Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2021   18:38:17   (   0.03, -75.18) (   0.44, -73.38)  205.67                80
 12/27/2021   07:00:39   (  -0.04, -75.18) (   0.76, -78.77)  408.94                80
 12/28/2021   06:39:36   (  -0.03, -75.19) (  -0.24, -74.32)   98.45                80
 12/30/2021   18:43:44   (   0.03, -75.20) (   0.01, -75.31)   11.63                80
 12/31/2021   18:28:02   (   0.02, -75.21) (   1.02, -70.86)  496.12                80
 01/02/2022   06:50:23   (  -0.01, -75.21) (   0.20, -76.25)  117.89                80
 01/03/2022   06:29:21   (  -0.00, -75.22) (  -0.80, -71.80)  389.86                80
 01/04/2022   18:51:50   (   0.00, -75.23) (  -0.46, -77.22)  227.17                80
 01/05/2022   18:36:07   (   0.00, -75.25) (   0.54, -72.78)  281.18                80
 01/07/2022   06:58:30   (  -0.01, -75.27) (   0.62, -78.18)  331.28                80