Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 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)
 07/01/2019   10:47:07   (  -0.02,-137.21) (   0.40,-139.05)  209.79                80
 07/02/2019   10:25:32   (  -0.02,-137.21) (  -0.64,-134.48)  310.80                80
 07/03/2019   22:47:13   (   0.01,-137.18) (  -0.55,-139.72)  289.47                80
 07/04/2019   22:30:57   (   0.01,-137.17) (   0.44,-135.14)  230.89                80
 07/06/2019   10:49:50   (  -0.01,-137.18) (   0.71,-140.35)  362.24                80
 07/07/2019   10:33:35   (   0.00,-137.17) (  -0.34,-135.79)  157.81                80
 07/08/2019   22:52:35   (   0.00,-137.13) (  -0.84,-141.03)  443.44                80
 07/09/2019   22:36:20   (  -0.00,-137.12) (   0.15,-136.45)   76.40                80
 07/12/2019   10:36:17   (  -0.00,-137.10) (   0.02,-137.08)    3.18                80
 07/14/2019   22:39:03   (   0.01,-137.04) (  -0.14,-137.76)   81.67                80