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: 5/8/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 05/09/2025 03:47:48 -0.00, 140.74 0.82, 144.53 430.77 80
2 05/10/2025 16:09:38 0.00, 140.71 0.34, 139.25 167.75 80
3 05/11/2025 15:48:14 0.00, 140.69 -0.67, 143.77 350.27 80
4 05/13/2025 04:10:13 -0.00, 140.66 -0.46, 138.45 251.14 80
5 05/14/2025 03:54:09 0.00, 140.64 0.55, 142.98 267.31 80
6 05/15/2025 16:15:59 -0.00, 140.60 0.66, 137.71 330.28 80
7 05/16/2025 15:54:35 -0.00, 140.58 -0.36, 142.23 188.09 80
8 05/18/2025 04:16:32 0.01, 140.54 -0.83, 136.92 412.96 80
9 05/19/2025 04:00:29 0.00, 140.51 0.19, 141.45 106.22 80
10 05/20/2025 16:22:19 0.02, 140.46 0.95, 136.16 489.26 80
11 05/21/2025 16:00:55 0.02, 140.43 -0.02, 140.70 30.21 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 5/8/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250509.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 05/08/2025 in txt file.

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