Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 30.  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) (   0.53,-128.67)  124.64                80
 10/02/2019   09:46:25   (   0.30,-127.54) (  -0.47,-124.09)  392.19                80
 10/03/2019   22:05:25   (  -0.28,-127.44) (  -0.73,-129.33)  216.13                80
 10/04/2019   21:49:09   (  -0.29,-127.40) (   0.28,-124.75)  300.74                80
 10/06/2019   10:08:02   (   0.26,-127.37) (   0.82,-129.97)  296.30                80
 10/07/2019   09:51:46   (   0.27,-127.32) (  -0.18,-125.40)  220.04                80
 10/08/2019   22:10:47   (  -0.25,-127.21) (  -1.01,-130.63)  389.66                80
 10/09/2019   21:54:31   (  -0.26,-127.17) (  -0.00,-126.06)  126.90                80
 10/11/2019   10:13:22   (   0.23,-127.14) (   1.16,-131.26)  469.84                80
 10/12/2019   09:57:07   (   0.24,-127.09) (   0.16,-126.68)   46.29                80