Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 10 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/22/2019   06:44:51   (   0.00, -75.20) (   0.73, -78.53)  378.75                80
 10/23/2019   06:23:15   (   0.00, -75.20) (  -0.27, -73.95)  142.81                80
 10/24/2019   18:44:56   (  -0.00, -75.22) (  -0.91, -79.19)  452.56                80
 10/25/2019   18:28:41   (  -0.00, -75.23) (   0.16, -74.62)   69.62                80
 10/28/2019   06:28:37   (  -0.00, -75.25) (  -0.01, -75.25)    1.42                80
 10/30/2019   18:31:22   (   0.00, -75.29) (  -0.14, -75.92)   71.98                80
 10/31/2019   18:15:06   (  -0.00, -75.30) (   0.87, -71.34)  450.92                80
 11/02/2019   06:36:38   (   0.00, -75.32) (   0.30, -76.54)  140.22                80
 11/03/2019   06:15:03   (   0.01, -75.34) (  -0.76, -71.98)  382.98                80