Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 4 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/22/2019   18:45:55   (   0.00, -75.20) (  -0.92, -79.24)  460.46                80
 04/23/2019   18:29:40   (   0.00, -75.20) (   0.11, -74.67)   60.61                80
 04/26/2019   06:32:18   (  -0.00, -75.21) (   0.04, -75.31)   12.45                80
 04/28/2019   18:32:25   (   0.00, -75.23) (  -0.15, -75.99)   86.16                80
 04/29/2019   18:16:10   (   0.00, -75.24) (   0.88, -71.43)  435.93                80
 05/01/2019   06:37:43   (  -0.00, -75.26) (   0.30, -76.63)  156.64                80
 05/02/2019   06:16:08   (  -0.00, -75.27) (  -0.74, -72.07)  365.62                80
 05/03/2019   18:37:48   (   0.00, -75.30) (  -0.47, -77.30)  228.99                80
 05/04/2019   18:21:34   (   0.00, -75.32) (   0.57, -72.74)  293.65                80