Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2019   09:55:22   (   0.01,-128.43) (  -0.50,-126.21)  253.56                80
 06/03/2019   22:14:23   (   0.01,-128.43) (  -0.67,-131.46)  345.29                80
 06/04/2019   21:58:08   (   0.00,-128.42) (   0.37,-126.89)  174.97                80
 06/06/2019   10:17:00   (  -0.02,-128.40) (   0.81,-132.09)  421.27                80
 06/07/2019   10:00:45   (  -0.01,-128.39) (  -0.23,-127.53)   98.41                80
 06/09/2019   22:03:31   (   0.01,-128.35) (   0.04,-128.19)   17.75                80
 06/12/2019   10:03:28   (  -0.02,-128.31) (   0.10,-128.83)   59.29                80
 06/13/2019   09:47:13   (  -0.01,-128.29) (  -0.94,-124.26)  459.93                80
 06/14/2019   22:06:15   (   0.04,-128.27) (  -0.22,-129.51)  141.43                80
 06/15/2019   21:49:59   (   0.03,-128.25) (   0.77,-124.93)  377.76                80