Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2019   06:39:50   (  -0.02, -75.19) (   0.44, -77.29)  239.17                80
 09/11/2019   06:18:14   (  -0.01, -75.19) (  -0.56, -72.72)  282.15                80
 09/12/2019   18:39:54   (   0.01, -75.20) (  -0.62, -77.96)  314.70                80
 09/13/2019   18:23:40   (   0.00, -75.20) (   0.43, -73.39)  207.11                80
 09/15/2019   06:45:11   (  -0.00, -75.22) (   0.75, -78.59)  384.80                80
 09/16/2019   06:23:36   (  -0.00, -75.23) (  -0.25, -74.02)  137.26                80
 09/17/2019   18:45:17   (   0.00, -75.24) (  -0.87, -79.27)  458.77                80
 09/18/2019   18:29:02   (   0.00, -75.25) (   0.13, -74.69)   63.57                80
 09/21/2019   06:31:38   (  -0.00, -75.28) (  -0.01, -75.33)    5.67                80
 09/23/2019   18:31:43   (   0.00, -75.31) (  -0.17, -75.99)   78.66                80