Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/13/2020   22:38:48   (  -0.00,-137.21) (  -0.12,-137.63)   48.22                80
 03/14/2020   22:22:32   (  -0.01,-137.21) (   0.93,-133.05)  473.83                80
 03/16/2020   10:44:02   (   0.01,-137.22) (   0.26,-138.25)  117.85                80
 03/17/2020   10:22:27   (   0.01,-137.21) (  -0.78,-133.67)  403.57                80
 03/18/2020   22:44:06   (  -0.02,-137.20) (  -0.38,-138.91)  193.83                80
 03/19/2020   22:27:50   (  -0.02,-137.20) (   0.61,-134.32)  327.59                80
 03/21/2020   10:49:21   (   0.02,-137.20) (   0.53,-139.53)  264.65                80
 03/22/2020   10:27:46   (   0.02,-137.19) (  -0.51,-134.95)  256.32                80
 03/23/2020   22:49:24   (  -0.02,-137.17) (  -0.70,-140.17)  342.02                80
 03/24/2020   22:33:09   (  -0.02,-137.17) (   0.35,-135.60)  178.93                80
 03/26/2020   10:54:39   (   0.02,-137.17) (   0.86,-140.79)  413.81                80