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: 5/5/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 05/08/2025 04:03:51 -0.03, 140.76 -0.21, 140.01 85.86 80
2 05/09/2025 03:47:47 -0.03, 140.74 0.81, 144.53 431.31 80
3 05/10/2025 16:09:38 0.02, 140.72 0.36, 139.25 167.95 80
4 05/11/2025 15:48:14 0.02, 140.71 -0.66, 143.77 349.26 80
5 05/13/2025 04:10:11 -0.01, 140.69 -0.53, 138.47 254.26 80
6 05/14/2025 03:54:08 -0.01, 140.68 0.49, 142.99 263.38 80
7 05/15/2025 16:15:58 0.00, 140.64 0.67, 137.71 334.99 80
8 05/16/2025 15:54:35 0.01, 140.63 -0.35, 142.23 182.82 80
9 05/18/2025 04:16:32 -0.00, 140.61 -0.83, 136.92 419.99 80
10 05/19/2025 04:00:29 -0.01, 140.59 0.20, 141.45 98.42 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 5/5/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250506.jpg

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

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