Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2021   06:42:17   (  -0.04, -75.19) (  -0.26, -74.33)   98.63                80
 12/30/2021   18:43:44   (   0.03, -75.21) (   0.04, -75.31)   11.30                80
 12/31/2021   18:28:01   (   0.03, -75.22) (   0.99, -70.85)  497.03                80
 01/02/2022   06:50:22   (  -0.02, -75.22) (   0.22, -76.24)  117.11                80
 01/03/2022   06:29:20   (  -0.02, -75.23) (  -0.78, -71.80)  390.76                80
 01/04/2022   18:51:50   (   0.02, -75.25) (  -0.42, -77.23)  225.75                80
 01/05/2022   18:36:08   (   0.02, -75.26) (   0.59, -72.78)  282.73                80
 01/07/2022   06:58:29   (  -0.02, -75.28) (   0.63, -78.17)  329.83                80
 01/08/2022   06:37:27   (  -0.02, -75.30) (  -0.38, -73.73)  179.08                80
 01/09/2022   18:59:56   (   0.02, -75.33) (  -0.87, -79.15)  435.79                80
 01/10/2022   18:44:13   (   0.02, -75.36) (   0.14, -74.70)   73.85                80