Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 4 18.  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) (   0.01, 140.83)    5.86                80
 04/22/2025   04:03:35   (  -0.03, 140.76) (  -0.18, 140.07)   78.22                80
 04/23/2025   03:47:28   (  -0.03, 140.76) (   0.84, 144.61)  439.87                80
 04/24/2025   16:09:14   (   0.04, 140.75) (   0.33, 139.35)  158.65                80
 04/25/2025   15:47:47   (   0.03, 140.74) (  -0.69, 143.89)  359.58                80
 04/27/2025   04:09:39   (  -0.03, 140.72) (  -0.52, 138.60)  241.11                80
 04/28/2025   03:53:33   (  -0.03, 140.70) (   0.50, 143.14)  277.58                80
 04/29/2025   16:15:18   (   0.04, 140.69) (   0.66, 137.88)  319.88                80
 04/30/2025   15:53:52   (   0.04, 140.67) (  -0.36, 142.42)  198.80                80
 05/02/2025   04:15:44   (  -0.04, 140.65) (  -0.83, 137.13)  401.45                80