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: 9/26/2025
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, 140.76 -0.17, 139.87 100.86 80
2 09/30/2025 03:48:17 0.02, 140.78 0.85, 144.41 413.94 80
3 10/01/2025 16:10:03 -0.02, 140.85 0.34, 139.15 194.07 80
4 10/02/2025 15:48:37 -0.02, 140.87 -0.62, 143.69 320.81 80
5 10/04/2025 04:10:32 0.03, 140.85 -0.52, 138.39 280.87 80
6 10/05/2025 03:54:26 0.02, 140.86 0.51, 142.92 234.92 80
7 10/06/2025 16:16:12 -0.03, 140.92 0.72, 137.67 370.84 80
8 10/07/2025 15:54:46 -0.02, 140.93 -0.31, 142.20 144.89 80
9 10/09/2025 04:16:41 0.02, 140.91 -0.88, 136.91 456.53 80
10 10/10/2025 04:00:35 0.02, 140.92 0.15, 141.44 59.72 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/26/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250927.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/26/2025 in txt file.

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