Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 12 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2019   18:27:57   (  -0.01, -75.19) (   0.04, -75.06)   15.88                80
 12/25/2019   06:33:13   (   0.01, -75.19) (   0.10, -75.69)   55.63                80
 12/26/2019   06:11:38   (   0.01, -75.20) (  -0.92, -71.11)  466.23                80
 12/27/2019   18:35:57   (  -0.01, -75.21) (  -0.24, -76.35)  128.61                80
 12/28/2019   18:14:21   (  -0.00, -75.22) (   0.79, -71.77)  393.69                80
 12/30/2019   06:38:33   (   0.00, -75.23) (   0.38, -76.97)  198.01                80
 12/31/2019   06:16:57   (  -0.00, -75.25) (  -0.65, -72.40)  324.67                80
 01/01/2020   18:41:17   (   0.00, -75.27) (  -0.52, -77.63)  268.76                80
 01/02/2020   18:19:41   (   0.01, -75.29) (   0.51, -73.06)  254.46                80