Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2019   22:03:14   (   0.35,-128.43) (   0.36,-128.25)   19.61                80
 08/25/2019   10:03:11   (  -0.36,-128.44) (  -0.26,-128.90)   51.53                80
 08/26/2019   09:46:56   (  -0.36,-128.43) (  -1.25,-124.32)  468.45                80
 08/27/2019   22:05:56   (   0.37,-128.38) (   0.09,-129.56)  134.72                80
 08/28/2019   21:49:42   (   0.37,-128.37) (   1.15,-125.00)  385.10                80
 08/30/2019   10:08:34   (  -0.38,-128.39) (   0.00,-130.21)  207.10                80
 08/31/2019   09:52:19   (  -0.38,-128.37) (  -0.99,-125.63)  312.44                80
 09/01/2019   22:11:19   (   0.38,-128.31) (  -0.17,-130.87)  291.47                80
 09/02/2019   21:55:04   (   0.38,-128.30) (   0.83,-126.29)  228.05                80