Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/28/2019   22:00:04   (  -0.30,-127.64) (  -0.38,-128.04)   45.40                80
 09/29/2019   21:43:49   (  -0.31,-127.61) (   0.62,-123.47)  472.11                80
 10/01/2019   10:02:40   (   0.29,-127.58) (   0.53,-128.67)  124.82                80
 10/02/2019   09:46:25   (   0.30,-127.54) (  -0.47,-124.10)  392.04                80
 10/03/2019   22:05:25   (  -0.28,-127.44) (  -0.72,-129.33)  215.98                80
 10/04/2019   21:49:09   (  -0.29,-127.40) (   0.29,-124.76)  300.92                80
 10/06/2019   10:08:01   (   0.27,-127.37) (   0.87,-129.96)  296.32                80
 10/07/2019   09:51:45   (   0.27,-127.32) (  -0.14,-125.39)  220.04                80
 10/08/2019   22:10:47   (  -0.25,-127.22) (  -0.99,-130.64)  389.37                80
 10/09/2019   21:54:31   (  -0.26,-127.17) (   0.02,-126.06)  127.26                80