Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 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)
 04/12/2021   06:51:16   (  -0.03, -75.21) (   0.68, -78.39)  362.85                80
 04/13/2021   06:29:39   (  -0.04, -75.21) (  -0.35, -73.80)  160.38                80
 04/14/2021   18:51:15   (   0.03, -75.22) (  -0.81, -79.02)  433.05                80
 04/15/2021   18:34:57   (   0.04, -75.22) (   0.21, -74.43)   90.62                80
 04/17/2021   06:56:26   (  -0.03, -75.24) (   0.96, -79.61)  497.81                80
 04/18/2021   06:34:48   (  -0.03, -75.25) (  -0.06, -75.02)   25.88                80
 04/20/2021   18:37:27   (   0.02, -75.27) (  -0.06, -75.65)   43.17                80
 04/21/2021   18:21:10   (   0.02, -75.28) (   0.97, -71.06)  481.09                80
 04/23/2021   06:42:38   (  -0.01, -75.31) (   0.22, -76.23)  106.28                80
 04/24/2021   06:21:02   (  -0.02, -75.32) (  -0.87, -71.66)  418.12                80
 04/25/2021   18:42:37   (   0.01, -75.34) (  -0.33, -76.86)  173.99                80