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: 2/13/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 02/14/2025 16:03:43 -0.01, 140.77 -0.01, 140.75 2.96 80
2 02/17/2025 04:04:17 0.01, 140.74 -0.17, 139.96 89.27 80
3 02/18/2025 03:48:13 0.01, 140.73 0.87, 144.48 428.07 80
4 02/19/2025 16:10:02 -0.01, 140.71 0.32, 139.21 171.02 80
5 02/20/2025 15:48:37 -0.00, 140.70 -0.67, 143.74 346.39 80
6 02/22/2025 04:10:35 -0.00, 140.68 -0.48, 138.42 256.30 80
7 02/23/2025 03:54:31 -0.00, 140.66 0.51, 142.96 261.47 80
8 02/24/2025 16:16:19 0.00, 140.64 0.65, 137.68 336.72 80
9 02/25/2025 15:54:55 -0.00, 140.62 -0.34, 142.21 181.15 80
10 02/27/2025 04:16:53 0.00, 140.59 -0.80, 136.89 421.01 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 2/13/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250214.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 02/13/2025 in txt file.

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