Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/23/2020   06:37:10   (  -0.02, -75.20) (   0.05, -75.61)   46.56                80
 12/24/2020   06:15:32   (  -0.02, -75.21) (  -0.95, -71.02)  477.48                80
 12/25/2020   18:37:08   (  -0.00, -75.23) (  -0.26, -76.23)  114.17                80
 12/26/2020   18:20:52   (  -0.01, -75.25) (   0.79, -71.65)  410.35                80
 12/28/2020   06:42:21   (   0.02, -75.27) (   0.37, -76.83)  178.06                80
 12/29/2020   06:20:45   (   0.02, -75.29) (  -0.68, -72.26)  346.15                80
 12/30/2020   18:42:21   (  -0.02, -75.31) (  -0.52, -77.46)  245.85                80
 12/31/2020   18:26:05   (  -0.02, -75.33) (   0.53, -72.89)  278.74                80
 01/02/2021   06:47:34   (   0.01, -75.36) (   0.63, -78.07)  308.84                80
 01/03/2021   06:25:57   (   0.01, -75.38) (  -0.42, -73.49)  215.65                80
 01/04/2021   18:47:35   (   0.00, -75.41) (  -0.72, -78.72)  375.89                80