Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 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)
 05/12/2021   18:20:09   (   0.03, -75.23) (   0.90, -71.31)  446.10                80
 05/14/2021   06:44:17   (  -0.02, -75.25) (   0.24, -76.49)  141.59                80
 05/15/2021   06:22:39   (  -0.02, -75.27) (  -0.79, -71.91)  383.52                80
 05/16/2021   18:46:56   (   0.02, -75.31) (  -0.36, -77.12)  206.17                80
 05/17/2021   18:25:18   (   0.02, -75.33) (   0.67, -72.53)  319.26                80
 05/19/2021   06:49:26   (  -0.01, -75.36) (   0.52, -77.70)  267.56                80
 05/20/2021   06:27:48   (  -0.01, -75.38) (  -0.51, -73.12)  258.17                80
 05/21/2021   18:52:04   (   0.01, -75.43) (  -0.65, -78.33)  330.60                80
 05/22/2021   18:30:27   (   0.01, -75.46) (   0.39, -73.74)  195.48                80
 05/24/2021   06:54:35   (  -0.01, -75.50) (   0.74, -78.93)  390.40                80
 05/25/2021   06:32:58   (  -0.01, -75.52) (  -0.30, -74.34)  135.81                80