Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2019   06:19:54   (   0.02, -75.19) (  -0.47, -73.12)  236.74                80
 12/16/2019   18:41:33   (   0.00, -75.20) (  -0.69, -78.36)  359.07                80
 12/17/2019   18:25:18   (   0.01, -75.21) (   0.33, -73.78)  162.70                80
 12/19/2019   06:46:49   (  -0.01, -75.21) (   0.85, -78.98)  429.82                80
 12/20/2019   06:25:13   (  -0.02, -75.22) (  -0.17, -74.40)   92.42                80
 12/22/2019   18:30:37   (   0.01, -75.25) (   0.03, -75.06)   20.99                80
 12/25/2019   06:33:13   (   0.00, -75.28) (   0.12, -75.69)   47.26                80
 12/26/2019   06:11:39   (  -0.00, -75.29) (  -0.96, -71.13)  475.77                80
 12/27/2019   18:35:58   (  -0.00, -75.32) (  -0.20, -76.36)  117.62                80
 12/28/2019   18:14:22   (   0.01, -75.34) (   0.82, -71.79)  405.83                80