Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/05/2019   09:54:48   (   0.37,-128.32) (   0.05,-126.76)  177.14                80
 09/06/2019   22:16:28   (  -0.37,-128.27) (  -1.22,-132.00)  425.87                80
 09/07/2019   22:00:14   (  -0.36,-128.25) (  -0.17,-127.44)   93.42                80
 09/10/2019   10:00:10   (   0.36,-128.23) (   0.31,-128.07)   18.75                80
 09/12/2019   22:02:55   (  -0.35,-128.15) (  -0.49,-128.73)   66.68                80
 09/13/2019   21:46:41   (  -0.35,-128.13) (   0.57,-124.17)  452.38                80
 09/15/2019   10:08:12   (   0.34,-128.13) (   0.62,-129.37)  141.30                80
 09/16/2019   09:46:37   (   0.35,-128.11) (  -0.38,-124.79)  377.19                80
 09/17/2019   22:08:17   (  -0.34,-128.03) (  -0.81,-130.03)  228.40                80
 09/18/2019   21:52:02   (  -0.34,-128.01) (   0.25,-125.47)  290.10                80