Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2021   18:49:01   (   0.08, -75.21) (  -0.48, -77.83)  298.17                80
 07/19/2021   18:32:42   (   0.08, -75.22) (   0.51, -73.23)  226.24                80
 07/21/2021   06:54:10   (  -0.10, -75.23) (   0.64, -78.41)  362.11                80
 07/22/2021   06:33:43   (  -0.09, -75.24) (  -0.41, -73.82)  162.21                 9
 07/23/2021   18:54:09   (   0.11, -75.26) (  -0.74, -79.04)  429.89                80
 07/24/2021   18:37:51   (   0.10, -75.28) (   0.32, -74.45)   95.21                80
 07/26/2021   06:59:18   (  -0.11, -75.31) (   0.84, -79.63)  491.46                80
 07/27/2021   06:37:40   (  -0.11, -75.33) (  -0.15, -75.03)   34.12                80
 07/29/2021   18:40:19   (   0.11, -75.39) (   0.08, -75.66)   30.32                80
 07/30/2021   18:24:00   (   0.11, -75.42) (   1.07, -71.06)  496.09                80