Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 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)
 07/11/2021   06:41:14   (  -0.08, -75.15) (   0.10, -76.00)   96.40                80
 07/12/2021   06:24:56   (  -0.07, -75.16) (  -0.89, -71.40)  427.89                80
 07/13/2021   18:43:53   (   0.08, -75.19) (  -0.22, -76.63)  163.26                80
 07/14/2021   18:27:35   (   0.08, -75.20) (   0.77, -72.03)  361.64                80
 07/16/2021   06:46:22   (  -0.09, -75.22) (   0.38, -77.20)  226.70                80
 07/17/2021   06:30:05   (  -0.08, -75.24) (  -0.67, -72.62)  298.26                80
 07/18/2021   18:49:01   (   0.10, -75.27) (  -0.49, -77.83)  292.38                80
 07/19/2021   18:32:44   (   0.09, -75.29) (   0.56, -73.25)  232.81                80
 07/21/2021   06:51:31   (  -0.11, -75.31) (   0.60, -78.42)  354.98                80
 07/22/2021   06:35:13   (  -0.11, -75.33) (  -0.45, -73.84)  170.14                80
 07/23/2021   18:54:10   (   0.12, -75.36) (  -0.70, -79.05)  420.22                80