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: 3/29/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 03/31/2025 04:16:39 -0.02, 140.77 -0.88, 136.93 437.31 80
2 04/01/2025 04:00:33 -0.02, 140.77 0.15, 141.46 79.13 80
3 04/03/2025 16:03:33 0.02, 140.79 0.01, 140.73 6.15 80
4 04/06/2025 04:04:01 -0.03, 140.78 -0.22, 139.98 91.17 80
5 04/07/2025 03:47:55 -0.03, 140.77 0.83, 144.51 426.44 80
6 04/08/2025 16:09:41 0.04, 140.77 0.36, 139.25 172.38 80
7 04/09/2025 15:48:14 0.04, 140.76 -0.63, 143.79 345.67 80
8 04/11/2025 04:10:08 -0.04, 140.73 -0.53, 138.49 255.11 80
9 04/12/2025 03:54:02 -0.04, 140.72 0.47, 143.03 263.61 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 3/29/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250330.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 03/29/2025 in txt file.

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