Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2021   06:42:37   (  -0.02, -75.18) (   0.22, -76.23)  119.40                80
 04/24/2021   06:21:00   (  -0.03, -75.18) (  -0.81, -71.64)  403.51                80
 04/25/2021   18:42:36   (   0.02, -75.18) (  -0.34, -76.85)  190.82                80
 04/26/2021   18:26:19   (   0.03, -75.18) (   0.69, -72.27)  332.53                80
 04/28/2021   06:47:47   (  -0.02, -75.20) (   0.48, -77.44)  256.00                80
 04/29/2021   06:26:10   (  -0.02, -75.20) (  -0.55, -72.86)  267.24                80
 04/30/2021   18:47:45   (   0.02, -75.20) (  -0.65, -78.06)  326.96                80
 05/01/2021   18:31:28   (   0.02, -75.20) (   0.44, -73.48)  196.83                80
 05/03/2021   06:52:57   (  -0.01, -75.23) (   0.73, -78.66)  390.60                80
 05/04/2021   06:31:19   (  -0.01, -75.24) (  -0.30, -74.08)  133.51                80
 05/05/2021   18:52:55   (   0.01, -75.25) (  -0.90, -79.28)  459.52                80
 05/06/2021   18:36:37   (   0.01, -75.27) (   0.14, -74.69)   65.31                80