Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/13/2021   18:43:53   (   0.08, -75.17) (  -0.26, -76.61)  165.07                80
 07/14/2021   18:27:35   (   0.08, -75.18) (   0.79, -72.03)  358.74                80
 07/16/2021   06:46:22   (  -0.09, -75.18) (   0.36, -77.21)  230.86                80
 07/17/2021   06:30:04   (  -0.08, -75.18) (  -0.63, -72.61)  293.05                80
 07/18/2021   18:49:00   (   0.09, -75.20) (  -0.53, -77.82)  299.56                80
 07/19/2021   18:32:43   (   0.09, -75.21) (   0.53, -73.24)  224.57                80
 07/21/2021   06:51:30   (  -0.11, -75.22) (   0.63, -78.41)  364.53                80
 07/22/2021   06:35:13   (  -0.10, -75.23) (  -0.42, -73.83)  159.54                80
 07/23/2021   18:54:09   (   0.12, -75.24) (  -0.72, -79.04)  432.71                80
 07/24/2021   18:37:50   (   0.12, -75.26) (   0.27, -74.44)   92.09                80
 07/26/2021   06:56:39   (  -0.13, -75.28) (   0.83, -79.63)  495.41                80