Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 10 20.  Predictions up to the next  14.0 days:

     Date     Time(HIMAWARI-9)   HIMAWARI-9 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2025   03:54:05   (   0.03, 140.74) (   0.53, 143.02)  259.85                80
 10/22/2025   16:15:50   (  -0.03, 140.72) (   0.63, 137.76)  336.92                80
 10/23/2025   15:54:23   (  -0.02, 140.72) (  -0.37, 142.31)  181.30                80
 10/25/2025   04:18:58   (   0.01, 140.71) (  -0.81, 137.01)  421.42                80
 10/26/2025   03:57:31   (   0.01, 140.70) (   0.20, 141.55)   96.94                80
 10/27/2025   16:21:55   (  -0.00, 140.67) (   1.00, 136.30)  498.69                80
 10/28/2025   16:00:30   (  -0.01, 140.66) (  -0.07, 140.83)   19.91                80
 10/31/2025   04:06:18   (   0.01, 140.63) (  -0.09, 140.07)   63.22                80
 11/01/2025   03:44:51   (   0.01, 140.61) (   0.92, 144.61)  456.15                80
 11/02/2025   16:09:16   (  -0.01, 140.57) (   0.26, 139.36)  137.63                80
 11/03/2025   15:47:49   (  -0.01, 140.55) (  -0.76, 143.90)  381.99                80