Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/07/2021   06:31:36   (  -0.11, -75.22) (  -0.63, -72.83)  271.93                80
 08/08/2021   18:50:33   (   0.12, -75.24) (  -0.49, -78.05)  320.10                80
 08/09/2021   18:34:14   (   0.12, -75.25) (   0.51, -73.46)  204.13                80
 08/11/2021   06:55:42   (  -0.13, -75.26) (   0.60, -78.64)  384.99                80
 08/12/2021   06:35:48   (  -0.13, -75.27) (  -0.40, -74.04)  139.46                24
 08/13/2021   18:55:39   (   0.13, -75.29) (  -0.77, -79.25)  451.67                80
 08/14/2021   18:39:22   (   0.13, -75.31) (   0.29, -74.67)   73.11                80
 08/17/2021   06:41:52   (  -0.14, -75.34) (  -0.17, -75.26)    9.38                80
 08/19/2021   18:41:49   (   0.15, -75.38) (   0.07, -75.88)   56.78                80
 08/20/2021   18:25:31   (   0.15, -75.40) (   1.07, -71.28)  468.57                80