Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/13/2021   06:39:01   (  -0.02, -75.18) (   0.13, -75.95)   86.72                80
 01/14/2021   06:17:23   (  -0.02, -75.19) (  -0.87, -71.36)  436.23                80
 01/15/2021   18:39:00   (   0.02, -75.20) (  -0.29, -76.57)  156.63                80
 01/16/2021   18:22:44   (   0.02, -75.21) (   0.77, -72.00)  367.13                80
 01/18/2021   06:44:12   (  -0.03, -75.23) (   0.42, -77.18)  222.15                80
 01/19/2021   06:22:36   (  -0.03, -75.24) (  -0.64, -72.60)  301.92                80
 01/20/2021   18:44:13   (   0.03, -75.27) (  -0.52, -77.82)  289.86                80
 01/21/2021   18:27:56   (   0.03, -75.29) (   0.48, -73.23)  234.66                80
 01/23/2021   06:49:25   (  -0.04, -75.31) (   0.63, -78.42)  353.42                80
 01/24/2021   06:27:47   (  -0.04, -75.33) (  -0.37, -73.83)  171.04                80
 01/25/2021   18:49:25   (   0.04, -75.36) (  -0.80, -79.05)  420.57                80