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: 9/1/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/02/2025 04:10:53 0.00, 140.77 -0.54, 138.29 282.91 80
2 09/03/2025 03:54:48 0.00, 140.78 0.45, 142.83 233.24 80
3 09/04/2025 16:16:36 -0.01, 140.77 0.69, 137.55 366.80 80
4 09/05/2025 15:55:11 -0.00, 140.78 -0.30, 142.09 149.68 80
5 09/07/2025 04:17:06 0.01, 140.78 -0.87, 136.79 455.03 80
6 09/08/2025 04:01:00 0.00, 140.78 0.12, 141.32 62.07 80
7 09/10/2025 16:04:03 -0.00, 140.76 0.02, 140.58 19.23 80
8 09/11/2025 15:42:38 -0.00, 140.75 -0.98, 145.12 498.17 80
9 09/13/2025 04:04:32 0.00, 140.75 -0.23, 139.83 105.73 80
10 09/14/2025 03:48:28 0.00, 140.74 0.83, 144.35 411.83 80
11 09/15/2025 16:10:15 -0.00, 140.72 0.35, 139.09 185.83 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/1/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250902.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/01/2025 in txt file.

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