Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 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)
 12/12/2021   06:36:17   (  -0.01, -75.20) (  -0.49, -72.98)  252.41                80
 12/13/2021   18:56:08   (   0.02, -75.21) (  -0.71, -78.41)  365.08                80
 12/14/2021   18:40:26   (   0.01, -75.22) (   0.28, -73.97)  143.15                80
 12/16/2021   07:02:47   (  -0.01, -75.24) (   0.91, -79.36)  469.47                80
 12/17/2021   06:41:45   (  -0.01, -75.25) (  -0.08, -74.91)   38.83                80
 12/19/2021   18:45:53   (  -0.00, -75.29) (  -0.11, -75.90)   69.44                80
 12/20/2021   18:30:11   (  -0.01, -75.31) (   0.88, -71.46)  439.31                80
 12/22/2021   06:52:32   (   0.01, -75.33) (   0.32, -76.85)  172.47                80
 12/23/2021   06:31:30   (   0.01, -75.35) (  -0.68, -72.40)  336.38                80
 12/24/2021   18:54:00   (  -0.01, -75.38) (  -0.56, -77.83)  279.45                80
 12/25/2021   18:38:18   (  -0.01, -75.40) (   0.44, -73.38)  229.89                80