Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2019   22:01:59   (   0.01,-128.09) (   0.04,-127.91)   19.89                80
 12/14/2019   10:01:55   (  -0.01,-128.03) (   0.12,-128.53)   57.60                80
 12/15/2019   09:45:39   (   0.00,-128.00) (  -0.90,-123.96)  460.19                80
 12/16/2019   22:04:38   (   0.02,-127.91) (  -0.26,-129.20)  146.21                80
 12/17/2019   21:48:23   (   0.01,-127.87) (   0.77,-124.62)  371.38                80
 12/19/2019   10:07:14   (  -0.03,-127.85) (   0.41,-129.82)  225.04                80
 12/20/2019   09:50:59   (  -0.02,-127.81) (  -0.61,-125.24)  292.35                80
 12/21/2019   22:09:57   (   0.03,-127.71) (  -0.60,-130.47)  314.63                80
 12/22/2019   21:53:42   (   0.02,-127.67) (   0.43,-125.89)  202.58                80
 12/24/2019   10:12:33   (  -0.04,-127.64) (   0.75,-131.09)  394.36                80