Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/04/2019   22:41:39   (   0.04,-137.20) (  -0.25,-138.41)  138.37                80
 08/05/2019   22:25:24   (   0.04,-137.20) (   0.80,-133.84)  382.49                80
 08/07/2019   10:44:16   (  -0.04,-137.20) (   0.38,-139.05)  211.24                80
 08/08/2019   10:28:02   (  -0.04,-137.19) (  -0.67,-134.49)  309.19                80
 08/09/2019   22:47:01   (   0.05,-137.17) (  -0.54,-139.72)  290.18                80
 08/10/2019   22:30:47   (   0.05,-137.17) (   0.51,-135.15)  229.88                80
 08/12/2019   10:49:39   (  -0.06,-137.16) (   0.67,-140.36)  364.96                80
 08/13/2019   10:33:25   (  -0.06,-137.15) (  -0.38,-135.79)  154.78                80
 08/14/2019   22:52:24   (   0.06,-137.12) (  -0.83,-141.02)  445.58                80
 08/15/2019   22:36:09   (   0.06,-137.10) (   0.22,-136.46)   74.02                80
 08/18/2019   10:36:06   (  -0.07,-137.07) (  -0.04,-137.09)    3.70                80