Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2019   18:30:36   (  -0.01, -75.19) (   0.00, -75.05)   15.96                80
 12/25/2019   06:33:12   (   0.02, -75.19) (   0.15, -75.68)   55.59                80
 12/26/2019   06:11:37   (   0.01, -75.20) (  -0.88, -71.10)  466.25                80
 12/27/2019   18:35:56   (  -0.01, -75.21) (  -0.28, -76.34)  128.60                80
 12/28/2019   18:14:21   (  -0.00, -75.22) (   0.75, -71.76)  393.66                80
 12/30/2019   06:38:32   (   0.00, -75.23) (   0.42, -76.96)  198.24                80
 12/31/2019   06:16:58   (  -0.01, -75.24) (  -0.67, -72.40)  324.46                80
 01/01/2020   18:41:17   (   0.01, -75.27) (  -0.49, -77.64)  268.99                80
 01/02/2020   18:19:41   (   0.01, -75.29) (   0.54, -73.06)  254.25                80
 01/04/2020   06:43:52   (  -0.01, -75.31) (   0.68, -78.25)  336.03                80