Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/27/2021   18:47:27   (   0.05, -75.14) (  -0.51, -77.59)  279.34                80
 06/28/2021   18:31:09   (   0.05, -75.14) (   0.54, -73.00)  243.78                80
 06/30/2021   06:49:57   (  -0.06, -75.14) (   0.61, -78.18)  346.29                80
 07/01/2021   06:33:38   (  -0.05, -75.14) (  -0.38, -73.58)  177.20                80
 07/02/2021   18:52:35   (   0.06, -75.14) (  -0.78, -78.79)  416.18                80
 07/03/2021   18:36:17   (   0.06, -75.15) (   0.27, -74.21)  107.86                80
 07/05/2021   06:55:04   (  -0.07, -75.17) (   0.88, -79.38)  480.79                80
 07/06/2021   06:38:47   (  -0.07, -75.17) (  -0.17, -74.80)   43.22                80
 07/08/2021   18:38:45   (   0.08, -75.19) (   0.02, -75.41)   25.44                80
 07/09/2021   18:22:27   (   0.08, -75.20) (   1.08, -70.83)  499.08                80