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: 8/28/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 08/29/2025 03:48:35 -0.01, 140.75 0.79, 144.33 408.53 80
2 08/30/2025 16:10:23 0.01, 140.76 0.36, 139.05 194.19 80
3 08/31/2025 15:48:58 0.00, 140.78 -0.62, 143.59 320.55 80
4 09/02/2025 04:10:53 0.01, 140.81 -0.57, 138.29 286.75 80
5 09/03/2025 03:54:48 0.00, 140.82 0.48, 142.82 228.56 80
6 09/04/2025 16:16:36 -0.00, 140.83 0.73, 137.56 372.81 80
7 09/05/2025 15:55:10 0.00, 140.84 -0.26, 142.10 142.81 80
8 09/07/2025 04:17:05 -0.00, 140.86 -0.92, 136.79 463.16 80
9 09/08/2025 04:01:00 -0.00, 140.86 0.07, 141.33 53.08 80
10 09/10/2025 16:04:03 0.00, 140.86 0.08, 140.59 30.63 80
11 09/11/2025 15:42:38 0.00, 140.86 -0.98, 145.12 485.75 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 8/28/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250829.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 08/28/2025 in txt file.

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