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: 10/25/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/26/2025 04:00:11 0.00, 140.76 0.16, 141.56 90.67 80
2 10/28/2025 16:00:29 -0.01, 140.76 -0.02, 140.84 8.76 80
3 10/31/2025 04:03:37 0.02, 140.79 -0.14, 140.09 80.65 80
4 11/01/2025 03:47:31 0.02, 140.79 0.87, 144.63 436.63 80
5 11/02/2025 16:09:15 -0.02, 140.77 0.31, 139.37 159.80 80
6 11/03/2025 15:47:49 -0.02, 140.77 -0.70, 143.91 357.80 80
7 11/05/2025 04:09:43 0.02, 140.79 -0.46, 138.62 247.29 80
8 11/06/2025 03:53:36 0.02, 140.78 0.56, 143.15 270.41 80
9 11/07/2025 16:15:21 -0.03, 140.76 0.62, 137.90 325.54 80
10 11/08/2025 15:53:54 -0.03, 140.75 -0.41, 142.44 192.26 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/25/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251026.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/25/2025 in txt file.

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