Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 1 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)
 01/21/2020   06:19:18   (   0.05, -75.19) (  -0.47, -72.93)  258.19                80
 01/22/2020   18:43:37   (  -0.06, -75.20) (  -0.73, -78.16)  336.79                80
 01/23/2020   18:22:02   (  -0.06, -75.21) (   0.30, -73.58)  185.27                80
 01/25/2020   06:46:12   (   0.07, -75.21) (   0.87, -78.78)  406.75                80
 01/26/2020   06:24:36   (   0.07, -75.22) (  -0.16, -74.20)  115.68                80
 01/27/2020   18:48:56   (  -0.08, -75.24) (  -1.04, -79.43)  478.00                80
 01/28/2020   18:27:20   (  -0.07, -75.26) (  -0.01, -74.86)   45.03                80
 01/31/2020   06:32:35   (   0.08, -75.29) (   0.14, -75.48)   22.34                80
 02/02/2020   18:35:20   (  -0.09, -75.34) (  -0.24, -76.15)   91.37                80
 02/03/2020   18:13:44   (  -0.08, -75.36) (   0.79, -71.57)  432.30                80