Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2021   18:32:42   (   0.08, -75.20) (   0.51, -73.23)  224.01                80
 07/21/2021   06:51:30   (  -0.09, -75.20) (   0.64, -78.41)  365.87                80
 07/22/2021   06:35:12   (  -0.09, -75.20) (  -0.41, -73.82)  157.37                80
 07/23/2021   18:54:08   (   0.11, -75.20) (  -0.74, -79.03)  436.56                80
 07/24/2021   18:37:50   (   0.10, -75.21) (   0.26, -74.44)   87.41                80
 07/27/2021   06:39:03   (  -0.11, -75.24) (  -0.15, -75.03)   23.63                 3
 07/29/2021   18:40:18   (   0.11, -75.27) (   0.01, -75.64)   43.62                80
 07/30/2021   18:24:00   (   0.11, -75.28) (   1.07, -71.06)  481.66                80
 08/01/2021   06:42:47   (  -0.12, -75.32) (   0.11, -76.23)  104.93                80