Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2021   06:44:17   (  -0.03, -75.22) (   0.25, -76.49)  144.67                80
 05/15/2021   06:22:39   (  -0.03, -75.23) (  -0.79, -71.90)  379.53                80
 05/16/2021   18:46:56   (   0.02, -75.25) (  -0.37, -77.12)  211.56                80
 05/17/2021   18:25:18   (   0.02, -75.27) (   0.67, -72.53)  313.00                80
 05/19/2021   06:49:25   (  -0.02, -75.28) (   0.52, -77.70)  275.15                80
 05/20/2021   06:27:48   (  -0.02, -75.30) (  -0.53, -73.11)  249.73                80
 05/21/2021   18:52:04   (   0.01, -75.33) (  -0.63, -78.33)  340.41                80
 05/22/2021   18:30:26   (   0.01, -75.35) (   0.35, -73.73)  184.84                80
 05/24/2021   06:54:34   (  -0.01, -75.38) (   0.76, -78.91)  402.31                80
 05/25/2021   06:32:56   (  -0.01, -75.40) (  -0.23, -74.32)  123.03                80
 05/26/2021   18:57:12   (   0.01, -75.44) (  -0.92, -79.53)  466.74                80
 05/27/2021   18:35:34   (   0.01, -75.46) (   0.12, -74.94)   58.75                80