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: 9/9/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/10/2025 16:04:03 0.01, 140.76 0.02, 140.59 19.38 80
2 09/11/2025 15:42:38 0.01, 140.76 -0.97, 145.12 497.90 80
3 09/13/2025 04:04:33 -0.00, 140.74 -0.19, 139.82 103.77 80
4 09/14/2025 03:48:28 -0.00, 140.73 0.80, 144.36 413.63 80
5 09/15/2025 16:10:15 -0.00, 140.73 0.38, 139.09 186.74 80
6 09/16/2025 15:48:50 -0.00, 140.72 -0.68, 143.62 330.95 80
7 09/18/2025 04:10:45 0.00, 140.69 -0.54, 138.33 269.63 80
8 09/19/2025 03:54:40 0.00, 140.67 0.52, 142.85 249.03 80
9 09/20/2025 16:16:28 -0.00, 140.65 0.66, 137.58 348.80 80
10 09/21/2025 15:55:02 -0.00, 140.63 -0.34, 142.12 170.23 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/9/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250910.jpg

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

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