Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/31/2019   22:33:20   (   0.02,-137.20) (   0.37,-135.79)  161.56                80
 09/02/2019   10:54:52   (  -0.02,-137.19) (   0.84,-140.99)  432.43                80
 09/03/2019   10:33:17   (  -0.02,-137.19) (  -0.22,-136.42)   88.11                80
 09/05/2019   22:38:42   (   0.03,-137.17) (   0.05,-137.09)    9.43                80
 09/08/2019   10:41:19   (  -0.03,-137.14) (   0.09,-137.72)   65.90                80
 09/09/2019   10:19:43   (  -0.03,-137.13) (  -0.91,-133.14)  453.70                80
 09/10/2019   22:41:24   (   0.03,-137.10) (  -0.27,-138.38)  146.22                80
 09/11/2019   22:25:09   (   0.03,-137.09) (   0.79,-133.82)  373.24                80
 09/13/2019   10:46:41   (  -0.03,-137.07) (   0.40,-139.02)  222.57                80