Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2020   10:30:19   (   0.03,-137.18) (  -0.39,-135.26)  218.47                80
 07/17/2020   22:54:38   (  -0.02,-137.17) (  -0.79,-140.49)  378.78                80
 07/18/2020   22:33:02   (  -0.01,-137.16) (   0.28,-135.92)  141.69                80
 07/20/2020   10:57:12   (  -0.01,-137.13) (   0.87,-141.11)  453.21                80
 07/21/2020   10:35:36   (  -0.02,-137.12) (  -0.14,-136.53)   66.77                80
 07/23/2020   22:38:18   (   0.02,-137.07) (  -0.01,-137.17)   11.65                80
 07/26/2020   10:40:52   (   0.00,-137.02) (   0.16,-137.78)   87.14                80
 07/27/2020   10:24:35   (  -0.00,-136.99) (  -0.85,-133.20)  432.26                80
 07/28/2020   22:43:33   (   0.01,-136.96) (  -0.30,-138.43)  167.66                80
 07/29/2020   22:27:17   (   0.01,-136.93) (   0.72,-133.85)  351.47                80