Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/16/2019   22:14:07   (   0.34,-128.42) (  -0.34,-131.53)  353.23                80
 08/17/2019   21:57:51   (   0.33,-128.43) (   0.65,-126.95)  168.48                80
 08/19/2019   10:16:45   (  -0.34,-128.46) (   0.45,-132.17)  421.83                80
 08/20/2019   10:00:29   (  -0.34,-128.46) (  -0.54,-127.59)   99.43                80
 08/22/2019   22:03:14   (   0.35,-128.43) (   0.39,-128.26)   19.23                80
 08/25/2019   10:03:12   (  -0.36,-128.44) (  -0.28,-128.90)   51.74                80
 08/26/2019   09:46:56   (  -0.36,-128.43) (  -1.28,-124.32)  468.29                80
 08/27/2019   22:05:57   (   0.37,-128.38) (   0.12,-129.57)  134.78                80
 08/28/2019   21:49:41   (   0.37,-128.37) (   1.12,-124.99)  385.05                80