Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/09/2019   21:54:33   (  -0.26,-127.85) (   0.14,-126.08)  201.93                80
 10/11/2019   10:13:26   (   0.23,-127.97) (   0.95,-131.30)  378.50                80
 10/12/2019   09:57:10   (   0.24,-128.01) (  -0.06,-126.72)  146.62                80
 10/13/2019   22:16:10   (  -0.22,-127.99) (  -1.13,-131.96)  453.12                80
 10/14/2019   21:59:55   (  -0.23,-128.02) (  -0.12,-127.39)   71.93                80
 10/17/2019   10:02:32   (   0.22,-128.16) (   0.20,-128.03)   15.18                80
 10/19/2019   22:02:38   (  -0.21,-128.15) (  -0.31,-128.71)   62.23                80
 10/20/2019   21:46:22   (  -0.22,-128.18) (   0.70,-124.13)  461.60                80
 10/22/2019   10:05:13   (   0.19,-128.27) (   0.45,-129.33)  121.36                80