Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/03/2021   06:49:51   (  -0.09, -75.19) (   0.28, -76.81)  184.28                80
 10/04/2021   06:28:13   (  -0.09, -75.20) (  -0.74, -72.22)  339.32                80
 10/05/2021   18:52:29   (   0.08, -75.21) (  -0.39, -77.43)  252.41                80
 10/06/2021   18:30:51   (   0.09, -75.22) (   0.62, -72.84)  271.69                80
 10/08/2021   06:54:57   (  -0.08, -75.22) (   0.55, -78.00)  316.89                80
 10/09/2021   06:33:19   (  -0.08, -75.23) (  -0.47, -73.41)  207.13                80
 10/10/2021   18:57:35   (   0.08, -75.25) (  -0.66, -78.62)  384.42                80
 10/11/2021   18:35:56   (   0.08, -75.26) (   0.36, -74.03)  139.78                80
 10/13/2021   07:00:03   (  -0.07, -75.27) (   0.81, -79.20)  448.15                80
 10/14/2021   06:38:24   (  -0.08, -75.28) (  -0.21, -74.60)   76.22                80
 10/16/2021   18:41:02   (   0.08, -75.32) (   0.10, -75.23)   10.67                80