Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/17/2021   18:39:51   (   0.03, -75.26) (   0.03, -75.18)    9.07                80
 06/20/2021   06:39:41   (  -0.04, -75.25) (   0.07, -75.77)   58.65                80
 06/21/2021   06:23:23   (  -0.03, -75.25) (  -0.98, -71.18)  464.65                80
 06/22/2021   18:42:19   (   0.05, -75.27) (  -0.21, -76.39)  128.42                80
 06/23/2021   18:26:02   (   0.04, -75.27) (   0.84, -71.81)  395.10                80
 06/25/2021   06:44:49   (  -0.05, -75.27) (   0.30, -76.98)  195.04                80
 06/26/2021   06:28:31   (  -0.05, -75.27) (  -0.69, -72.38)  328.71                80
 06/27/2021   18:47:28   (   0.06, -75.29) (  -0.44, -77.61)  263.60                80
 06/28/2021   18:31:10   (   0.06, -75.30) (   0.55, -73.01)  260.94                80
 06/30/2021   06:49:57   (  -0.06, -75.32) (   0.59, -78.19)  327.25                80