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: 5/13/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 05/14/2025 03:54:08 0.00, 140.76 0.48, 142.99 254.37 80
2 05/15/2025 16:15:58 -0.01, 140.74 0.68, 137.71 345.78 80
3 05/16/2025 15:54:35 -0.01, 140.74 -0.34, 142.23 170.63 80
4 05/18/2025 04:16:32 0.02, 140.73 -0.85, 136.93 433.82 80
5 05/19/2025 04:00:29 0.01, 140.72 0.17, 141.45 83.41 80
6 05/21/2025 16:00:55 -0.01, 140.68 0.01, 140.70 3.68 80
7 05/24/2025 04:04:08 0.02, 140.64 -0.17, 139.92 83.14 80
8 05/25/2025 03:48:05 0.02, 140.62 0.85, 144.44 434.86 80
9 05/26/2025 16:09:55 -0.02, 140.59 0.28, 139.16 162.57 80
10 05/27/2025 15:48:31 -0.02, 140.57 -0.69, 143.69 355.44 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 5/13/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250514.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 05/13/2025 in txt file.

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