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: 4/1/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 04/03/2025 16:03:32 0.03, 140.79 0.04, 140.74 5.32 80
2 04/06/2025 04:04:01 -0.04, 140.78 -0.20, 139.98 91.35 80
3 04/07/2025 03:47:55 -0.04, 140.78 0.78, 144.52 426.22 80
4 04/08/2025 16:09:41 0.05, 140.77 0.36, 139.25 172.66 80
5 04/09/2025 15:48:15 0.05, 140.76 -0.63, 143.79 345.37 80
6 04/11/2025 04:10:09 -0.05, 140.74 -0.54, 138.49 255.63 80
7 04/12/2025 03:54:02 -0.05, 140.72 0.45, 143.03 263.03 80
8 04/13/2025 16:15:49 0.05, 140.70 0.69, 137.76 334.24 80
9 04/14/2025 15:54:22 0.05, 140.68 -0.31, 142.30 184.51 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 4/1/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250402.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 04/01/2025 in txt file.

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