Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2021   06:43:52   (   0.00, -75.18) (   0.10, -75.49)   36.32                80
 12/07/2021   06:28:10   (   0.00, -75.18) (  -0.95, -71.05)  470.58                80
 12/08/2021   18:48:01   (  -0.00, -75.18) (  -0.32, -76.48)  148.09                80
 12/09/2021   18:32:19   (  -0.00, -75.19) (   0.73, -72.04)  359.37                80
 12/11/2021   06:54:39   (  -0.00, -75.20) (   0.52, -77.42)  254.26                80
 12/12/2021   06:33:38   (   0.00, -75.21) (  -0.53, -72.99)  253.72                80
 12/13/2021   18:56:08   (   0.00, -75.23) (  -0.73, -78.41)  363.31                80
 12/14/2021   18:40:26   (  -0.00, -75.24) (   0.26, -73.96)  145.15                80
 12/16/2021   07:02:47   (   0.00, -75.27) (   0.94, -79.36)  467.08                80
 12/17/2021   06:41:45   (   0.01, -75.28) (  -0.05, -74.91)   41.56                80
 12/19/2021   18:45:53   (  -0.00, -75.32) (  -0.15, -75.90)   66.32                80