Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2019   10:38:54   (  -0.03,-137.21) (   0.09,-137.75)   61.54                80
 08/03/2019   10:22:39   (  -0.03,-137.21) (  -0.96,-133.18)  459.42                80
 08/04/2019   22:41:39   (   0.04,-137.20) (  -0.24,-138.41)  138.36                80
 08/05/2019   22:25:24   (   0.04,-137.20) (   0.81,-133.85)  382.46                80
 08/07/2019   10:44:16   (  -0.04,-137.19) (   0.36,-139.06)  211.79                80
 08/08/2019   10:28:01   (  -0.04,-137.19) (  -0.63,-134.48)  308.61                80
 08/09/2019   22:47:01   (   0.05,-137.17) (  -0.51,-139.72)  290.31                80
 08/10/2019   22:30:46   (   0.05,-137.16) (   0.48,-135.15)  229.73                80
 08/12/2019   10:49:39   (  -0.06,-137.15) (   0.63,-140.37)  365.66                80
 08/13/2019   10:33:24   (  -0.06,-137.14) (  -0.36,-135.79)  154.06                80
 08/14/2019   22:52:23   (   0.07,-137.11) (  -0.83,-141.02)  445.80                80