Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/07/2021   06:46:06   (  -0.03, -75.19) (   0.44, -77.17)  225.94                80
 04/08/2021   06:24:28   (  -0.03, -75.19) (  -0.59, -72.58)  296.97                80
 04/09/2021   18:46:05   (   0.02, -75.20) (  -0.58, -77.79)  296.18                80
 04/10/2021   18:29:47   (   0.03, -75.21) (   0.45, -73.20)  227.46                80
 04/12/2021   06:51:16   (  -0.02, -75.22) (   0.67, -78.40)  361.70                80
 04/13/2021   06:29:39   (  -0.03, -75.23) (  -0.36, -73.81)  161.95                80
 04/14/2021   18:51:15   (   0.02, -75.24) (  -0.80, -79.02)  430.55                80
 04/15/2021   18:34:58   (   0.03, -75.25) (   0.23, -74.43)   93.59                80
 04/17/2021   06:56:26   (  -0.02, -75.27) (   0.95, -79.61)  494.59                80
 04/18/2021   06:34:49   (  -0.02, -75.28) (  -0.08, -75.02)   29.43                80
 04/20/2021   18:37:27   (   0.01, -75.31) (  -0.04, -75.65)   38.25                80