Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2019   06:46:49   (   0.00, -75.19) (   0.82, -78.98)  431.87                80
 12/20/2019   06:25:14   (  -0.00, -75.19) (  -0.20, -74.41)   89.67                80
 12/22/2019   18:30:37   (  -0.01, -75.20) (   0.00, -75.05)   16.71                80
 12/25/2019   06:33:14   (   0.01, -75.22) (   0.09, -75.69)   53.76                80
 12/26/2019   06:11:38   (   0.01, -75.22) (  -0.93, -71.12)  468.49                80
 12/27/2019   18:35:57   (  -0.01, -75.24) (  -0.24, -76.35)  125.86                80
 12/28/2019   18:14:22   (  -0.00, -75.26) (   0.79, -71.78)  396.81                80
 12/30/2019   06:38:33   (   0.00, -75.27) (   0.39, -76.98)  194.20                80
 12/31/2019   06:16:58   (  -0.00, -75.29) (  -0.64, -72.40)  328.82                80
 01/01/2020   18:41:17   (   0.00, -75.32) (  -0.53, -77.64)  264.20                80