Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/18/2019   06:13:24   (   0.00, -75.18) (  -0.84, -71.42)  428.48                80
 05/19/2019   18:35:05   (  -0.00, -75.17) (  -0.33, -76.67)  169.92                80
 05/20/2019   18:18:51   (   0.00, -75.17) (   0.71, -72.10)  350.69                80
 05/22/2019   06:40:22   (  -0.01, -75.17) (   0.49, -77.30)  243.19                80
 05/23/2019   06:18:47   (  -0.01, -75.17) (  -0.55, -72.73)  277.63                80
 05/24/2019   18:40:29   (   0.01, -75.17) (  -0.61, -77.98)  319.95                80
 05/25/2019   18:24:14   (   0.02, -75.18) (   0.43, -73.41)  201.49                80
 05/27/2019   06:45:45   (  -0.02, -75.19) (   0.76, -78.61)  390.79                80
 05/28/2019   06:24:11   (  -0.02, -75.20) (  -0.28, -74.05)  130.93                80
 05/29/2019   18:45:52   (   0.02, -75.21) (  -0.88, -79.30)  465.57                80
 05/30/2019   18:29:38   (   0.02, -75.22) (   0.16, -74.73)   56.67                80