Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 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)
 08/13/2019   10:30:43   (  -0.04,-137.20) (  -0.34,-135.78)  162.09                80
 08/14/2019   22:52:24   (   0.04,-137.18) (  -0.81,-141.02)  437.30                80
 08/15/2019   22:36:08   (   0.04,-137.18) (   0.19,-136.45)   82.97                80
 08/18/2019   10:36:06   (  -0.04,-137.16) (  -0.07,-137.09)    8.90                80
 08/20/2019   22:38:51   (   0.05,-137.12) (  -0.08,-137.76)   71.74                80
 08/21/2019   22:22:35   (   0.05,-137.11) (   0.91,-133.18)  447.73                80
 08/23/2019   10:44:08   (  -0.05,-137.09) (   0.25,-138.39)  147.79                80
 08/24/2019   10:23:58   (  -0.05,-137.07) (  -0.80,-133.82)  371.02                 5
 08/25/2019   22:44:12   (   0.06,-137.03) (  -0.40,-139.05)  231.31                80
 08/26/2019   22:27:58   (   0.06,-137.00) (   0.65,-134.49)  286.95                80