Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/01/2019   22:11:06   (  -0.37,-128.34) (  -0.93,-130.70)  268.89                80
 09/02/2019   21:54:51   (  -0.37,-128.34) (   0.13,-126.13)  251.21                80
 09/04/2019   10:16:23   (   0.37,-128.34) (   1.07,-131.33)  342.15                80
 09/05/2019   09:54:48   (   0.37,-128.32) (   0.01,-126.77)  177.21                80
 09/06/2019   22:16:29   (  -0.37,-128.28) (  -1.18,-132.01)  425.12                80
 09/07/2019   22:00:13   (  -0.36,-128.26) (  -0.18,-127.43)   94.33                80
 09/09/2019   10:21:45   (   0.35,-128.26) (   1.31,-132.65)  499.26                80
 09/10/2019   10:00:10   (   0.36,-128.24) (   0.32,-128.07)   19.64                80
 09/12/2019   22:02:55   (  -0.35,-128.17) (  -0.49,-128.73)   64.86                80
 09/13/2019   21:46:40   (  -0.35,-128.15) (   0.57,-124.17)  454.37                80