Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2021   06:48:26   (  -0.13, -75.19) (   0.19, -76.64)  165.24                80
 09/13/2021   06:26:48   (  -0.13, -75.18) (  -0.82, -72.04)  356.74                80
 09/14/2021   18:48:23   (   0.13, -75.16) (  -0.35, -77.25)  239.03                80
 09/15/2021   18:32:06   (   0.14, -75.15) (   0.72, -72.67)  283.25                80
 09/17/2021   06:53:33   (  -0.14, -75.14) (   0.44, -77.84)  306.97                80
 09/18/2021   06:31:54   (  -0.15, -75.14) (  -0.56, -73.24)  215.77                80
 09/19/2021   18:56:10   (   0.14, -75.13) (  -0.60, -78.45)  378.51                80
 09/20/2021   18:37:11   (   0.15, -75.13) (   0.40, -73.85)  145.01                80
 09/22/2021   06:58:39   (  -0.14, -75.15) (   0.75, -79.03)  443.13                80
 09/23/2021   06:37:01   (  -0.15, -75.15) (  -0.32, -74.45)   80.67                80