Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 4 16.  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)
 04/17/2025   04:00:09   (  -0.01, 140.77) (   0.16, 141.55)   88.57                80
 04/19/2025   16:00:28   (   0.02, 140.78) (  -0.01, 140.83)    6.33                80
 04/22/2025   04:03:34   (  -0.03, 140.76) (  -0.19, 140.08)   78.15                80
 04/23/2025   03:47:27   (  -0.03, 140.76) (   0.84, 144.62)  439.99                80
 04/24/2025   16:09:13   (   0.03, 140.75) (   0.32, 139.35)  158.30                80
 04/25/2025   15:47:45   (   0.03, 140.74) (  -0.66, 143.90)  360.02                80
 04/27/2025   04:09:37   (  -0.03, 140.72) (  -0.53, 138.61)  240.69                80
 04/28/2025   03:53:31   (  -0.03, 140.71) (   0.51, 143.15)  278.09                80
 04/29/2025   16:15:15   (   0.03, 140.69) (   0.68, 137.90)  319.07                80
 04/30/2025   15:53:49   (   0.04, 140.68) (  -0.37, 142.43)  199.74                80