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: 9/8/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/10/2025 16:04:03 -0.03, 140.74 0.01, 140.58 18.35 80
2 09/11/2025 15:42:38 -0.03, 140.74 -0.98, 145.12 499.27 80
3 09/13/2025 04:04:33 0.03, 140.72 -0.18, 139.82 102.97 80
4 09/14/2025 03:48:28 0.03, 140.71 0.82, 144.36 414.87 80
5 09/15/2025 16:10:16 -0.04, 140.69 0.31, 139.08 183.73 80
6 09/16/2025 15:48:51 -0.04, 140.68 -0.69, 143.61 334.39 80
7 09/18/2025 04:10:46 0.05, 140.65 -0.46, 138.31 266.84 80
8 09/19/2025 03:54:41 0.05, 140.63 0.54, 142.85 252.20 80
9 09/20/2025 16:16:28 -0.05, 140.59 0.63, 137.58 343.99 80
10 09/21/2025 15:55:02 -0.05, 140.57 -0.37, 142.11 175.58 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/8/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250909.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/08/2025 in txt file.

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