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: 6/12/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 06/14/2025 04:10:40 0.02, 140.77 -0.53, 138.34 276.84 80
2 06/15/2025 03:54:36 0.02, 140.77 0.51, 142.87 239.69 80
3 06/16/2025 16:16:24 -0.02, 140.76 0.67, 137.60 360.50 80
4 06/17/2025 15:55:00 -0.01, 140.76 -0.32, 142.13 156.30 80
5 06/19/2025 04:16:57 0.02, 140.75 -0.89, 136.82 447.80 80
6 06/20/2025 04:00:54 0.01, 140.74 0.16, 141.34 69.47 80
7 06/22/2025 16:01:18 -0.02, 140.71 0.02, 140.61 12.58 80
8 06/25/2025 04:04:31 0.03, 140.69 -0.17, 139.82 98.85 80
9 06/26/2025 03:48:27 0.02, 140.67 0.82, 144.35 419.02 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 6/12/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250613.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 06/12/2025 in txt file.

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