Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2020   06:40:53   (   0.05, -75.19) (   0.59, -77.50)  263.43                80
 01/21/2020   06:19:17   (   0.05, -75.19) (  -0.44, -72.92)  258.32                80
 01/22/2020   18:43:38   (  -0.06, -75.21) (  -0.70, -78.16)  336.57                80
 01/23/2020   18:22:02   (  -0.06, -75.21) (   0.33, -73.59)  185.61                80
 01/25/2020   06:46:12   (   0.07, -75.21) (   0.85, -78.78)  406.25                80
 01/26/2020   06:24:37   (   0.07, -75.22) (  -0.18, -74.21)  116.30                80
 01/27/2020   18:48:56   (  -0.08, -75.25) (  -1.02, -79.44)  477.34                80
 01/28/2020   18:27:21   (  -0.07, -75.26) (   0.01, -74.86)   45.71                80
 01/31/2020   06:32:36   (   0.08, -75.30) (   0.13, -75.48)   21.25                80
 02/02/2020   18:35:20   (  -0.09, -75.35) (  -0.24, -76.15)   90.24                80