Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2019   10:28:18   (  -0.01,-137.21) (  -0.50,-135.13)  237.03                80
 06/17/2019   22:49:58   (   0.01,-137.17) (  -0.73,-140.37)  364.41                80
 06/18/2019   22:33:44   (   0.01,-137.17) (   0.32,-135.80)  156.03                80
 06/20/2019   10:55:15   (  -0.01,-137.18) (   0.87,-141.00)  435.83                80
 06/21/2019   10:33:41   (  -0.00,-137.17) (  -0.18,-136.43)   84.14                80
 06/23/2019   22:39:07   (  -0.00,-137.12) (   0.01,-137.10)    1.81                80
 06/26/2019   10:41:44   (   0.00,-137.11) (   0.14,-137.74)   71.47                80
 06/27/2019   10:20:08   (   0.01,-137.09) (  -0.84,-133.16)  447.72                80
 06/28/2019   22:41:49   (  -0.00,-137.03) (  -0.30,-138.41)  156.40                80
 06/29/2019   22:25:34   (  -0.00,-137.01) (   0.69,-133.83)  362.45                80