Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/19/2021   18:41:48   (   0.13, -75.20) (  -0.01, -75.86)   74.77                80
 08/20/2021   18:25:31   (   0.13, -75.20) (   1.05, -71.27)  448.37                80
 08/22/2021   06:46:58   (  -0.14, -75.21) (   0.13, -76.44)  140.79                80
 08/23/2021   06:25:20   (  -0.14, -75.21) (  -0.87, -71.85)  382.89                80
 08/24/2021   18:46:55   (   0.15, -75.22) (  -0.29, -77.06)  210.36                80
 08/25/2021   18:30:37   (   0.14, -75.23) (   0.77, -72.47)  314.03                80
 08/27/2021   06:52:05   (  -0.15, -75.25) (   0.41, -77.64)  273.29                80
 08/28/2021   06:30:27   (  -0.15, -75.26) (  -0.65, -73.06)  251.21                80
 08/29/2021   18:52:03   (   0.16, -75.27) (  -0.50, -78.27)  341.30                80
 08/30/2021   18:35:44   (   0.16, -75.29) (   0.51, -73.67)  183.49                80