Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/13/2020   22:38:48   (   0.00,-137.21) (  -0.08,-137.64)   48.38                80
 03/14/2020   22:22:33   (   0.00,-137.21) (   0.96,-133.06)  473.66                80
 03/16/2020   10:44:03   (  -0.00,-137.22) (   0.22,-138.26)  117.93                80
 03/17/2020   10:22:28   (  -0.00,-137.22) (  -0.82,-133.68)  403.48                80
 03/18/2020   22:44:06   (   0.00,-137.20) (  -0.40,-138.90)  194.19                80
 03/19/2020   22:27:51   (   0.00,-137.20) (   0.64,-134.33)  327.24                80
 03/21/2020   10:49:22   (  -0.00,-137.21) (   0.50,-139.53)  264.79                80
 03/22/2020   10:27:45   (  -0.00,-137.20) (  -0.49,-134.95)  256.26                80
 03/23/2020   22:49:25   (   0.00,-137.18) (  -0.66,-140.18)  342.22                80
 03/24/2020   22:33:09   (   0.00,-137.17) (   0.38,-135.61)  178.84                80