Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 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)
 06/15/2019   10:49:52   (  -0.01,-137.22) (   0.56,-139.70)  282.94                80
 06/16/2019   10:28:18   (  -0.01,-137.21) (  -0.48,-135.13)  237.50                80
 06/17/2019   22:49:59   (   0.01,-137.18) (  -0.68,-140.38)  364.07                80
 06/18/2019   22:33:44   (   0.01,-137.17) (   0.31,-135.80)  156.42                80
 06/20/2019   10:55:15   (  -0.01,-137.19) (   0.88,-141.00)  435.17                80
 06/21/2019   10:33:41   (   0.00,-137.18) (  -0.17,-136.43)   84.85                80
 06/23/2019   22:39:06   (  -0.01,-137.12) (   0.01,-137.10)    2.42                80
 06/26/2019   10:41:43   (   0.01,-137.12) (   0.14,-137.74)   70.43                80
 06/27/2019   10:20:08   (   0.01,-137.10) (  -0.85,-133.16)  448.83                80
 06/28/2019   22:41:49   (  -0.00,-137.04) (  -0.29,-138.41)  155.40                80