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: 9/6/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/07/2025 04:17:06 0.01, 140.77 -0.88, 136.79 453.78 80
2 09/08/2025 04:01:00 0.01, 140.76 0.12, 141.33 63.72 80
3 09/10/2025 16:04:03 -0.00, 140.74 0.02, 140.59 17.84 80
4 09/11/2025 15:42:38 -0.00, 140.74 -0.97, 145.12 499.78 80
5 09/13/2025 04:04:33 0.00, 140.72 -0.19, 139.82 102.37 80
6 09/14/2025 03:48:28 0.00, 140.71 0.81, 144.36 415.50 80
7 09/15/2025 16:10:15 -0.01, 140.69 0.37, 139.09 182.87 80
8 09/16/2025 15:48:50 -0.00, 140.68 -0.69, 143.61 335.31 80
9 09/18/2025 04:10:45 0.01, 140.65 -0.52, 138.32 265.78 80
10 09/19/2025 03:54:39 0.01, 140.63 0.49, 142.86 253.30 80
11 09/20/2025 16:16:27 -0.01, 140.59 0.69, 137.59 342.72 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/6/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250907.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/06/2025 in txt file.

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