Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/27/2019   10:06:12   (   0.03,-128.44) (   0.27,-129.47)  117.03                80
 05/28/2019   09:49:58   (   0.03,-128.44) (  -0.77,-124.90)  404.00                80
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.40,-130.14)  193.56                80
 05/30/2019   21:52:45   (  -0.02,-128.45) (   0.64,-125.58)  327.42                80
 06/01/2019   10:11:36   (   0.01,-128.43) (   0.55,-130.78)  267.82                80
 06/02/2019   09:55:22   (   0.01,-128.43) (  -0.49,-126.21)  252.40                80
 06/03/2019   22:14:23   (   0.01,-128.41) (  -0.68,-131.46)  347.20                80
 06/04/2019   21:58:08   (   0.00,-128.40) (   0.36,-126.89)  172.82                80
 06/06/2019   10:17:00   (  -0.02,-128.38) (   0.83,-132.09)  423.38                80
 06/07/2019   10:00:45   (  -0.01,-128.37) (  -0.21,-127.53)   95.99                80