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: 10/20/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/21/2025 03:54:05 0.03, 140.74 0.53, 143.02 259.85 80
2 10/22/2025 16:15:50 -0.03, 140.72 0.63, 137.76 336.92 80
3 10/23/2025 15:54:23 -0.02, 140.72 -0.37, 142.31 181.30 80
4 10/25/2025 04:18:58 0.01, 140.71 -0.81, 137.01 421.42 80
5 10/26/2025 03:57:31 0.01, 140.70 0.20, 141.55 96.94 80
6 10/27/2025 16:21:55 -0.00, 140.67 1.00, 136.30 498.69 80
7 10/28/2025 16:00:30 -0.01, 140.66 -0.07, 140.83 19.91 80
8 10/31/2025 04:06:18 0.01, 140.63 -0.09, 140.07 63.22 80
9 11/01/2025 03:44:51 0.01, 140.61 0.92, 144.61 456.15 80
10 11/02/2025 16:09:16 -0.01, 140.57 0.26, 139.36 137.63 80
11 11/03/2025 15:47:49 -0.01, 140.55 -0.76, 143.90 381.99 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/20/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251021.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/20/2025 in txt file.

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