Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 18.  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) (   0.86, -78.98)  431.88                80
 12/20/2019   06:25:13   (  -0.01, -75.19) (  -0.17, -74.40)   89.59                80
 12/22/2019   18:30:37   (  -0.00, -75.20) (   0.03, -75.06)   16.26                80
 12/25/2019   06:33:13   (   0.01, -75.21) (   0.13, -75.68)   53.83                80
 12/26/2019   06:11:38   (   0.01, -75.22) (  -0.90, -71.11)  468.33                80
 12/27/2019   18:35:57   (  -0.01, -75.24) (  -0.27, -76.34)  126.18                80
 12/28/2019   18:14:21   (  -0.00, -75.25) (   0.75, -71.77)  396.47                80
 12/30/2019   06:38:34   (   0.00, -75.27) (   0.36, -76.98)  194.45                80
 12/31/2019   06:16:58   (  -0.01, -75.29) (  -0.66, -72.41)  328.56                80