Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/29/2020   10:31:26   (   0.04,-137.24) (  -0.25,-135.92)  150.70                80
 01/30/2020   22:53:06   (  -0.04,-137.29) (  -0.91,-141.16)  441.16                80
 01/31/2020   22:36:51   (  -0.04,-137.32) (   0.13,-136.58)   84.28                80
 02/03/2020   10:36:46   (   0.05,-137.42) (   0.01,-137.20)   23.82                80
 02/05/2020   22:39:31   (  -0.06,-137.47) (  -0.13,-137.87)   45.47                80
 02/06/2020   22:23:15   (  -0.06,-137.49) (   0.91,-133.30)  478.77                80
 02/08/2020   10:44:45   (   0.07,-137.54) (   0.26,-138.49)  108.31                80
 02/09/2020   10:23:10   (   0.06,-137.56) (  -0.77,-133.92)  415.23                80
 02/10/2020   22:44:49   (  -0.07,-137.57) (  -0.43,-139.15)  180.13                80
 02/11/2020   22:28:34   (  -0.07,-137.58) (   0.60,-134.57)  343.33                80