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: 9/15/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/15/2025 16:10:15 -0.03, 140.78 0.35, 139.09 192.57 80
2 09/16/2025 15:48:50 -0.03, 140.76 -0.65, 143.63 325.98 80
3 09/18/2025 04:10:45 0.04, 140.66 -0.51, 138.32 267.35 80
4 09/19/2025 03:54:41 0.03, 140.64 0.55, 142.85 252.39 80
5 09/20/2025 16:16:28 -0.04, 140.65 0.63, 137.58 349.67 80
6 09/21/2025 15:55:03 -0.04, 140.62 -0.37, 142.12 170.27 80
7 09/23/2025 04:16:58 0.04, 140.52 -0.78, 136.81 421.88 80
8 09/24/2025 04:00:52 0.04, 140.48 0.22, 141.35 98.91 80
9 09/26/2025 16:01:14 -0.03, 140.44 -0.06, 140.62 19.43 80
10 09/29/2025 04:04:24 0.04, 140.30 -0.08, 139.85 51.76 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/15/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250916.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/15/2025 in txt file.

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