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: 7/23/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 07/24/2025 16:04:09 -0.05, 140.80 0.01, 140.55 28.21 80
2 07/25/2025 15:42:45 -0.05, 140.80 -1.00, 145.09 488.51 80
3 07/27/2025 04:04:42 0.05, 140.76 -0.17, 139.78 111.88 80
4 07/28/2025 03:48:38 0.05, 140.74 0.84, 144.31 405.79 80
5 07/29/2025 16:10:25 -0.05, 140.75 0.36, 139.04 195.33 80
6 07/30/2025 15:49:01 -0.05, 140.74 -0.66, 143.57 322.56 80
7 08/01/2025 04:10:58 0.06, 140.68 -0.50, 138.26 276.78 80
8 08/02/2025 03:54:53 0.06, 140.67 0.52, 142.79 241.55 80
9 08/03/2025 16:16:42 -0.06, 140.66 0.63, 137.51 358.51 80
10 08/04/2025 15:55:17 -0.07, 140.64 -0.39, 142.04 159.70 80
11 08/06/2025 04:17:14 0.07, 140.59 -0.81, 136.74 439.31 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 7/23/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250724.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 07/23/2025 in txt file.

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