Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/20/2019   22:38:51   (   0.04,-137.16) (  -0.08,-137.75)   67.08                80
 08/21/2019   22:22:35   (   0.04,-137.15) (   0.91,-133.18)  452.85                80
 08/23/2019   10:44:08   (  -0.04,-137.13) (   0.25,-138.39)  142.90                80
 08/24/2019   10:22:33   (  -0.04,-137.12) (  -0.81,-133.82)  376.32                80
 08/25/2019   22:44:13   (   0.05,-137.09) (  -0.41,-139.05)  224.45                80
 08/26/2019   22:27:58   (   0.05,-137.06) (   0.64,-134.49)  294.26                80
 08/28/2019   10:49:30   (  -0.05,-137.03) (   0.52,-139.70)  303.01                80
 08/29/2019   10:27:55   (  -0.06,-137.01) (  -0.48,-135.12)  215.28                80
 08/30/2019   22:49:35   (   0.06,-136.96) (  -0.68,-140.36)  386.74                80
 08/31/2019   22:33:20   (   0.06,-136.94) (   0.31,-135.78)  131.45                80