Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2019   21:58:08   (   0.00,-128.42) (   0.35,-126.89)  175.31                80
 06/06/2019   10:16:59   (  -0.02,-128.40) (   0.83,-132.09)  420.60                80
 06/07/2019   10:00:45   (  -0.01,-128.39) (  -0.21,-127.52)   99.21                80
 06/09/2019   22:03:31   (   0.01,-128.36) (   0.02,-128.19)   19.17                80
 06/12/2019   10:03:29   (  -0.02,-128.33) (   0.06,-128.84)   57.74                80
 06/13/2019   09:47:13   (  -0.01,-128.31) (  -0.92,-124.26)  461.70                80
 06/14/2019   22:06:14   (   0.04,-128.28) (  -0.24,-129.51)  139.49                80
 06/15/2019   21:50:00   (   0.03,-128.27) (   0.80,-124.94)  379.85                80
 06/17/2019   10:08:51   (  -0.05,-128.24) (   0.39,-130.14)  217.12                80
 06/18/2019   09:52:37   (  -0.04,-128.22) (  -0.65,-125.57)  301.72                80