Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/08/2021   06:24:29   (  -0.03, -75.19) (  -0.62, -72.59)  296.97                80
 04/09/2021   18:46:05   (   0.02, -75.20) (  -0.54, -77.80)  296.27                80
 04/10/2021   18:29:48   (   0.03, -75.20) (   0.48, -73.21)  227.31                80
 04/12/2021   06:51:16   (  -0.02, -75.22) (   0.69, -78.39)  361.83                80
 04/13/2021   06:29:38   (  -0.03, -75.22) (  -0.34, -73.80)  161.77                80
 04/14/2021   18:51:15   (   0.02, -75.24) (  -0.81, -79.02)  430.81                80
 04/15/2021   18:34:57   (   0.03, -75.25) (   0.21, -74.43)   93.26                80
 04/17/2021   06:56:26   (  -0.02, -75.27) (   0.96, -79.61)  494.91                80
 04/18/2021   06:34:48   (  -0.02, -75.28) (  -0.07, -75.02)   29.10                80
 04/20/2021   18:37:27   (   0.01, -75.31) (  -0.05, -75.65)   38.70                80
 04/21/2021   18:21:09   (   0.01, -75.32) (   0.99, -71.06)  486.03                80