Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/08/2019   22:06:18   (  -0.05,-128.26) (  -0.34,-129.45)  135.98                80
 05/09/2019   21:50:03   (  -0.06,-128.28) (   0.70,-124.88)  386.94                80
 05/11/2019   10:08:56   (   0.05,-128.30) (   0.46,-130.09)  204.52                80
 05/12/2019   09:52:41   (   0.06,-128.31) (  -0.58,-125.53)  318.01                80
 05/13/2019   22:11:42   (  -0.05,-128.33) (  -0.58,-130.77)  277.80                80
 05/14/2019   21:55:27   (  -0.06,-128.35) (   0.40,-126.19)  244.78                80
 05/16/2019   10:14:19   (   0.04,-128.37) (   0.75,-131.41)  346.91                80
 05/17/2019   09:58:05   (   0.05,-128.38) (  -0.29,-126.84)  175.25                80
 05/18/2019   22:17:06   (  -0.03,-128.39) (  -0.87,-132.09)  421.69                80
 05/19/2019   22:00:52   (  -0.04,-128.40) (   0.16,-127.52)  100.32                80
 05/21/2019   10:19:44   (   0.02,-128.42) (   0.98,-132.73)  491.88                80