Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2021   18:40:26   (   0.02, -75.22) (   0.29, -73.97)  142.95                80
 12/16/2021   07:02:47   (  -0.02, -75.24) (   0.90, -79.36)  470.06                80
 12/17/2021   06:41:45   (  -0.01, -75.25) (  -0.09, -74.91)   38.08                80
 12/19/2021   18:45:53   (   0.00, -75.28) (  -0.16, -75.89)   70.54                80
 12/20/2021   18:30:10   (  -0.00, -75.29) (   0.83, -71.44)  438.09                80
 12/22/2021   06:52:31   (   0.00, -75.32) (   0.36, -76.84)  174.04                80
 12/23/2021   06:31:29   (   0.00, -75.33) (  -0.63, -72.39)  334.65                80
 12/24/2021   18:54:00   (  -0.00, -75.36) (  -0.55, -77.83)  281.41                80
 12/25/2021   18:38:18   (  -0.00, -75.38) (   0.45, -73.38)  227.78                80
 12/27/2021   07:00:39   (  -0.00, -75.42) (   0.76, -78.78)  383.03                80