Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/31/2019   10:38:06   (   0.01,-137.21) (  -0.03,-136.96)   29.07                80
 11/02/2019   22:38:11   (  -0.01,-137.21) (  -0.12,-137.62)   47.84                80
 11/03/2019   22:21:57   (  -0.01,-137.20) (   0.95,-133.06)  473.24                80
 11/05/2019   10:40:48   (   0.00,-137.21) (   0.22,-138.26)  119.84                80
 11/06/2019   10:24:32   (   0.00,-137.20) (  -0.79,-133.68)  400.97                80
 11/07/2019   22:43:32   (  -0.00,-137.19) (  -0.42,-138.91)  197.59                80
 11/08/2019   22:27:17   (  -0.00,-137.18) (   0.66,-134.35)  323.04                80
 11/10/2019   10:46:09   (   0.00,-137.17) (   0.52,-139.55)  270.85                80
 11/11/2019   10:29:53   (   0.00,-137.16) (  -0.49,-134.98)  249.32                80
 11/12/2019   22:48:52   (  -0.00,-137.14) (  -0.70,-140.21)  350.34                80
 11/13/2019   22:32:37   (   0.00,-137.12) (   0.31,-135.63)  169.30                80