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: 4/22/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 04/23/2025 03:47:28 -0.02, 140.75 0.82, 144.62 439.98 80
2 04/24/2025 16:09:13 0.02, 140.74 0.35, 139.36 158.73 80
3 04/25/2025 15:47:47 0.02, 140.74 -0.67, 143.89 359.51 80
4 04/27/2025 04:09:40 -0.01, 140.71 -0.49, 138.60 240.89 80
5 04/28/2025 03:53:34 -0.01, 140.70 0.54, 143.13 277.74 80
6 04/29/2025 16:15:19 0.01, 140.68 0.63, 137.87 320.03 80
7 04/30/2025 15:53:52 0.01, 140.67 -0.40, 142.41 198.59 80
8 05/02/2025 04:15:45 -0.01, 140.64 -0.80, 137.12 401.26 80
9 05/03/2025 03:59:38 -0.01, 140.62 0.24, 141.66 118.23 80
10 05/04/2025 16:21:23 0.02, 140.59 0.98, 136.41 477.54 80
11 05/05/2025 15:59:56 0.02, 140.57 -0.06, 140.94 42.35 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 4/22/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250423.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 04/22/2025 in txt file.

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