Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2020   18:20:52   (  -0.01, -75.23) (   0.82, -71.65)  408.34                80
 12/28/2020   06:42:21   (   0.02, -75.24) (   0.40, -76.83)  180.88                80
 12/29/2020   06:20:44   (   0.02, -75.25) (  -0.66, -72.25)  342.86                80
 12/30/2020   18:42:21   (  -0.02, -75.27) (  -0.49, -77.47)  249.67                80
 12/31/2020   18:26:04   (  -0.02, -75.29) (   0.51, -72.88)  274.46                80
 01/02/2021   06:47:33   (   0.01, -75.31) (   0.64, -78.07)  313.99                80
 01/03/2021   06:25:57   (   0.00, -75.33) (  -0.42, -73.49)  209.98                80
 01/04/2021   18:47:34   (   0.01, -75.35) (  -0.73, -78.71)  382.17                80
 01/05/2021   18:31:17   (   0.01, -75.37) (   0.27, -74.12)  142.58                80
 01/07/2021   06:52:46   (  -0.01, -75.41) (   0.88, -79.31)  444.16                80
 01/08/2021   06:31:09   (  -0.01, -75.43) (  -0.18, -74.73)   80.66                80