Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/03/2019   22:00:53   (  -0.06,-128.15) (  -0.08,-128.13)    3.16                80
 05/06/2019   10:03:31   (   0.06,-128.20) (   0.21,-128.77)   65.52                80
 05/07/2019   09:44:37   (   0.06,-128.22) (  -0.83,-124.21)  457.39                80
 05/08/2019   22:06:18   (  -0.05,-128.25) (  -0.33,-129.45)  137.42                80
 05/09/2019   21:50:04   (  -0.06,-128.27) (   0.71,-124.89)  385.21                80
 05/11/2019   10:08:56   (   0.05,-128.28) (   0.45,-130.10)  206.98                80
 05/12/2019   09:52:41   (   0.06,-128.29) (  -0.59,-125.53)  315.26                80
 05/13/2019   22:11:42   (  -0.05,-128.31) (  -0.62,-130.77)  280.77                80
 05/14/2019   21:55:27   (  -0.05,-128.32) (   0.41,-126.20)  241.52                80