Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2019   10:44:29   (   0.01,-137.21) (   0.28,-138.39)  133.93                80
 06/11/2019   10:22:55   (   0.01,-137.21) (  -0.76,-133.82)  387.00                80
 06/12/2019   22:44:36   (  -0.01,-137.18) (  -0.40,-139.07)  213.93                80
 06/13/2019   22:28:20   (  -0.01,-137.18) (   0.58,-134.49)  306.77                80
 06/15/2019   10:49:53   (  -0.00,-137.20) (   0.55,-139.70)  284.72                80
 06/16/2019   10:28:17   (  -0.00,-137.19) (  -0.44,-135.12)  235.45                80
 06/17/2019   22:49:59   (   0.01,-137.15) (  -0.72,-140.37)  366.86                80
 06/18/2019   22:33:44   (   0.00,-137.14) (   0.33,-135.80)  153.28                80
 06/20/2019   10:52:35   (  -0.00,-137.16) (   0.87,-141.00)  438.73                80
 06/21/2019   10:36:21   (   0.00,-137.14) (  -0.18,-136.44)   81.03                80