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: 10/9/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 10/10/2025 04:00:35 0.01, 140.62 0.17, 141.44 93.85 80
2 10/12/2025 16:00:55 -0.01, 140.59 -0.01, 140.72 13.94 80
3 10/15/2025 04:04:04 0.01, 140.43 -0.08, 139.94 54.72 80
4 10/16/2025 03:47:58 0.01, 140.38 0.91, 144.49 467.48 80
5 10/17/2025 16:09:44 -0.01, 140.37 0.22, 139.22 130.88 80
6 10/18/2025 15:48:18 -0.01, 140.32 -0.77, 143.76 391.48 80
7 10/20/2025 04:10:13 0.01, 140.18 -0.36, 138.45 196.76 80
8 10/21/2025 03:54:07 0.01, 140.13 0.64, 143.00 326.59 80
9 10/22/2025 16:15:52 -0.01, 140.10 0.54, 137.74 269.40 80
10 10/23/2025 15:54:26 -0.00, 140.05 -0.52, 142.27 253.58 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 10/9/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251010.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 10/09/2025 in txt file.

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