Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2019   10:19:42   (   0.06,-128.05) (   0.93,-132.03)  452.56                80
 05/01/2019   09:58:07   (   0.07,-128.08) (  -0.05,-127.45)   71.32                80
 05/03/2019   22:00:53   (  -0.06,-128.15) (  -0.07,-128.13)    2.67                80
 05/06/2019   10:03:31   (   0.06,-128.20) (   0.21,-128.77)   65.86                80
 05/07/2019   09:44:37   (   0.06,-128.22) (  -0.83,-124.21)  456.99                80
 05/08/2019   22:06:18   (  -0.05,-128.25) (  -0.33,-129.45)  137.93                80
 05/09/2019   21:50:04   (  -0.06,-128.26) (   0.70,-124.89)  384.65                80
 05/11/2019   10:08:56   (   0.05,-128.28) (   0.46,-130.10)  207.60                80
 05/12/2019   09:52:41   (   0.06,-128.29) (  -0.58,-125.53)  314.57                80
 05/13/2019   22:11:43   (  -0.05,-128.30) (  -0.58,-130.78)  281.58                80