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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2020   06:45:40   (   0.00, -75.14) (   0.60, -77.71)  292.92                80
 12/13/2020   06:24:04   (   0.00, -75.14) (  -0.45, -73.13)  229.03                80
 12/14/2020   18:45:41   (  -0.00, -75.14) (  -0.70, -78.35)  365.54                80
 12/15/2020   18:29:23   (   0.00, -75.14) (   0.29, -73.76)  156.74                80
 12/17/2020   06:50:54   (  -0.01, -75.13) (   0.82, -78.96)  435.24                80
 12/18/2020   06:29:16   (  -0.01, -75.13) (  -0.17, -74.37)   87.36                80
 12/20/2020   18:34:36   (   0.02, -75.16) (   0.03, -75.00)   17.57                80
 12/23/2020   06:37:09   (  -0.02, -75.18) (   0.09, -75.61)   48.87                80
 12/24/2020   06:15:32   (  -0.02, -75.19) (  -0.97, -71.03)  474.91                80
 12/25/2020   18:37:09   (   0.03, -75.22) (  -0.23, -76.24)  117.08                80