Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 4 12.  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)
 04/13/2025   16:15:48   (   0.01, 140.77) (   0.68, 137.77)  341.70                80
 04/14/2025   15:54:22   (   0.01, 140.77) (  -0.32, 142.31)  174.56                80
 04/16/2025   04:16:16   (  -0.01, 140.78) (  -0.82, 137.00)  429.62                80
 04/17/2025   04:00:10   (  -0.01, 140.78) (   0.18, 141.54)   87.12                80
 04/19/2025   16:00:28   (   0.01, 140.79) (  -0.02, 140.82)    4.49                80
 04/22/2025   04:03:34   (  -0.01, 140.79) (  -0.20, 140.08)   82.05                80
 04/23/2025   03:47:28   (  -0.01, 140.79) (   0.82, 144.62)  435.68                80
 04/24/2025   16:09:13   (   0.01, 140.78) (   0.35, 139.36)  162.56                80
 04/25/2025   15:47:47   (   0.01, 140.77) (  -0.67, 143.89)  355.27                80