Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2019   18:29:02   (   0.00, -75.20) (   0.14, -74.69)   59.19                80
 09/21/2019   06:31:38   (  -0.01, -75.21) (   0.02, -75.32)   12.76                80
 09/23/2019   18:31:43   (   0.01, -75.23) (  -0.15, -75.99)   87.00                80
 09/24/2019   18:15:28   (   0.01, -75.23) (   0.85, -71.42)  434.90                80
 09/26/2019   06:36:59   (  -0.01, -75.24) (   0.31, -76.62)  157.56                80
 09/27/2019   06:15:25   (  -0.01, -75.25) (  -0.75, -72.06)  364.70                80
 09/28/2019   18:37:05   (   0.01, -75.27) (  -0.44, -77.29)  230.06                80
 09/29/2019   18:20:50   (   0.00, -75.29) (   0.57, -72.72)  292.71                80
 10/01/2019   06:42:21   (  -0.00, -75.31) (   0.60, -77.92)  298.37                80