Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2021   07:02:47   (  -0.02, -75.24) (   0.93, -79.36)  470.01                80
 12/17/2021   06:41:44   (  -0.01, -75.25) (  -0.07, -74.91)   38.23                80
 12/19/2021   18:45:53   (   0.00, -75.28) (  -0.13, -75.90)   70.38                80
 12/20/2021   18:30:11   (  -0.00, -75.30) (   0.86, -71.45)  438.18                80
 12/22/2021   06:52:32   (  -0.00, -75.32) (   0.34, -76.85)  173.89                80
 12/23/2021   06:31:30   (   0.00, -75.34) (  -0.66, -72.40)  334.77                80
 12/24/2021   18:54:01   (  -0.00, -75.36) (  -0.53, -77.84)  281.31                80
 12/25/2021   18:38:18   (  -0.00, -75.38) (   0.47, -73.39)  227.93                80
 12/27/2021   07:00:40   (  -0.00, -75.42) (   0.74, -78.78)  382.85                80
 12/28/2021   06:39:37   (   0.00, -75.44) (  -0.26, -74.34)  126.47                80