Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/12/2019   10:52:18   (  -0.05,-137.19) (   0.68,-140.35)  360.53                80
 08/13/2019   10:30:44   (  -0.05,-137.18) (  -0.38,-135.79)  159.64                80
 08/14/2019   22:52:23   (   0.05,-137.16) (  -0.83,-141.02)  440.27                80
 08/15/2019   22:36:09   (   0.05,-137.15) (   0.23,-136.45)   79.81                80
 08/18/2019   10:36:06   (  -0.06,-137.13) (  -0.06,-137.08)    5.51                80
 08/20/2019   22:38:50   (   0.06,-137.09) (  -0.09,-137.75)   75.84                80
 08/21/2019   22:22:35   (   0.06,-137.07) (   0.91,-133.17)  443.45                80
 08/23/2019   10:41:27   (  -0.06,-137.05) (   0.26,-138.38)  152.17                80
 08/24/2019   10:25:13   (  -0.06,-137.03) (  -0.80,-133.82)  366.48                80
 08/25/2019   22:44:12   (   0.07,-136.98) (  -0.40,-139.05)  236.34                80