Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/31/2019   09:49:27   (   0.37,-128.37) (  -0.30,-125.47)  331.60                80
 09/01/2019   22:11:06   (  -0.37,-128.34) (  -0.93,-130.70)  268.87                80
 09/02/2019   21:54:51   (  -0.37,-128.34) (   0.12,-126.13)  251.23                80
 09/04/2019   10:16:24   (   0.37,-128.34) (   1.02,-131.34)  342.21                80
 09/05/2019   09:54:48   (   0.37,-128.32) (   0.02,-126.77)  177.14                80
 09/06/2019   22:16:29   (  -0.37,-128.28) (  -1.19,-132.01)  425.11                80
 09/07/2019   22:00:13   (  -0.36,-128.26) (  -0.19,-127.43)   94.34                80
 09/09/2019   10:21:45   (   0.35,-128.26) (   1.33,-132.64)  499.36                80
 09/10/2019   10:00:10   (   0.36,-128.24) (   0.33,-128.07)   19.60                80
 09/12/2019   22:02:56   (  -0.35,-128.17) (  -0.45,-128.74)   64.96                80
 09/13/2019   21:46:40   (  -0.35,-128.15) (   0.55,-124.16)  454.29                80