Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/26/2019   10:41:44   (  -0.00,-137.19) (   0.13,-137.74)   62.97                80
 06/27/2019   10:20:09   (   0.00,-137.18) (  -0.92,-133.17)  457.12                80
 06/28/2019   22:41:50   (   0.01,-137.15) (  -0.29,-138.41)  144.37                80
 06/29/2019   22:25:35   (   0.01,-137.13) (   0.76,-133.84)  375.34                80
 07/01/2019   10:47:06   (  -0.01,-137.13) (   0.44,-139.04)  218.57                80
 07/02/2019   10:25:32   (  -0.01,-137.11) (  -0.60,-134.48)  300.43                80
 07/03/2019   22:47:12   (   0.01,-137.06) (  -0.59,-139.71)  302.91                80
 07/04/2019   22:30:57   (   0.01,-137.04) (   0.40,-135.14)  215.93                80
 07/06/2019   10:49:49   (  -0.00,-137.02) (   0.75,-140.35)  378.93                80
 07/07/2019   10:33:35   (   0.00,-137.00) (  -0.30,-135.78)  139.51                80