Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2019   06:37:29   (  -0.01, -75.20) (   0.34, -76.67)  167.72                80
 07/15/2019   06:15:54   (  -0.01, -75.20) (  -0.71, -72.10)  353.54                80
 07/16/2019   18:37:34   (   0.02, -75.20) (  -0.46, -77.34)  243.62                80
 07/17/2019   18:21:20   (   0.01, -75.21) (   0.59, -72.78)  278.20                80
 07/19/2019   06:42:52   (  -0.02, -75.23) (   0.58, -77.98)  313.51                80
 07/20/2019   06:21:17   (  -0.01, -75.24) (  -0.41, -73.40)  208.70                80
 07/21/2019   18:42:57   (   0.01, -75.25) (  -0.75, -78.65)  387.15                80
 07/22/2019   18:26:43   (   0.01, -75.27) (   0.30, -74.08)  135.58                80
 07/24/2019   06:48:15   (  -0.01, -75.30) (   0.87, -79.29)  454.89                80
 07/25/2019   06:26:40   (  -0.01, -75.31) (  -0.12, -74.71)   68.03                80
 07/27/2019   18:32:05   (   0.01, -75.35) (   0.02, -75.39)    4.44                80