Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 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)
 10/01/2021   18:25:45   (   0.10, -75.20) (   0.87, -71.64)  405.51                80
 10/03/2021   06:49:52   (  -0.09, -75.20) (   0.25, -76.82)  184.30                80
 10/04/2021   06:28:13   (  -0.10, -75.20) (  -0.76, -72.22)  339.34                80
 10/05/2021   18:52:29   (   0.09, -75.22) (  -0.42, -77.43)  252.27                80
 10/06/2021   18:30:51   (   0.10, -75.22) (   0.65, -72.84)  271.88                80
 10/08/2021   06:54:57   (  -0.09, -75.23) (   0.52, -78.01)  316.64                80
 10/09/2021   06:33:19   (  -0.09, -75.24) (  -0.49, -73.42)  207.42                80
 10/10/2021   18:57:34   (   0.08, -75.25) (  -0.69, -78.62)  384.01                80
 10/11/2021   18:35:57   (   0.09, -75.26) (   0.38, -74.04)  140.24                80
 10/13/2021   07:00:03   (  -0.08, -75.27) (   0.79, -79.21)  447.63                80
 10/14/2021   06:38:25   (  -0.09, -75.29) (  -0.23, -74.61)   76.74                80