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: 8/27/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/28/2025 04:04:40 -0.01, 140.73 -0.21, 139.79 106.28 80
2 08/29/2025 03:48:34 -0.01, 140.72 0.77, 144.33 411.32 80
3 08/30/2025 16:10:23 0.00, 140.70 0.38, 139.06 187.85 80
4 08/31/2025 15:48:58 -0.00, 140.69 -0.66, 143.58 329.55 80
5 09/02/2025 04:10:53 0.01, 140.68 -0.53, 138.29 272.77 80
6 09/03/2025 03:54:49 0.00, 140.66 0.51, 142.81 245.35 80
7 09/04/2025 16:16:36 0.00, 140.64 0.70, 137.55 352.36 80
8 09/05/2025 15:55:12 0.00, 140.62 -0.34, 142.08 165.97 80
9 09/07/2025 04:17:07 -0.01, 140.60 -0.84, 136.77 435.20 80
10 09/08/2025 04:01:02 -0.01, 140.58 0.15, 141.31 83.77 80
11 09/10/2025 16:01:24 0.01, 140.51 0.01, 140.58 6.97 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/27/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250828.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/27/2025 in txt file.

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