Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2021   06:22:39   (  -0.03, -75.23) (  -0.76, -71.89)  379.79                80
 05/16/2021   18:46:55   (   0.02, -75.26) (  -0.40, -77.11)  211.25                80
 05/17/2021   18:25:18   (   0.02, -75.27) (   0.65, -72.52)  313.31                80
 05/19/2021   06:49:25   (  -0.02, -75.28) (   0.51, -77.70)  274.73                80
 05/20/2021   06:27:46   (  -0.01, -75.30) (  -0.48, -73.10)  250.24                80
 05/21/2021   18:52:03   (   0.01, -75.33) (  -0.65, -78.32)  339.74                80
 05/22/2021   18:30:24   (   0.01, -75.35) (   0.35, -73.72)  185.62                80
 05/24/2021   06:54:31   (  -0.01, -75.38) (   0.78, -78.90)  401.28                80
 05/25/2021   06:32:53   (  -0.01, -75.40) (  -0.24, -74.30)  124.22                80
 05/26/2021   18:57:08   (   0.01, -75.44) (  -0.94, -79.51)  465.25                80
 05/27/2021   18:35:31   (   0.01, -75.46) (   0.14, -74.93)   60.49                80