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: 7/4/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 07/05/2025 04:17:05 -0.01, 140.74 -0.87, 136.79 450.50 80
2 07/06/2025 04:01:01 -0.00, 140.75 0.13, 141.32 64.84 80
3 07/08/2025 16:04:05 -0.01, 140.76 0.02, 140.58 20.83 80
4 07/09/2025 15:42:40 -0.01, 140.77 -0.98, 145.11 494.75 80
5 07/11/2025 04:04:37 0.01, 140.78 -0.22, 139.80 111.51 80
6 07/12/2025 03:48:33 0.00, 140.78 0.79, 144.33 404.70 80
7 07/13/2025 16:10:21 0.00, 140.77 0.35, 139.06 194.72 80
8 07/14/2025 15:48:57 0.00, 140.77 -0.65, 143.59 321.75 80
9 07/16/2025 04:10:54 -0.00, 140.77 -0.54, 138.28 283.55 80
10 07/17/2025 03:54:50 -0.00, 140.77 0.46, 142.81 233.48 80
11 07/18/2025 16:16:37 0.01, 140.74 0.74, 137.55 364.59 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 7/4/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250705.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 07/04/2025 in txt file.

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