Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2020   10:11:59   (  -0.04,-128.26) (   0.57,-130.93)  304.24                80
 01/31/2020   09:55:44   (  -0.04,-128.24) (  -0.46,-126.36)  215.02                80
 02/01/2020   22:17:23   (   0.04,-128.21) (  -0.75,-131.58)  384.87                80
 02/02/2020   21:55:48   (   0.03,-128.18) (   0.29,-127.01)  133.86                80
 02/04/2020   10:17:18   (  -0.03,-128.13) (   0.88,-132.20)  464.06                80
 02/05/2020   10:01:02   (  -0.03,-128.10) (  -0.15,-127.63)   54.38                80
 02/07/2020   22:03:45   (  -0.01,-128.03) (  -0.08,-128.27)   28.06                80
 02/08/2020   21:42:10   (  -0.01,-127.99) (   0.95,-123.69)  489.47                80
 02/10/2020   10:03:40   (   0.01,-127.92) (   0.22,-128.89)  110.13                80
 02/11/2020   09:47:25   (   0.01,-127.89) (  -0.82,-124.32)  407.38                80