Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/15/2019   10:54:09   (  -0.00,-137.22) (   0.82,-140.84)  412.69                80
 11/16/2019   10:32:33   (   0.00,-137.21) (  -0.20,-136.26)  108.28                80
 11/17/2019   22:54:13   (  -0.00,-137.20) (  -0.99,-141.49)  489.55                80
 11/18/2019   22:37:57   (  -0.01,-137.20) (   0.03,-136.92)   31.26                80
 11/21/2019   10:40:34   (   0.01,-137.17) (   0.08,-137.55)   42.95                80
 11/22/2019   10:18:58   (   0.01,-137.16) (  -0.94,-132.98)  477.22                80
 11/23/2019   22:40:38   (  -0.01,-137.14) (  -0.24,-138.21)  121.65                80
 11/24/2019   22:24:22   (  -0.01,-137.13) (   0.78,-133.64)  398.37                80
 11/26/2019   10:45:54   (   0.02,-137.11) (   0.41,-138.84)  196.92                80
 11/27/2019   10:24:18   (   0.02,-137.09) (  -0.61,-134.26)  322.60                80
 11/28/2019   22:45:57   (  -0.03,-137.06) (  -0.55,-139.50)  277.47                80