Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 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)
 09/18/2021   06:31:54   (  -0.12, -75.20) (  -0.58, -73.24)  223.73                80
 09/19/2021   18:53:30   (   0.12, -75.20) (  -0.59, -78.45)  370.01                80
 09/20/2021   18:37:11   (   0.12, -75.20) (   0.42, -73.85)  153.61                80
 09/22/2021   06:58:39   (  -0.11, -75.21) (   0.73, -79.03)  434.75                80
 09/23/2021   06:37:00   (  -0.12, -75.22) (  -0.28, -74.43)   89.12                80
 09/25/2021   18:39:38   (   0.12, -75.23) (   0.18, -75.06)   20.82                80
 09/28/2021   06:44:47   (  -0.12, -75.26) (  -0.05, -75.64)   42.48                80
 09/29/2021   06:23:08   (  -0.12, -75.27) (  -1.06, -71.04)  481.77                80
 09/30/2021   18:47:24   (   0.12, -75.29) (  -0.11, -76.25)  110.26                80
 10/01/2021   18:25:46   (   0.13, -75.30) (   0.96, -71.67)  414.42                80