Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 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)
 02/13/2020   10:50:03   (   0.03,-137.22) (   0.59,-139.76)  288.74                80
 02/14/2020   10:28:28   (   0.03,-137.22) (  -0.45,-135.18)  232.69                80
 02/15/2020   22:50:07   (  -0.04,-137.22) (  -0.76,-140.41)  364.09                80
 02/16/2020   22:33:51   (  -0.04,-137.21) (   0.28,-135.83)  157.07                80
 02/18/2020   10:55:22   (   0.04,-137.20) (   0.88,-141.03)  436.47                80
 02/19/2020   10:33:45   (   0.05,-137.19) (  -0.10,-136.44)   84.26                80
 02/21/2020   22:39:09   (  -0.05,-137.16) (  -0.06,-137.10)    7.44                80
 02/24/2020   10:41:44   (   0.05,-137.13) (   0.19,-137.72)   66.97                80
 02/25/2020   10:20:08   (   0.05,-137.12) (  -0.85,-133.15)  453.19                80
 02/26/2020   22:41:48   (  -0.05,-137.10) (  -0.34,-138.38)  145.51                80