Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/10/2021   18:57:34   (   0.05, -75.19) (  -0.71, -78.61)  389.31                80
 10/11/2021   18:35:55   (   0.06, -75.19) (   0.30, -74.01)  133.78                80
 10/13/2021   07:00:02   (  -0.05, -75.19) (   0.86, -79.18)  455.31                80
 10/14/2021   06:38:24   (  -0.06, -75.19) (  -0.22, -74.60)   68.01                80
 10/16/2021   18:43:41   (   0.06, -75.20) (   0.05, -75.21)    1.63                80
 10/19/2021   06:46:09   (  -0.06, -75.23) (   0.09, -75.78)   63.54                80
 10/20/2021   06:24:31   (  -0.06, -75.24) (  -0.99, -71.20)  461.15                80
 10/21/2021   18:48:47   (   0.05, -75.26) (  -0.20, -76.41)  129.95                80
 10/22/2021   18:27:08   (   0.05, -75.28) (   0.83, -71.81)  395.07                80