Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/16/2020   10:45:37   (   0.03,-137.19) (   0.29,-138.22)  117.94                80
 08/17/2020   10:24:02   (   0.03,-137.19) (  -0.79,-133.65)  403.99                80
 08/18/2020   22:45:39   (  -0.02,-137.19) (  -0.42,-138.87)  191.61                80
 08/19/2020   22:29:24   (  -0.01,-137.19) (   0.66,-134.30)  329.86                80
 08/21/2020   10:48:14   (   0.01,-137.17) (   0.50,-139.49)  263.51                80
 08/22/2020   10:31:57   (   0.01,-137.17) (  -0.52,-134.91)  257.97                80
 08/23/2020   22:50:55   (  -0.01,-137.16) (  -0.68,-140.13)  338.37                80
 08/24/2020   22:34:38   (  -0.01,-137.15) (   0.34,-135.55)  182.59                80
 08/26/2020   10:53:29   (   0.00,-137.13) (   0.82,-140.74)  412.17                80
 08/27/2020   10:37:12   (  -0.00,-137.11) (  -0.20,-136.16)  108.13                80
 08/28/2020   22:56:10   (   0.01,-137.09) (  -0.94,-141.39)  489.62                80
 08/29/2020   22:39:54   (   0.00,-137.07) (   0.08,-136.81)   30.71                80