Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2019   21:50:04   (  -0.06,-128.28) (   0.71,-124.89)  387.01                80
 05/11/2019   10:08:56   (   0.05,-128.30) (   0.44,-130.10)  204.37                80
 05/12/2019   09:52:41   (   0.06,-128.32) (  -0.59,-125.53)  318.22                80
 05/13/2019   22:11:43   (  -0.05,-128.34) (  -0.57,-130.78)  277.59                80
 05/14/2019   21:55:27   (  -0.06,-128.35) (   0.41,-126.20)  245.03                80
 05/16/2019   10:14:20   (   0.04,-128.37) (   0.74,-131.41)  346.55                80
 05/17/2019   09:58:05   (   0.05,-128.38) (  -0.30,-126.84)  175.63                80
 05/18/2019   22:17:06   (  -0.03,-128.40) (  -0.87,-132.09)  421.29                80
 05/19/2019   22:00:52   (  -0.04,-128.40) (   0.17,-127.52)  100.77                80
 05/21/2019   10:19:44   (   0.02,-128.42) (   0.97,-132.74)  491.34                80
 05/22/2019   10:03:29   (   0.03,-128.43) (  -0.01,-128.16)   30.46                80