Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/23/2019   22:30:10   (  -0.00,-137.21) (   0.49,-135.04)  246.94                80
 10/25/2019   10:51:41   (   0.00,-137.20) (   0.67,-140.25)  346.47                80
 10/26/2019   10:30:06   (   0.00,-137.20) (  -0.34,-135.67)  174.59                80
 10/27/2019   22:51:46   (  -0.00,-137.20) (  -0.83,-140.91)  422.89                80
 10/28/2019   22:35:31   (  -0.00,-137.20) (   0.19,-136.34)   97.89                80
 10/30/2019   10:57:02   (   0.00,-137.18) (   0.98,-141.54)  496.48                80
 10/31/2019   10:35:26   (   0.00,-137.17) (  -0.03,-136.96)   23.81                80
 11/02/2019   22:38:11   (   0.00,-137.15) (  -0.11,-137.63)   54.92                80
 11/03/2019   22:21:56   (   0.00,-137.14) (   0.91,-133.05)  465.02                80
 11/05/2019   10:43:27   (   0.00,-137.11) (   0.27,-138.26)  130.41                80