Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2019   10:55:06   (  -0.03,-137.20) (   0.83,-141.01)  434.49                80
 07/28/2019   10:33:31   (  -0.03,-137.19) (  -0.22,-136.44)   85.84                80
 07/30/2019   22:38:56   (   0.03,-137.16) (   0.06,-137.11)    6.61                80
 08/02/2019   10:38:53   (  -0.04,-137.13) (   0.12,-137.74)   69.75                80
 08/03/2019   10:22:39   (  -0.04,-137.12) (  -0.93,-133.17)  449.71                80
 08/04/2019   22:41:38   (   0.04,-137.09) (  -0.28,-138.41)  150.59                80
 08/05/2019   22:25:24   (   0.04,-137.07) (   0.78,-133.84)  368.72                80
 08/07/2019   10:44:16   (  -0.05,-137.05) (   0.40,-139.05)  227.77                80
 08/08/2019   10:28:00   (  -0.05,-137.03) (  -0.59,-134.47)  291.09                80
 08/09/2019   22:47:01   (   0.05,-136.99) (  -0.54,-139.72)  310.41                80