Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2020   10:48:13   (   0.03,-137.18) (   0.57,-139.48)  261.81                80
 08/22/2020   10:31:56   (   0.03,-137.18) (  -0.45,-134.89)  259.74                80
 08/23/2020   22:50:55   (  -0.03,-137.17) (  -0.69,-140.12)  336.60                80
 08/24/2020   22:34:38   (  -0.03,-137.16) (   0.33,-135.54)  184.50                80
 08/26/2020   10:53:28   (   0.03,-137.14) (   0.83,-140.74)  409.67                80
 08/27/2020   10:37:12   (   0.02,-137.13) (  -0.19,-136.15)  110.84                80
 08/28/2020   22:56:10   (   0.00,-137.11) (  -0.95,-141.38)  487.41                80
 08/29/2020   22:39:54   (   0.01,-137.09) (   0.07,-136.80)   32.86                80
 09/01/2020   10:39:48   (  -0.00,-137.05) (   0.07,-137.42)   41.70                80
 09/02/2020   10:23:31   (  -0.00,-137.03) (  -0.95,-132.83)  478.52                80