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: 12/2/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 12/03/2025 03:48:18 -0.04, 140.71 0.82, 144.48 430.68 80
2 12/04/2025 16:10:09 0.03, 140.71 0.34, 139.20 171.53 80
3 12/05/2025 15:48:45 0.04, 140.70 -0.64, 143.74 345.52 80
4 12/07/2025 04:10:45 -0.03, 140.66 -0.55, 138.42 254.91 80
5 12/08/2025 03:54:42 -0.03, 140.64 0.50, 142.94 262.95 80
6 12/09/2025 16:16:32 0.02, 140.63 0.66, 137.66 337.31 80
7 12/10/2025 15:55:09 0.02, 140.60 -0.32, 142.19 180.91 80
8 12/12/2025 04:17:08 -0.02, 140.54 -0.84, 136.88 417.91 80
9 12/13/2025 04:01:05 -0.02, 140.51 0.16, 141.41 101.35 80
10 12/14/2025 16:22:55 0.02, 140.48 1.01, 136.13 496.52 80
11 12/15/2025 16:01:33 0.02, 140.45 -0.05, 140.65 22.77 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 12/2/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251203.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 12/02/2025 in txt file.

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