Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/09/2021   22:51:41   (  -0.02,-137.20) (   0.02,-136.99)   23.61                80
 11/12/2021   10:51:29   (   0.01,-137.20) (   0.08,-137.57)   42.15                80
 11/13/2021   10:35:10   (   0.01,-137.19) (  -0.95,-132.98)  481.01                80
 11/14/2021   22:54:06   (  -0.01,-137.18) (  -0.22,-138.18)  113.74                80
 11/15/2021   22:37:47   (  -0.01,-137.17) (   0.81,-133.59)  409.32                80
 11/17/2021   10:56:32   (   0.01,-137.17) (   0.39,-138.74)  180.10                80
 11/18/2021   10:40:14   (   0.01,-137.16) (  -0.65,-134.15)  342.58                80
 11/19/2021   22:59:09   (  -0.01,-137.14) (  -0.51,-139.36)  253.18                80
 11/20/2021   22:42:51   (  -0.01,-137.12) (   0.53,-134.77)  268.97                80
 11/22/2021   11:01:37   (   0.00,-137.11) (   0.62,-139.94)  322.02                80