Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 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)
 12/10/2019   06:14:33   (   0.01, -75.22) (  -0.73, -71.83)  386.00                80
 12/11/2019   18:36:13   (  -0.02, -75.23) (  -0.43, -77.06)  209.04                80
 12/12/2019   18:19:57   (  -0.02, -75.24) (   0.60, -72.49)  313.29                80
 12/14/2019   06:41:29   (   0.03, -75.25) (   0.59, -77.69)  278.52                80
 12/15/2019   06:19:53   (   0.03, -75.26) (  -0.43, -73.11)  243.77                80
 12/16/2019   18:41:32   (  -0.03, -75.27) (  -0.72, -78.35)  351.00                80
 12/17/2019   18:25:17   (  -0.03, -75.28) (   0.30, -73.77)  171.72                80
 12/19/2019   06:46:48   (   0.04, -75.30) (   0.88, -78.97)  418.90                80
 12/20/2019   06:25:13   (   0.03, -75.32) (  -0.14, -74.40)  104.16                80
 12/21/2019   18:46:52   (  -0.04, -75.34) (  -1.01, -79.64)  489.57                80
 12/22/2019   18:30:37   (  -0.04, -75.36) (   0.01, -75.06)   33.94                80