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: 8/30/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/31/2025 15:48:58 0.00, 140.76 -0.65, 143.59 323.12 80
2 09/02/2025 04:10:53 0.00, 140.77 -0.53, 138.29 283.07 80
3 09/03/2025 03:54:48 0.00, 140.78 0.45, 142.83 233.03 80
4 09/04/2025 16:16:36 -0.00, 140.77 0.69, 137.55 366.90 80
5 09/05/2025 15:55:11 -0.00, 140.78 -0.30, 142.09 149.54 80
6 09/07/2025 04:17:06 0.00, 140.79 -0.87, 136.79 455.36 80
7 09/08/2025 04:01:01 0.00, 140.78 0.12, 141.32 61.66 80
8 09/10/2025 16:04:03 -0.00, 140.76 0.02, 140.58 19.63 80
9 09/11/2025 15:42:38 -0.00, 140.75 -0.98, 145.12 497.67 80
10 09/13/2025 04:04:32 -0.00, 140.76 -0.24, 139.83 106.35 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/30/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250831.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/30/2025 in txt file.

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