Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/06/2019   10:17:00   (  -0.02,-128.41) (   0.81,-132.09)  420.50                80
 06/07/2019   10:00:45   (  -0.01,-128.39) (  -0.23,-127.53)   99.37                80
 06/09/2019   22:03:31   (   0.01,-128.36) (   0.04,-128.19)   19.16                80
 06/12/2019   10:03:28   (  -0.02,-128.33) (   0.11,-128.83)   57.42                80
 06/13/2019   09:47:13   (  -0.01,-128.31) (  -0.93,-124.26)  462.03                80
 06/14/2019   22:06:15   (   0.04,-128.29) (  -0.24,-129.51)  139.16                80
 06/15/2019   21:50:00   (   0.03,-128.27) (   0.80,-124.94)  380.20                80
 06/17/2019   10:08:52   (  -0.05,-128.24) (   0.39,-130.14)  216.69                80
 06/18/2019   09:52:37   (  -0.04,-128.22) (  -0.64,-125.57)  302.17                80