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: 6/13/2025
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 -0.52, 138.34 276.78 80
2 06/15/2025 03:54:35 0.02, 140.77 0.47, 142.88 239.78 80
3 06/16/2025 16:16:24 -0.02, 140.76 0.71, 137.60 360.47 80
4 06/17/2025 15:55:00 -0.01, 140.76 -0.34, 142.13 156.38 80
5 06/19/2025 04:16:57 0.02, 140.74 -0.87, 136.82 447.50 80
6 06/20/2025 04:00:54 0.02, 140.73 0.18, 141.34 69.87 80
7 06/22/2025 16:03:58 -0.03, 140.71 -0.01, 140.60 12.00 80
8 06/25/2025 04:04:32 0.03, 140.68 -0.14, 139.81 98.24 80
9 06/26/2025 03:48:27 0.03, 140.67 0.86, 144.35 419.70 80
10 06/27/2025 16:10:15 -0.04, 140.63 0.30, 139.07 177.79 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 6/13/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250614.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 06/13/2025 in txt file.

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