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   (   0.06, -75.14) (  -0.49, -77.59)  279.30                80
 06/28/2021   18:31:10   (   0.05, -75.14) (   0.56, -73.00)  243.80                80
 06/30/2021   06:49:56   (  -0.06, -75.13) (   0.65, -78.17)  346.42                80
 07/01/2021   06:33:39   (  -0.05, -75.14) (  -0.40, -73.58)  177.03                80
 07/02/2021   18:52:35   (   0.06, -75.14) (  -0.76, -78.79)  416.27                80
 07/03/2021   18:36:17   (   0.06, -75.15) (   0.29, -74.21)  107.75                80
 07/05/2021   06:55:05   (  -0.07, -75.16) (   0.86, -79.39)  481.05                80
 07/06/2021   06:36:06   (  -0.07, -75.17) (  -0.13, -74.79)   43.02                80
 07/08/2021   18:38:45   (   0.08, -75.19) (   0.04, -75.42)   25.67                80
 07/09/2021   18:22:28   (   0.08, -75.20) (   1.09, -70.83)  498.80                80
 07/11/2021   06:41:15   (  -0.09, -75.22) (   0.07, -76.01)   89.24                80