Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2019   18:25:33   (   0.00, -75.20) (   0.17, -74.50)   80.61                80
 12/04/2019   06:30:49   (  -0.01, -75.20) (  -0.00, -75.12)    8.87                80
 12/06/2019   18:33:33   (   0.01, -75.20) (  -0.14, -75.78)   66.21                80
 12/07/2019   18:11:57   (   0.02, -75.21) (   0.88, -71.20)  455.73                80
 12/09/2019   06:36:10   (  -0.01, -75.22) (   0.25, -76.42)  136.15                80
 12/10/2019   06:14:34   (  -0.01, -75.23) (  -0.77, -71.84)  385.95                80
 12/11/2019   18:38:53   (  -0.00, -75.23) (  -0.39, -77.08)  209.34                80
 12/12/2019   18:17:18   (   0.00, -75.24) (   0.64, -72.50)  312.82                80
 12/14/2019   06:41:29   (   0.00, -75.25) (   0.55, -77.70)  278.83                80