Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/12/2021   06:36:44   (  -0.12, -75.22) (  -0.38, -74.04)  134.98                80
 08/13/2021   18:55:39   (   0.12, -75.23) (  -0.79, -79.24)  458.29                80
 08/14/2021   18:39:22   (   0.12, -75.23) (   0.27, -74.66)   65.44                80
 08/17/2021   06:41:51   (  -0.13, -75.24) (  -0.15, -75.25)    1.56                80
 08/19/2021   18:41:48   (   0.14, -75.25) (  -0.02, -75.86)   69.71                80
 08/20/2021   18:25:31   (   0.14, -75.26) (   1.04, -71.27)  454.56                80
 08/22/2021   06:46:59   (  -0.15, -75.28) (   0.09, -76.46)  133.49                80
 08/23/2021   06:25:21   (  -0.15, -75.30) (  -0.91, -71.86)  391.26                80
 08/24/2021   18:46:56   (   0.16, -75.32) (  -0.25, -77.07)  199.89                80
 08/25/2021   18:30:38   (   0.16, -75.34) (   0.81, -72.49)  325.54                80