Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/24/2019   22:49:48   (   0.03,-137.20) (  -0.70,-140.37)  362.08                80
 07/25/2019   22:33:34   (   0.03,-137.20) (   0.35,-135.81)  158.76                80
 07/27/2019   10:55:06   (  -0.03,-137.20) (   0.82,-141.01)  435.00                80
 07/28/2019   10:36:12   (  -0.03,-137.19) (  -0.23,-136.45)   85.15                80
 07/30/2019   22:38:57   (   0.04,-137.15) (   0.06,-137.11)    4.90                80
 08/02/2019   10:38:54   (  -0.05,-137.12) (   0.07,-137.75)   71.52                80
 08/03/2019   10:22:39   (  -0.04,-137.10) (  -0.92,-133.18)  447.73                80
 08/04/2019   22:41:38   (   0.05,-137.07) (  -0.28,-138.41)  153.62                80
 08/05/2019   22:25:24   (   0.05,-137.05) (   0.77,-133.84)  365.50                80