Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/30/2019   21:52:44   (  -0.02,-128.45) (   0.60,-125.57)  328.22                80
 06/01/2019   10:11:36   (   0.01,-128.44) (   0.52,-130.78)  267.15                80
 06/02/2019   09:55:21   (   0.01,-128.43) (  -0.46,-126.20)  253.20                80
 06/03/2019   22:14:23   (   0.01,-128.42) (  -0.65,-131.46)  345.90                80
 06/04/2019   21:58:08   (   0.00,-128.41) (   0.33,-126.88)  174.22                80
 06/06/2019   10:17:00   (  -0.02,-128.39) (   0.79,-132.10)  422.13                80
 06/07/2019   10:00:44   (  -0.01,-128.38) (  -0.19,-127.52)   97.38                80
 06/09/2019   22:03:30   (   0.02,-128.34) (   0.02,-128.19)   16.68                80
 06/12/2019   10:03:27   (  -0.02,-128.30) (   0.12,-128.82)   60.91                80