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: 11/20/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 11/21/2025 04:10:15 -0.02, 140.76 -0.54, 138.52 255.59 80
2 11/22/2025 03:54:13 -0.02, 140.76 0.48, 143.04 259.83 80
3 11/23/2025 16:16:03 0.01, 140.78 0.69, 137.76 343.81 80
4 11/24/2025 15:54:41 0.00, 140.78 -0.33, 142.28 171.42 80
5 11/26/2025 04:16:41 -0.00, 140.76 -0.83, 136.96 432.71 80
6 11/27/2025 04:00:37 0.01, 140.76 0.14, 141.50 83.36 80
7 11/29/2025 16:03:45 -0.01, 140.76 -0.00, 140.74 2.12 80
8 12/02/2025 04:04:22 0.00, 140.72 -0.17, 139.95 88.32 80
9 12/03/2025 03:48:20 -0.00, 140.71 0.86, 144.47 428.52 80
10 12/04/2025 16:10:09 0.01, 140.71 0.37, 139.20 172.17 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 11/20/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20251121.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 11/20/2025 in txt file.

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