Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 9 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)
 09/19/2020   06:37:45   (  -0.03, -75.20) (   0.19, -76.15)  109.02                80
 09/20/2020   06:16:09   (  -0.03, -75.21) (  -0.83, -71.57)  414.11                80
 09/21/2020   18:37:47   (   0.03, -75.23) (  -0.34, -76.80)  178.79                80
 09/22/2020   18:21:32   (   0.04, -75.25) (   0.74, -72.23)  344.54                80
 09/24/2020   06:43:01   (  -0.04, -75.25) (   0.43, -77.42)  246.20                80
 09/25/2020   06:21:25   (  -0.05, -75.27) (  -0.59, -72.84)  277.29                80
 09/26/2020   18:43:03   (   0.05, -75.30) (  -0.58, -78.06)  314.86                80
 09/27/2020   18:26:46   (   0.05, -75.32) (   0.44, -73.48)  209.28                80
 09/29/2020   06:48:17   (  -0.06, -75.34) (   0.67, -78.68)  379.73                80
 09/30/2020   06:26:40   (  -0.06, -75.37) (  -0.36, -74.10)  144.88                80
 10/01/2020   18:48:18   (   0.06, -75.41) (  -0.82, -79.32)  445.74                80
 10/02/2020   18:32:02   (   0.06, -75.44) (   0.20, -74.74)   79.38                80