Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2019   09:49:57   (   0.03,-128.44) (  -0.75,-124.89)  404.09                80
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.42,-130.14)  193.18                80
 05/30/2019   21:52:44   (  -0.02,-128.45) (   0.62,-125.57)  327.84                80
 06/01/2019   10:11:37   (   0.00,-128.43) (   0.50,-130.79)  267.63                80
 06/02/2019   09:55:21   (   0.01,-128.43) (  -0.48,-126.21)  252.62                80
 06/03/2019   22:14:22   (   0.01,-128.42) (  -0.69,-131.45)  346.66                80
 06/04/2019   21:58:08   (   0.00,-128.41) (   0.35,-126.89)  173.38                80
 06/06/2019   10:16:59   (  -0.02,-128.38) (   0.83,-132.09)  423.05                80
 06/07/2019   10:00:45   (  -0.01,-128.37) (  -0.21,-127.52)   96.37                80
 06/09/2019   22:03:31   (   0.02,-128.33) (   0.03,-128.19)   15.13                80