Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2021   06:33:38   (  -0.05, -75.13) (  -0.38, -73.58)  176.32                80
 07/02/2021   18:52:35   (   0.06, -75.14) (  -0.75, -78.80)  416.80                80
 07/03/2021   18:36:17   (   0.06, -75.15) (   0.24, -74.20)  107.07                80
 07/05/2021   06:55:04   (  -0.07, -75.15) (   0.89, -79.38)  482.48                80
 07/06/2021   06:38:47   (  -0.07, -75.16) (  -0.16, -74.79)   41.30                80
 07/08/2021   18:38:45   (   0.08, -75.18) (   0.03, -75.42)   27.34                80
 07/09/2021   18:22:28   (   0.08, -75.19) (   1.08, -70.83)  496.92                80
 07/11/2021   06:41:15   (  -0.09, -75.20) (   0.06, -76.01)   91.82                80
 07/12/2021   06:24:57   (  -0.09, -75.21) (  -0.93, -71.41)  432.60                80
 07/13/2021   18:43:53   (   0.10, -75.23) (  -0.24, -76.62)  159.29                80
 07/14/2021   18:27:36   (   0.09, -75.25) (   0.81, -72.04)  365.77                80