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: 10/12/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/15/2025 04:04:03 0.02, 140.77 -0.14, 139.96 92.33 80
2 10/16/2025 03:47:57 0.02, 140.78 0.85, 144.50 424.44 80
3 10/17/2025 16:09:42 -0.03, 140.77 0.33, 139.24 173.88 80
4 10/18/2025 15:48:17 -0.02, 140.77 -0.72, 143.77 343.43 80
5 10/20/2025 04:10:11 0.03, 140.77 -0.47, 138.48 260.59 80
6 10/21/2025 03:54:05 0.02, 140.76 0.53, 143.02 257.30 80
7 10/22/2025 16:15:50 -0.03, 140.74 0.64, 137.76 339.38 80
8 10/23/2025 15:54:23 -0.03, 140.74 -0.36, 142.30 178.52 80
9 10/25/2025 04:16:18 0.03, 140.74 -0.82, 137.01 425.15 80
10 10/26/2025 04:00:12 0.04, 140.73 0.24, 141.54 93.12 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/12/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251013.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/12/2025 in txt file.

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