Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/20/2019   10:00:29   (  -0.34,-128.46) (  -0.55,-127.59)   99.29                80
 08/22/2019   22:03:14   (   0.35,-128.43) (   0.38,-128.26)   19.95                80
 08/25/2019   10:03:12   (  -0.36,-128.44) (  -0.27,-128.90)   51.84                80
 08/26/2019   09:46:57   (  -0.36,-128.43) (  -1.27,-124.32)  468.18                80
 08/27/2019   22:05:57   (   0.37,-128.39) (   0.11,-129.57)  134.06                80
 08/28/2019   21:49:41   (   0.37,-128.38) (   1.10,-124.99)  385.77                80
 08/30/2019   10:08:35   (  -0.38,-128.39) (  -0.00,-130.21)  207.32                80
 08/31/2019   09:52:19   (  -0.38,-128.37) (  -1.00,-125.63)  312.24                80
 09/01/2019   22:11:19   (   0.38,-128.32) (  -0.17,-130.87)  290.79                80