Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2019   10:54:52   (  -0.03,-137.19) (   0.83,-140.99)  432.38                80
 09/03/2019   10:33:17   (  -0.03,-137.19) (  -0.23,-136.42)   88.17                80
 09/05/2019   22:38:42   (   0.03,-137.17) (   0.06,-137.09)    9.40                80
 09/08/2019   10:41:19   (  -0.03,-137.14) (   0.08,-137.72)   65.84                80
 09/09/2019   10:19:43   (  -0.04,-137.13) (  -0.92,-133.15)  453.79                80
 09/10/2019   22:41:24   (   0.04,-137.10) (  -0.25,-138.39)  146.24                80
 09/11/2019   22:25:08   (   0.04,-137.09) (   0.75,-133.81)  373.23                80
 09/13/2019   10:46:41   (  -0.04,-137.07) (   0.38,-139.02)  222.45                80
 09/14/2019   10:25:05   (  -0.04,-137.05) (  -0.62,-134.45)  296.80                80