Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/05/2021   10:32:55   (  -0.05,-137.21) (  -0.55,-134.90)  263.33                80
 03/06/2021   22:54:32   (   0.05,-137.21) (  -0.62,-140.12)  331.38                80
 03/07/2021   22:38:15   (   0.04,-137.21) (   0.40,-135.53)  190.75                80
 03/09/2021   10:59:43   (  -0.03,-137.19) (   0.74,-140.71)  401.43                80
 03/10/2021   10:38:06   (  -0.03,-137.18) (  -0.27,-136.12)  120.42                80
 03/11/2021   22:59:43   (   0.02,-137.17) (  -0.89,-141.34)  474.85                80
 03/12/2021   22:43:25   (   0.02,-137.16) (   0.12,-136.75)   46.98                80
 03/15/2021   10:45:56   (  -0.02,-137.13) (   0.01,-137.34)   24.21                80
 03/16/2021   10:24:19   (  -0.02,-137.11) (  -1.00,-132.75)  497.10                80
 03/17/2021   22:45:55   (   0.02,-137.10) (  -0.21,-137.96)   99.31                80
 03/18/2021   22:29:39   (   0.02,-137.08) (   0.87,-133.39)  421.70                80