Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/07/2021   10:25:57   (  -0.04,-137.21) (  -0.91,-133.37)  438.14                80
 02/08/2021   22:47:34   (   0.03,-137.20) (  -0.28,-138.58)  157.21                80
 02/09/2021   22:31:17   (   0.03,-137.19) (   0.73,-133.99)  364.37                80
 02/11/2021   10:52:45   (  -0.01,-137.16) (   0.41,-139.17)  228.72                80
 02/12/2021   10:31:08   (  -0.01,-137.15) (  -0.59,-134.58)  292.59                80
 02/13/2021   22:52:45   (   0.01,-137.14) (  -0.59,-139.80)  303.36                80
 02/14/2021   22:36:28   (   0.01,-137.12) (   0.42,-135.21)  217.81                80
 02/16/2021   10:57:56   (  -0.01,-137.09) (   0.72,-140.39)  376.01                80
 02/17/2021   10:36:18   (  -0.01,-137.08) (  -0.29,-135.80)  144.76                80
 02/18/2021   22:57:56   (   0.00,-137.05) (  -0.90,-141.02)  452.23                80
 02/19/2021   22:41:38   (   0.00,-137.03) (   0.11,-136.43)   68.31                80