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: 4/15/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 04/16/2025 04:16:16 -0.01, 140.77 -0.84, 137.01 428.68 80
2 04/17/2025 04:00:09 -0.01, 140.77 0.17, 141.55 88.41 80
3 04/19/2025 16:00:28 0.02, 140.78 -0.00, 140.83 5.86 80
4 04/22/2025 04:03:35 -0.03, 140.77 -0.16, 140.07 78.79 80
5 04/23/2025 03:47:29 -0.03, 140.76 0.85, 144.61 439.26 80
6 04/24/2025 16:09:14 0.03, 140.75 0.32, 139.35 159.05 80
7 04/25/2025 15:47:47 0.03, 140.74 -0.70, 143.89 359.12 80
8 04/27/2025 04:09:40 -0.03, 140.72 -0.51, 138.60 241.94 80
9 04/28/2025 03:53:33 -0.03, 140.71 0.52, 143.14 276.63 80
10 04/29/2025 16:15:18 0.03, 140.69 0.65, 137.88 320.67 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 4/15/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250416.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 04/15/2025 in txt file.

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