Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2019   10:13:25   (   0.23,-127.97) (   1.01,-131.29)  379.23                80
 10/12/2019   09:57:10   (   0.24,-128.00) (  -0.06,-126.72)  145.77                80
 10/13/2019   22:16:10   (  -0.22,-127.99) (  -1.13,-131.96)  453.52                80
 10/14/2019   21:59:56   (  -0.23,-128.02) (  -0.07,-127.40)   71.46                80
 10/17/2019   10:02:32   (   0.22,-128.15) (   0.21,-128.03)   13.90                80
 10/19/2019   22:02:38   (  -0.21,-128.15) (  -0.32,-128.70)   63.23                80
 10/20/2019   21:46:22   (  -0.22,-128.17) (   0.69,-124.13)  460.46                80
 10/22/2019   10:05:14   (   0.20,-128.26) (   0.41,-129.34)  123.21                80
 10/23/2019   09:48:59   (   0.20,-128.27) (  -0.60,-124.77)  400.07                80