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: 11/13/2025
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, 140.80 -0.16, 140.05 85.51 80
2 11/17/2025 03:47:48 0.00, 140.80 0.86, 144.58 430.20 80
3 11/18/2025 16:09:38 0.01, 140.79 0.37, 139.31 169.71 80
4 11/19/2025 15:48:15 0.01, 140.79 -0.66, 143.83 345.99 80
5 11/21/2025 04:10:15 -0.02, 140.80 -0.50, 138.51 260.55 80
6 11/22/2025 03:54:12 -0.01, 140.80 0.48, 143.04 255.56 80
7 11/23/2025 16:16:02 0.02, 140.78 0.68, 137.76 343.38 80
8 11/24/2025 15:54:39 0.01, 140.77 -0.30, 142.29 172.77 80
9 11/26/2025 04:19:18 -0.02, 140.77 -0.89, 136.98 433.06 80
10 11/27/2025 03:57:56 -0.01, 140.76 0.16, 141.50 83.81 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/13/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251114.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/13/2025 in txt file.

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