Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 14.  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   10:45:57   (  -0.04,-137.20) (  -0.03,-137.35)   16.60                80
 03/17/2021   22:45:55   (   0.04,-137.19) (  -0.16,-137.97)   89.54                80
 03/18/2021   22:29:39   (   0.04,-137.18) (   0.92,-133.39)  432.27                80
 03/20/2021   10:51:06   (  -0.04,-137.15) (   0.29,-138.56)  160.61                80
 03/21/2021   10:29:29   (  -0.04,-137.14) (  -0.73,-133.97)  360.57                80
 03/22/2021   22:51:06   (   0.03,-137.12) (  -0.41,-139.19)  236.04                80
 03/23/2021   22:34:49   (   0.03,-137.10) (   0.62,-134.60)  284.87                80
 03/25/2021   10:56:16   (  -0.02,-137.06) (   0.60,-139.77)  309.20                80
 03/26/2021   10:34:38   (  -0.02,-137.04) (  -0.42,-135.18)  211.22                80
 03/27/2021   22:56:15   (   0.01,-137.01) (  -0.76,-140.39)  386.50                80