Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2021   06:44:24   (  -0.02, -75.21) (  -0.08, -74.91)   33.49                80
 12/19/2021   18:45:53   (   0.01, -75.19) (  -0.12, -75.90)   80.21                80
 12/20/2021   18:30:11   (   0.01, -75.19) (   0.88, -71.45)  426.48                80
 12/22/2021   06:52:31   (  -0.01, -75.19) (   0.38, -76.83)  188.40                80
 12/23/2021   06:31:29   (  -0.00, -75.18) (  -0.62, -72.39)  318.39                80
 12/24/2021   18:54:00   (   0.01, -75.18) (  -0.56, -77.83)  300.84                80
 12/25/2021   18:38:17   (   0.01, -75.19) (   0.44, -73.38)  206.46                80
 12/27/2021   07:00:39   (  -0.01, -75.20) (   0.77, -78.77)  407.13                80
 12/28/2021   06:39:36   (  -0.01, -75.20) (  -0.23, -74.33)  100.37                80
 12/30/2021   18:43:43   (  -0.00, -75.21) (  -0.05, -75.30)   10.77                80