01, 140.79 -0.66, 143.83 345.86 80
6 11/21/2025 04:10:16 -0.02, 140.80 -0.50, 138.51 260.70 80
7 11/22/2025 03:54:12 -0.01, 140.80 0.47, 143.04 255.38 80
8 11/23/2025 16:16:02 0.02, 140.78 0.69, 137.76 343.62 80
9 11/24/2025 15:54:40 0.01, 140.77 -0.34, 142.28 172.47 80
10 11/26/2025 04:19:19 -0.02, 140.77 -0.86, 136.97 433.37 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/12/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251113.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/12/2025 in txt file.

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