Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 4 17.  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)
 04/19/2025   16:00:28   (   0.02, 140.78) (   0.00, 140.83)    5.85                80
 04/22/2025   04:03:35   (  -0.03, 140.76) (  -0.17, 140.07)   78.32                80
 04/23/2025   03:47:28   (  -0.03, 140.76) (   0.85, 144.61)  439.78                80
 04/24/2025   16:09:14   (   0.03, 140.75) (   0.32, 139.35)  158.72                80
 04/25/2025   15:47:47   (   0.03, 140.74) (  -0.70, 143.89)  359.52                80
 04/27/2025   04:09:40   (  -0.03, 140.72) (  -0.51, 138.60)  241.21                80
 04/28/2025   03:53:33   (  -0.03, 140.71) (   0.52, 143.14)  277.46                80
 04/29/2025   16:15:18   (   0.04, 140.69) (   0.65, 137.88)  319.97                80
 04/30/2025   15:53:51   (   0.04, 140.68) (  -0.32, 142.43)  198.74                80