Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/14/2019   22:52:24   (   0.04,-137.19) (  -0.79,-141.03)  436.38                80
 08/15/2019   22:36:08   (   0.04,-137.19) (   0.20,-136.45)   84.29                80
 08/18/2019   10:36:06   (  -0.04,-137.19) (  -0.08,-137.09)   11.28                80
 08/20/2019   22:38:51   (   0.05,-137.15) (  -0.08,-137.76)   68.28                80
 08/21/2019   22:22:36   (   0.05,-137.14) (   0.92,-133.18)  451.60                80
 08/23/2019   10:44:08   (  -0.05,-137.13) (   0.25,-138.39)  143.37                80
 08/24/2019   10:22:33   (  -0.05,-137.12) (  -0.80,-133.82)  375.84                80
 08/25/2019   22:44:13   (   0.06,-137.08) (  -0.41,-139.05)  225.80                80
 08/26/2019   22:27:58   (   0.06,-137.06) (   0.64,-134.49)  292.88                80