Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2019   21:54:52   (  -0.37,-128.33) (   0.14,-126.14)  251.16                80
 09/04/2019   10:16:23   (   0.37,-128.34) (   1.06,-131.33)  342.14                80
 09/05/2019   09:54:48   (   0.37,-128.32) (   0.00,-126.77)  177.20                80
 09/06/2019   22:16:28   (  -0.37,-128.27) (  -1.23,-132.00)  425.28                80
 09/07/2019   22:00:13   (  -0.36,-128.26) (  -0.17,-127.43)   94.15                80
 09/09/2019   10:21:45   (   0.35,-128.26) (   1.36,-132.63)  499.39                80
 09/10/2019   10:00:10   (   0.35,-128.24) (   0.31,-128.07)   19.54                80
 09/12/2019   22:02:55   (  -0.35,-128.16) (  -0.48,-128.73)   65.15                80
 09/13/2019   21:46:40   (  -0.35,-128.15) (   0.52,-124.16)  454.05                80
 09/15/2019   10:08:12   (   0.34,-128.14) (   0.60,-129.37)  139.72                80