Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/09/2021   18:34:14   (   0.12, -75.23) (   0.51, -73.45)  201.78                80
 08/11/2021   06:53:01   (  -0.13, -75.22) (   0.67, -78.63)  389.05                80
 08/12/2021   06:36:44   (  -0.12, -75.22) (  -0.39, -74.04)  134.16                80
 08/13/2021   18:55:39   (   0.13, -75.22) (  -0.78, -79.25)  459.07                80
 08/14/2021   18:39:22   (   0.13, -75.22) (   0.28, -74.66)   64.46                80
 08/17/2021   06:41:52   (  -0.14, -75.23) (  -0.16, -75.25)    3.41                80
 08/19/2021   18:41:48   (   0.15, -75.24) (  -0.00, -75.86)   71.74                80
 08/20/2021   18:25:31   (   0.15, -75.24) (   1.06, -71.28)  452.26                80
 08/22/2021   06:46:58   (  -0.16, -75.26) (   0.13, -76.45)  136.53                80