Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2019   06:18:47   (   0.00, -75.18) (  -0.54, -72.73)  279.16                80
 05/24/2019   18:40:29   (   0.00, -75.19) (  -0.63, -77.98)  317.21                80
 05/25/2019   18:24:14   (   0.00, -75.20) (   0.41, -73.41)  204.51                80
 05/27/2019   06:45:45   (  -0.01, -75.21) (   0.78, -78.61)  388.03                80
 05/28/2019   06:24:11   (  -0.01, -75.22) (  -0.26, -74.04)  133.97                80
 05/29/2019   18:45:52   (   0.01, -75.24) (  -0.92, -79.29)  461.41                80
 05/30/2019   18:29:38   (   0.01, -75.26) (   0.12, -74.72)   61.03                80
 06/02/2019   06:32:16   (  -0.02, -75.29) (  -0.03, -75.37)    8.57                80
 06/04/2019   18:32:21   (   0.03, -75.33) (  -0.16, -76.04)   80.79                80
 06/05/2019   18:16:07   (   0.03, -75.35) (   0.88, -71.47)  441.93                80