Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/06/2021   11:05:22   (   0.02,-137.21) (   0.89,-140.97)  428.88                80
 11/07/2021   10:49:04   (   0.02,-137.21) (  -0.14,-136.37)   94.23                80
 11/09/2021   22:51:41   (  -0.01,-137.18) (   0.06,-137.00)   21.95                80
 11/12/2021   10:51:28   (   0.01,-137.16) (   0.10,-137.56)   45.76                80
 11/13/2021   10:35:10   (   0.01,-137.15) (  -0.93,-132.97)  476.78                80
 11/14/2021   22:54:05   (  -0.01,-137.13) (  -0.24,-138.17)  118.68                80
 11/15/2021   22:37:47   (  -0.01,-137.12) (   0.80,-133.58)  403.77                80
 11/17/2021   10:56:32   (   0.01,-137.11) (   0.40,-138.74)  186.79                80
 11/18/2021   10:40:13   (   0.01,-137.09) (  -0.64,-134.15)  335.28                80
 11/19/2021   22:59:09   (  -0.01,-137.06) (  -0.52,-139.35)  261.22                80