Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2019   06:36:09   (   0.01, -75.21) (   0.26, -76.41)  136.86                80
 12/10/2019   06:14:34   (   0.01, -75.21) (  -0.76, -71.83)  385.00                80
 12/11/2019   18:36:13   (  -0.02, -75.22) (  -0.40, -77.07)  210.61                80
 12/12/2019   18:17:18   (  -0.01, -75.22) (   0.62, -72.50)  311.32                80
 12/14/2019   06:41:29   (   0.01, -75.23) (   0.57, -77.69)  280.97                80
 12/15/2019   06:19:54   (   0.01, -75.24) (  -0.45, -73.12)  240.89                80
 12/16/2019   18:44:13   (  -0.01, -75.25) (  -0.71, -78.35)  354.44                80
 12/17/2019   18:22:37   (   0.00, -75.26) (   0.32, -73.78)  167.88                80
 12/19/2019   06:46:50   (   0.00, -75.27) (   0.81, -78.99)  423.15                80
 12/20/2019   06:25:14   (  -0.00, -75.29) (  -0.21, -74.42)   99.54                80
 12/21/2019   18:49:33   (  -0.00, -75.31) (  -1.00, -79.64)  494.51                80