Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 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)
 07/08/2021   18:38:45   (   0.07, -75.14) (   0.03, -75.42)   31.13                80
 07/09/2021   18:22:27   (   0.07, -75.14) (   1.03, -70.82)  492.61                80
 07/11/2021   06:41:14   (  -0.08, -75.14) (   0.11, -76.00)   97.75                80
 07/12/2021   06:24:57   (  -0.08, -75.15) (  -0.94, -71.41)  426.05                80
 07/13/2021   18:43:53   (   0.09, -75.17) (  -0.23, -76.62)  165.87                80
 07/14/2021   18:27:35   (   0.08, -75.18) (   0.77, -72.03)  358.55                80
 07/16/2021   06:46:22   (  -0.09, -75.19) (   0.38, -77.20)  230.46                80
 07/17/2021   06:30:04   (  -0.09, -75.20) (  -0.67, -72.62)  294.03                80
 07/18/2021   18:49:01   (   0.10, -75.22) (  -0.48, -77.83)  297.36                80
 07/19/2021   18:32:43   (   0.10, -75.24) (   0.57, -73.25)  227.39                80
 07/21/2021   06:51:30   (  -0.11, -75.25) (   0.58, -78.42)  361.10                80