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: 8/29/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/30/2025 16:10:22 0.00, 140.75 0.40, 139.06 192.52 80
2 08/31/2025 15:48:58 0.00, 140.76 -0.64, 143.59 323.06 80
3 09/02/2025 04:10:53 0.00, 140.78 -0.55, 138.29 283.23 80
4 09/03/2025 03:54:48 0.00, 140.78 0.44, 142.83 232.86 80
5 09/04/2025 16:16:36 -0.00, 140.78 0.71, 137.55 367.05 80
6 09/05/2025 15:55:10 0.00, 140.78 -0.28, 142.09 149.36 80
7 09/07/2025 04:17:06 -0.00, 140.79 -0.89, 136.79 455.61 80
8 09/08/2025 04:01:00 -0.00, 140.78 0.10, 141.33 61.41 80
9 09/10/2025 16:04:03 0.00, 140.76 0.05, 140.59 19.96 80
10 09/11/2025 15:42:39 0.00, 140.76 -1.00, 145.11 497.25 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/29/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250830.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/29/2025 in txt file.

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