Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2019   22:38:56   (   0.04,-137.19) (   0.03,-137.10)    9.55                80
 08/02/2019   10:38:54   (  -0.05,-137.17) (   0.09,-137.75)   65.57                80
 08/03/2019   10:22:39   (  -0.04,-137.16) (  -0.96,-133.18)  454.41                80
 08/04/2019   22:41:39   (   0.05,-137.14) (  -0.25,-138.41)  144.91                80
 08/05/2019   22:25:24   (   0.05,-137.13) (   0.80,-133.85)  374.94                80
 08/07/2019   10:44:16   (  -0.05,-137.12) (   0.38,-139.05)  220.71                80
 08/08/2019   10:28:01   (  -0.05,-137.10) (  -0.61,-134.48)  298.70                80
 08/09/2019   22:47:01   (   0.06,-137.07) (  -0.53,-139.72)  301.80                80
 08/10/2019   22:30:46   (   0.06,-137.05) (   0.46,-135.14)  217.26                80