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: 9/14/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/15/2025 16:10:15 -0.02, 140.82 0.35, 139.09 197.07 80
2 09/16/2025 15:48:50 -0.02, 140.84 -0.65, 143.63 317.42 80
3 09/18/2025 04:10:45 0.03, 140.80 -0.52, 138.32 282.19 80
4 09/19/2025 03:54:40 0.03, 140.81 0.48, 142.86 233.47 80
5 09/20/2025 16:16:27 -0.03, 140.88 0.69, 137.59 374.74 80
6 09/21/2025 15:55:02 -0.03, 140.89 -0.31, 142.13 141.13 80
7 09/23/2025 04:16:57 0.03, 140.84 -0.85, 136.83 457.39 80
8 09/24/2025 04:00:51 0.03, 140.84 0.16, 141.36 59.34 80
9 09/26/2025 16:03:53 -0.03, 140.90 0.00, 140.63 30.52 80
10 09/27/2025 15:42:28 -0.02, 140.91 -1.00, 145.16 486.12 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/14/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250915.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/14/2025 in txt file.

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