Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/30/2021   06:49:56   (  -0.06, -75.14) (   0.61, -78.18)  346.03                80
 07/01/2021   06:33:39   (  -0.06, -75.14) (  -0.43, -73.59)  177.49                80
 07/02/2021   18:52:35   (   0.07, -75.15) (  -0.75, -78.80)  416.23                80
 07/03/2021   18:36:18   (   0.06, -75.16) (   0.30, -74.21)  107.82                80
 07/05/2021   06:55:04   (  -0.08, -75.17) (   0.90, -79.38)  480.50                80
 07/06/2021   06:36:06   (  -0.07, -75.18) (  -0.15, -74.79)   43.53                80
 07/08/2021   18:38:45   (   0.08, -75.20) (   0.02, -75.42)   25.58                80
 07/09/2021   18:22:28   (   0.08, -75.21) (   1.07, -70.83)  498.95                80
 07/11/2021   06:41:15   (  -0.09, -75.23) (   0.08, -76.01)   88.56                80
 07/12/2021   06:24:58   (  -0.09, -75.25) (  -0.97, -71.42)  436.03                80