Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/03/2019   22:14:22   (   0.01,-128.43) (  -0.69,-131.45)  345.16                80
 06/04/2019   21:58:08   (   0.00,-128.42) (   0.35,-126.89)  175.13                80
 06/06/2019   10:16:59   (  -0.02,-128.40) (   0.83,-132.09)  420.99                80
 06/07/2019   10:00:45   (  -0.01,-128.39) (  -0.21,-127.52)   98.71                80
 06/09/2019   22:03:31   (   0.01,-128.35) (   0.02,-128.19)   18.40                80
 06/12/2019   10:03:27   (  -0.02,-128.32) (   0.12,-128.83)   58.77                80
 06/13/2019   09:47:13   (  -0.01,-128.30) (  -0.92,-124.26)  460.56                80
 06/14/2019   22:06:14   (   0.04,-128.27) (  -0.23,-129.51)  140.74                80
 06/15/2019   21:49:59   (   0.03,-128.25) (   0.75,-124.93)  378.49                80