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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2019   10:44:21   (  -0.03,-137.21) (   0.25,-138.40)  136.07                80
 07/18/2019   10:22:46   (  -0.03,-137.20) (  -0.80,-133.83)  384.58                80
 07/19/2019   22:44:26   (   0.03,-137.18) (  -0.42,-139.06)  215.26                80
 07/20/2019   22:28:11   (   0.03,-137.18) (   0.63,-134.50)  305.39                80
 07/22/2019   10:49:43   (  -0.03,-137.19) (   0.54,-139.71)  287.43                80
 07/23/2019   10:28:09   (  -0.03,-137.18) (  -0.51,-135.14)  232.78                80
 07/24/2019   22:49:48   (   0.04,-137.14) (  -0.71,-140.37)  368.23                80
 07/25/2019   22:33:34   (   0.03,-137.13) (   0.35,-135.81)  151.66                80
 07/27/2019   10:52:26   (  -0.04,-137.13) (   0.83,-141.01)  442.41                80
 07/28/2019   10:36:12   (  -0.04,-137.12) (  -0.22,-136.45)   76.76                80
 07/30/2019   22:36:15   (   0.05,-137.04) (   0.01,-137.10)    8.18                80