Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/04/2019   10:16:23   (   0.37,-128.34) (   1.05,-131.34)  342.19                80
 09/05/2019   09:54:49   (   0.37,-128.32) (  -0.00,-126.77)  177.04                80
 09/06/2019   22:16:28   (  -0.37,-128.27) (  -1.23,-132.00)  425.83                80
 09/07/2019   22:00:13   (  -0.36,-128.25) (  -0.17,-127.43)   93.49                80
 09/10/2019   10:00:10   (   0.35,-128.23) (   0.31,-128.07)   18.76                80
 09/12/2019   22:02:55   (  -0.35,-128.15) (  -0.50,-128.73)   66.45                80
 09/13/2019   21:46:41   (  -0.35,-128.13) (   0.56,-124.17)  452.66                80
 09/15/2019   10:08:12   (   0.34,-128.13) (   0.63,-129.37)  141.08                80
 09/16/2019   09:46:37   (   0.34,-128.11) (  -0.37,-124.79)  377.46                80
 09/17/2019   22:08:18   (  -0.34,-128.04) (  -0.76,-130.04)  227.98                80