Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/03/2021   22:42:23   (   0.04,-137.25) (   0.01,-137.36)   12.77                80
 02/06/2021   10:47:34   (  -0.03,-137.24) (   0.14,-137.95)   81.47                80
 02/07/2021   10:25:57   (  -0.03,-137.23) (  -0.87,-133.36)  440.70                80
 02/08/2021   22:47:34   (  -0.01,-137.23) (  -0.32,-138.57)  153.84                80
 02/09/2021   22:31:16   (  -0.01,-137.22) (   0.69,-133.98)  368.18                80
 02/11/2021   10:52:45   (   0.01,-137.20) (   0.46,-139.17)  224.08                80
 02/12/2021   10:31:08   (   0.01,-137.19) (  -0.61,-134.59)  297.58                80
 02/13/2021   22:52:46   (  -0.01,-137.18) (  -0.58,-139.81)  298.37                80
 02/14/2021   22:36:28   (  -0.00,-137.18) (   0.43,-135.22)  223.29                80
 02/16/2021   10:57:56   (   0.00,-137.16) (   0.72,-140.40)  369.21                80