Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2020   10:37:43   (   0.03,-137.14) (  -0.04,-136.97)   19.45                80
 08/13/2020   22:40:23   (  -0.01,-137.10) (  -0.15,-137.61)   58.81                80
 08/14/2020   22:24:08   (   0.02,-137.08) (   0.92,-133.04)  460.51                80
 08/16/2020   10:45:38   (  -0.01,-137.04) (   0.24,-138.23)  135.27                80
 08/17/2020   10:24:02   (  -0.01,-137.02) (  -0.77,-133.65)  384.20                80
 08/18/2020   22:45:39   (   0.00,-136.98) (  -0.42,-138.87)  215.28                80
 08/19/2020   22:29:23   (   0.00,-136.95) (   0.59,-134.29)  303.89                80
 08/21/2020   10:50:53   (  -0.00,-136.91) (   0.57,-139.48)  292.95                80
 08/22/2020   10:29:16   (   0.00,-136.88) (  -0.44,-134.90)  225.83                80