Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/15/2021   10:45:56   (  -0.04,-137.20) (  -0.01,-137.34)   16.38                80
 03/17/2021   22:45:56   (   0.04,-137.19) (  -0.12,-137.97)   89.56                80
 03/18/2021   22:29:39   (   0.04,-137.18) (   0.90,-133.39)  432.17                80
 03/20/2021   10:51:07   (  -0.04,-137.15) (   0.25,-138.57)  160.62                80
 03/21/2021   10:29:29   (  -0.04,-137.14) (  -0.76,-133.98)  360.56                80
 03/22/2021   22:51:06   (   0.03,-137.12) (  -0.43,-139.19)  236.15                80
 03/23/2021   22:34:48   (   0.03,-137.10) (   0.59,-134.60)  284.71                80
 03/25/2021   10:56:16   (  -0.02,-137.06) (   0.57,-139.78)  309.26                80
 03/26/2021   10:34:39   (  -0.02,-137.04) (  -0.45,-135.19)  211.15                80
 03/27/2021   22:56:15   (   0.01,-137.01) (  -0.74,-140.40)  386.70                80
 03/28/2021   22:39:58   (   0.01,-136.98) (   0.29,-135.81)  133.41                80