Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/29/2020   06:20:44   (  -0.00, -75.21) (  -0.67, -72.25)  337.92                80
 12/30/2020   18:42:22   (   0.01, -75.21) (  -0.47, -77.47)  256.75                80
 12/31/2020   18:26:04   (   0.01, -75.22) (   0.52, -72.88)  265.92                80
 01/02/2021   06:47:33   (  -0.02, -75.22) (   0.63, -78.07)  324.80                80
 01/03/2021   06:25:57   (  -0.02, -75.22) (  -0.43, -73.49)  198.01                80
 01/04/2021   18:47:33   (   0.02, -75.23) (  -0.78, -78.70)  395.99                80
 01/05/2021   18:31:17   (   0.02, -75.24) (   0.28, -74.12)  127.45                80
 01/07/2021   06:52:46   (  -0.02, -75.25) (   0.86, -79.31)  461.73                80
 01/08/2021   06:31:09   (  -0.02, -75.26) (  -0.14, -74.72)   61.65                80
 01/10/2021   18:33:48   (   0.03, -75.28) (  -0.01, -75.35)    8.77                80