Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2019   06:41:29   (   0.01, -75.19) (   0.56, -77.69)  284.92                80
 12/15/2019   06:19:54   (   0.00, -75.19) (  -0.46, -73.12)  236.32                80
 12/16/2019   18:41:33   (   0.00, -75.20) (  -0.70, -78.35)  359.52                80
 12/17/2019   18:25:17   (   0.01, -75.20) (   0.32, -73.78)  162.28                80
 12/19/2019   06:46:50   (  -0.01, -75.21) (   0.81, -78.99)  429.95                80
 12/20/2019   06:25:14   (  -0.02, -75.22) (  -0.22, -74.41)   92.23                80
 12/22/2019   18:27:58   (   0.01, -75.25) (   0.08, -75.07)   20.57                80
 12/25/2019   06:33:14   (  -0.00, -75.28) (   0.08, -75.70)   47.61                80
 12/26/2019   06:11:38   (  -0.01, -75.29) (  -0.94, -71.12)  475.27                80