Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/23/2021   06:34:09   (  -0.03, -75.17) (  -0.63, -72.39)  317.03                80
 12/24/2021   18:54:00   (   0.03, -75.18) (  -0.56, -77.83)  301.82                80
 12/25/2021   18:38:18   (   0.03, -75.18) (   0.45, -73.38)  205.32                80
 12/27/2021   07:00:39   (  -0.04, -75.18) (   0.76, -78.77)  409.26                80
 12/28/2021   06:39:36   (  -0.03, -75.18) (  -0.24, -74.33)   98.05                80
 12/30/2021   18:43:44   (   0.02, -75.19) (   0.02, -75.31)   12.62                80
 12/31/2021   18:28:02   (   0.02, -75.20) (   1.02, -70.86)  495.16                80
 01/02/2022   06:50:23   (  -0.01, -75.20) (   0.19, -76.25)  118.83                80
 01/03/2022   06:29:20   (  -0.00, -75.21) (  -0.75, -71.79)  388.84                80
 01/04/2022   18:51:50   (   0.00, -75.22) (  -0.46, -77.22)  228.53                80
 01/05/2022   18:36:07   (   0.00, -75.23) (   0.55, -72.78)  279.72                80