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: 7/22/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 07/24/2025 16:04:10 -0.05, 140.79 -0.02, 140.55 26.65 80
2 07/25/2025 15:42:45 -0.05, 140.78 -1.03, 145.08 490.77 80
3 07/27/2025 04:04:43 0.05, 140.73 -0.14, 139.77 108.86 80
4 07/28/2025 03:48:38 0.05, 140.71 0.87, 144.30 409.37 80
5 07/29/2025 16:10:26 -0.05, 140.71 0.33, 139.03 190.84 80
6 07/30/2025 15:49:01 -0.05, 140.69 -0.69, 143.56 327.55 80
7 08/01/2025 04:10:58 0.05, 140.63 -0.47, 138.25 270.97 80
8 08/02/2025 03:54:54 0.06, 140.61 0.55, 142.78 247.88 80
9 08/03/2025 16:16:42 -0.06, 140.59 0.60, 137.51 351.31 80
10 08/04/2025 15:55:18 -0.06, 140.57 -0.41, 142.03 167.47 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 7/22/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250723.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 07/22/2025 in txt file.

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