Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2019   21:51:19   (  -0.03,-128.33) (   0.63,-125.34)  339.97                80
 12/03/2019   10:10:11   (   0.01,-128.33) (   0.50,-130.55)  253.03                80
 12/04/2019   09:53:56   (   0.02,-128.31) (  -0.52,-125.98)  266.41                80
 12/05/2019   22:12:55   (   0.00,-128.24) (  -0.64,-131.21)  338.10                80
 12/06/2019   21:56:39   (  -0.01,-128.22) (   0.32,-126.62)  181.22                80
 12/08/2019   10:15:31   (  -0.01,-128.22) (   0.81,-131.84)  412.35                80
 12/09/2019   09:59:16   (   0.00,-128.20) (  -0.21,-127.26)  106.60                80
 12/10/2019   22:18:15   (   0.02,-128.12) (  -0.95,-132.50)  498.82                80
 12/11/2019   22:01:58   (   0.00,-128.09) (   0.01,-127.91)   19.89                80
 12/14/2019   10:01:55   (  -0.01,-128.04) (   0.10,-128.54)   57.36                80