Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/09/2021   06:33:19   (  -0.06, -75.20) (  -0.50, -73.41)  205.04                80
 10/10/2021   18:57:34   (   0.05, -75.20) (  -0.69, -78.61)  388.18                80
 10/11/2021   18:35:56   (   0.06, -75.21) (   0.32, -74.02)  135.28                80
 10/13/2021   07:00:02   (  -0.05, -75.21) (   0.84, -79.19)  453.24                80
 10/14/2021   06:38:24   (  -0.06, -75.22) (  -0.18, -74.59)   70.49                80
 10/16/2021   18:41:01   (   0.06, -75.24) (   0.07, -75.21)    2.65                80
 10/19/2021   06:46:09   (  -0.06, -75.27) (   0.07, -75.79)   58.95                80
 10/20/2021   06:24:32   (  -0.06, -75.29) (  -1.01, -71.21)  466.13                80
 10/21/2021   18:48:47   (   0.05, -75.32) (  -0.18, -76.41)  124.24                80
 10/22/2021   18:27:09   (   0.05, -75.34) (   0.84, -71.82)  401.19                80