Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/23/2020   22:50:55   (  -0.04,-137.17) (  -0.68,-140.12)  336.23                80
 08/24/2020   22:34:38   (  -0.04,-137.16) (   0.34,-135.54)  184.93                80
 08/26/2020   10:56:09   (   0.04,-137.15) (   0.82,-140.74)  408.89                80
 08/27/2020   10:34:32   (   0.03,-137.13) (  -0.19,-136.15)  111.71                80
 08/28/2020   22:56:11   (  -0.03,-137.11) (  -0.95,-141.38)  486.28                80
 08/29/2020   22:39:54   (  -0.01,-137.10) (   0.06,-136.80)   33.89                80
 09/01/2020   10:39:48   (  -0.00,-137.06) (   0.08,-137.41)   40.77                80
 09/02/2020   10:23:31   (  -0.00,-137.04) (  -0.93,-132.83)  479.50                80
 09/03/2020   22:42:30   (   0.00,-137.01) (  -0.21,-138.06)  118.91                80
 09/04/2020   22:26:13   (   0.00,-136.99) (   0.80,-133.48)  401.19                80