Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 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)
 08/20/2019   22:38:51   (   0.03,-137.20) (  -0.07,-137.76)   63.15                80
 08/21/2019   22:22:36   (   0.04,-137.20) (   0.92,-133.18)  458.47                80
 08/23/2019   10:44:08   (  -0.04,-137.21) (   0.24,-138.39)  134.34                80
 08/24/2019   10:22:33   (  -0.04,-137.21) (  -0.81,-133.82)  386.61                80
 08/25/2019   22:44:14   (   0.05,-137.20) (  -0.35,-139.06)  211.86                80
 08/26/2019   22:27:58   (   0.05,-137.20) (   0.64,-134.49)  308.54                80
 08/28/2019   10:49:31   (  -0.05,-137.19) (   0.52,-139.70)  285.83                80
 08/29/2019   10:27:56   (  -0.06,-137.18) (  -0.54,-135.13)  234.19                80
 08/30/2019   22:49:35   (   0.06,-137.16) (  -0.69,-140.36)  365.52                80
 08/31/2019   22:33:21   (   0.06,-137.15) (   0.37,-135.79)  154.37                80
 09/02/2019   10:54:53   (  -0.06,-137.13) (   0.79,-141.00)  440.54                80