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: 10/29/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/31/2025 04:03:38 0.00, 140.74 -0.12, 140.08 74.34 80
2 11/01/2025 03:47:31 0.00, 140.73 0.89, 144.62 444.28 80
3 11/02/2025 16:09:15 -0.00, 140.69 0.30, 139.37 150.82 80
4 11/03/2025 15:47:49 -0.00, 140.68 -0.72, 143.91 367.99 80
5 11/05/2025 04:09:43 0.00, 140.67 -0.45, 138.61 234.47 80
6 11/06/2025 03:53:37 -0.00, 140.66 0.57, 143.15 284.60 80
7 11/07/2025 16:15:21 0.00, 140.62 0.61, 137.90 309.83 80
8 11/08/2025 15:53:55 -0.00, 140.60 -0.41, 142.44 209.17 80
9 11/10/2025 04:15:49 0.02, 140.59 -0.75, 137.14 393.39 80
10 11/11/2025 03:59:42 0.02, 140.57 0.28, 141.68 126.36 80
11 11/12/2025 16:21:27 -0.03, 140.52 0.89, 136.42 466.22 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/29/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251030.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/29/2025 in txt file.

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