Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/05/2021   18:24:38   (   0.03, -75.20) (   0.78, -72.00)  364.98                80
 04/07/2021   06:46:06   (  -0.02, -75.19) (   0.45, -77.17)  225.54                80
 04/08/2021   06:24:29   (  -0.02, -75.20) (  -0.64, -72.59)  297.61                80
 04/09/2021   18:46:04   (   0.02, -75.21) (  -0.59, -77.79)  295.21                80
 04/10/2021   18:29:48   (   0.02, -75.22) (   0.50, -73.22)  228.67                80
 04/12/2021   06:51:16   (  -0.02, -75.23) (   0.68, -78.39)  360.11                80
 04/13/2021   06:29:39   (  -0.02, -75.24) (  -0.35, -73.81)  163.77                80
 04/14/2021   18:51:15   (   0.02, -75.26) (  -0.81, -79.02)  428.41                80
 04/15/2021   18:34:58   (   0.02, -75.27) (   0.22, -74.43)   95.96                80
 04/17/2021   06:56:26   (  -0.02, -75.30) (   0.96, -79.61)  491.82                80
 04/18/2021   06:34:48   (  -0.02, -75.31) (  -0.07, -75.02)   32.46                80