Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/05/2021   06:55:04   (  -0.07, -75.12) (   0.92, -79.37)  484.97                80
 07/06/2021   06:38:46   (  -0.07, -75.13) (  -0.13, -74.79)   38.32                80
 07/08/2021   18:38:45   (   0.08, -75.14) (   0.00, -75.41)   31.22                80
 07/09/2021   18:22:27   (   0.07, -75.15) (   1.05, -70.83)  492.53                80
 07/11/2021   06:41:15   (  -0.08, -75.15) (   0.09, -76.00)   97.41                80
 07/12/2021   06:24:56   (  -0.08, -75.15) (  -0.90, -71.41)  426.49                80
 07/13/2021   18:43:54   (   0.09, -75.17) (  -0.21, -76.63)  165.70                80
 07/14/2021   18:27:35   (   0.09, -75.18) (   0.79, -72.03)  358.83                80
 07/16/2021   06:46:22   (  -0.10, -75.20) (   0.37, -77.21)  229.72                80
 07/17/2021   06:30:05   (  -0.09, -75.21) (  -0.68, -72.62)  294.85                80