Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/20/2019   10:46:20   (   0.00,-137.20) (   0.37,-138.95)  199.76                80
 10/21/2019   10:24:45   (   0.00,-137.19) (  -0.64,-134.38)  320.80                80
 10/22/2019   22:46:25   (   0.00,-137.18) (  -0.54,-139.62)  277.51                80
 10/23/2019   22:30:10   (   0.00,-137.17) (   0.47,-135.04)  242.81                80
 10/25/2019   10:51:41   (   0.00,-137.15) (   0.68,-140.25)  352.04                80
 10/26/2019   10:30:05   (   0.00,-137.14) (  -0.33,-135.67)  167.96                80
 10/27/2019   22:51:46   (  -0.00,-137.13) (  -0.84,-140.91)  431.14                80
 10/28/2019   22:35:30   (  -0.00,-137.11) (   0.17,-136.33)   88.62                80
 10/31/2019   10:35:26   (   0.00,-137.07) (  -0.02,-136.96)   12.13                80