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: 9/28/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/29/2025 04:04:22 0.02, 140.73 -0.20, 139.88 97.74 80
2 09/30/2025 03:48:16 0.02, 140.75 0.82, 144.41 417.19 80
3 10/01/2025 16:10:03 -0.03, 140.82 0.37, 139.15 190.90 80
4 10/02/2025 15:48:37 -0.03, 140.84 -0.65, 143.69 324.09 80
5 10/04/2025 04:10:32 0.03, 140.82 -0.49, 138.38 277.18 80
6 10/05/2025 03:54:26 0.03, 140.83 0.48, 142.93 238.71 80
7 10/06/2025 16:16:12 -0.04, 140.88 0.69, 137.66 367.09 80
8 10/07/2025 15:54:47 -0.03, 140.90 -0.34, 142.20 148.75 80
9 10/09/2025 04:16:41 0.03, 140.87 -0.85, 136.90 452.26 80
10 10/10/2025 04:00:35 0.03, 140.88 0.13, 141.45 64.13 80
11 10/12/2025 16:03:34 -0.03, 140.93 0.04, 140.72 24.63 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/28/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250929.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/28/2025 in txt file.

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