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: 10/1/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/02/2025 15:48:37 -0.02, 140.82 -0.65, 143.69 326.88 80
2 10/04/2025 04:10:31 0.02, 140.84 -0.55, 138.40 279.52 80
3 10/05/2025 03:54:26 0.02, 140.86 0.48, 142.93 235.85 80
4 10/06/2025 16:16:12 -0.02, 140.88 0.68, 137.66 366.16 80
5 10/07/2025 15:54:45 -0.02, 140.90 -0.30, 142.21 149.35 80
6 10/09/2025 04:16:40 0.02, 140.92 -0.88, 136.91 456.48 80
7 10/10/2025 04:00:34 0.02, 140.93 0.16, 141.44 59.34 80
8 10/12/2025 16:03:33 -0.03, 140.96 0.04, 140.73 26.26 80
9 10/13/2025 15:42:08 -0.03, 140.97 -1.01, 145.26 489.76 80
10 10/15/2025 04:04:01 0.04, 140.98 -0.21, 139.98 115.16 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/1/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251002.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/01/2025 in txt file.

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