Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 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)
 10/01/2019   10:02:40   (   0.29,-127.58) (   0.54,-128.67)  124.64                80
 10/02/2019   09:46:24   (   0.30,-127.54) (  -0.46,-124.09)  392.15                80
 10/03/2019   22:05:26   (  -0.28,-127.44) (  -0.68,-129.34)  216.40                80
 10/04/2019   21:49:10   (  -0.29,-127.40) (   0.32,-124.76)  300.43                80
 10/06/2019   10:08:02   (   0.26,-127.36) (   0.83,-129.97)  296.54                80
 10/07/2019   09:51:46   (   0.27,-127.32) (  -0.17,-125.39)  219.73                80
 10/08/2019   22:10:46   (  -0.25,-127.21) (  -1.02,-130.63)  390.17                80
 10/09/2019   21:54:31   (  -0.26,-127.16) (  -0.02,-126.05)  126.34                80
 10/11/2019   10:13:22   (   0.23,-127.14) (   1.18,-131.26)  470.36                80
 10/12/2019   09:57:07   (   0.24,-127.09) (   0.17,-126.68)   45.78                80
 10/14/2019   21:57:12   (  -0.23,-126.92) (  -0.36,-127.34)   49.08                80