Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/15/2019   22:36:09   (   0.04,-137.19) (   0.21,-136.45)   84.49                80
 08/18/2019   10:38:46   (  -0.05,-137.19) (  -0.09,-137.09)   11.60                80
 08/20/2019   22:38:51   (   0.05,-137.16) (  -0.07,-137.76)   67.99                80
 08/21/2019   22:22:36   (   0.05,-137.15) (   0.93,-133.18)  451.95                80
 08/23/2019   10:44:08   (  -0.05,-137.14) (   0.24,-138.39)  143.09                80
 08/24/2019   10:22:34   (  -0.05,-137.12) (  -0.82,-133.82)  376.14                80
 08/25/2019   22:44:13   (   0.06,-137.08) (  -0.40,-139.05)  225.34                80
 08/26/2019   22:27:58   (   0.06,-137.06) (   0.66,-134.49)  293.36                80
 08/28/2019   10:49:31   (  -0.07,-137.03) (   0.50,-139.70)  303.25                80