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: 11/3/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 11/05/2025 04:09:43 -0.00, 140.71 -0.46, 138.62 237.80 80
2 11/06/2025 03:53:37 -0.00, 140.69 0.56, 143.16 281.20 80
3 11/07/2025 16:15:21 0.00, 140.66 0.61, 137.90 314.06 80
4 11/08/2025 15:53:54 0.01, 140.65 -0.41, 142.44 205.03 80
5 11/10/2025 04:15:48 -0.02, 140.63 -0.81, 137.16 396.30 80
6 11/11/2025 03:59:41 -0.00, 140.61 0.21, 141.70 123.14 80
7 11/12/2025 16:21:26 -0.00, 140.56 0.95, 136.44 470.36 80
8 11/13/2025 16:00:00 -0.01, 140.53 -0.13, 140.97 49.84 80
9 11/16/2025 04:03:07 0.00, 140.47 -0.05, 140.22 28.83 80
10 11/17/2025 03:47:00 0.00, 140.44 0.98, 144.75 492.38 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/3/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251104.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/03/2025 in txt file.

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