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: 6/29/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 06/30/2025 04:10:48 0.02, 140.75 -0.53, 138.31 278.07 80
2 07/01/2025 03:54:44 0.02, 140.73 0.47, 142.84 239.32 80
3 07/02/2025 16:16:32 -0.02, 140.71 0.68, 137.56 359.15 80
4 07/03/2025 15:55:08 -0.03, 140.70 -0.31, 142.10 158.48 80
5 07/05/2025 04:17:06 0.03, 140.68 -0.83, 136.78 444.46 80
6 07/06/2025 04:01:01 0.03, 140.66 0.16, 141.31 73.51 80
7 07/08/2025 16:04:05 -0.04, 140.62 -0.02, 140.57 6.19 80
8 07/11/2025 04:04:39 0.05, 140.57 -0.13, 139.78 90.19 80
9 07/12/2025 03:48:35 0.05, 140.55 0.88, 144.31 428.48 80
10 07/13/2025 16:10:23 -0.06, 140.51 0.27, 139.04 167.73 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 6/29/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250630.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 06/29/2025 in txt file.

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