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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/08/2021   18:50:33   (   0.12, -75.24) (  -0.49, -78.05)  319.99                80
 08/09/2021   18:34:14   (   0.12, -75.25) (   0.51, -73.45)  204.24                80
 08/11/2021   06:55:42   (  -0.13, -75.26) (   0.61, -78.64)  384.82                80
 08/12/2021   06:34:04   (  -0.12, -75.27) (  -0.39, -74.04)  139.63                80
 08/13/2021   18:55:39   (   0.13, -75.29) (  -0.78, -79.25)  451.57                80
 08/14/2021   18:39:22   (   0.13, -75.31) (   0.28, -74.67)   73.19                80
 08/17/2021   06:41:52   (  -0.14, -75.34) (  -0.16, -75.25)    9.52                80
 08/19/2021   18:41:49   (   0.15, -75.38) (   0.07, -75.88)   56.70                80
 08/20/2021   18:25:31   (   0.15, -75.39) (   1.07, -71.28)  468.64                80