Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2019   22:44:26   (   0.03,-137.19) (  -0.40,-139.07)  213.89                80
 07/20/2019   22:28:11   (   0.03,-137.19) (   0.65,-134.50)  307.25                80
 07/22/2019   10:49:44   (  -0.03,-137.21) (   0.53,-139.71)  285.13                80
 07/23/2019   10:28:09   (  -0.03,-137.20) (  -0.52,-135.14)  235.58                80
 07/24/2019   22:49:49   (   0.03,-137.18) (  -0.70,-140.37)  364.33                80
 07/25/2019   22:33:34   (   0.03,-137.17) (   0.35,-135.81)  156.03                80
 07/27/2019   10:52:26   (  -0.04,-137.18) (   0.83,-141.01)  437.61                80
 07/28/2019   10:36:12   (  -0.04,-137.16) (  -0.22,-136.45)   82.01                80
 07/30/2019   22:38:57   (   0.05,-137.11) (   0.05,-137.11)    1.06                80