Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 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)
 05/27/2019   10:06:13   (   0.03,-128.44) (   0.25,-129.47)  117.01                80
 05/28/2019   09:49:57   (   0.03,-128.44) (  -0.73,-124.89)  404.02                80
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.38,-130.15)  193.44                80
 05/30/2019   21:52:44   (  -0.02,-128.45) (   0.60,-125.57)  327.55                80
 06/01/2019   10:11:36   (   0.01,-128.43) (   0.53,-130.78)  267.80                80
 06/02/2019   09:55:22   (   0.01,-128.43) (  -0.51,-126.22)  252.42                80
 06/03/2019   22:14:23   (   0.01,-128.41) (  -0.67,-131.46)  347.08                80
 06/04/2019   21:58:08   (   0.00,-128.40) (   0.31,-126.88)  172.95                80
 06/06/2019   10:17:00   (  -0.02,-128.38) (   0.82,-132.10)  423.39                80
 06/07/2019   10:00:46   (  -0.01,-128.37) (  -0.22,-127.53)   96.02                80
 06/09/2019   22:03:31   (   0.02,-128.32) (   0.04,-128.20)   14.39                80