Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/08/2023   09:04:26   (   0.00,-104.68) (  -0.55,-102.20)  283.01                80
 12/09/2023   21:26:49   (  -0.00,-104.66) (  -0.65,-107.58)  333.59                80
 12/10/2023   21:11:02   (  -0.00,-104.66) (   0.33,-103.11)  176.59                80
 12/12/2023   09:33:16   (   0.00,-104.69) (   0.86,-108.45)  429.36                80
 12/13/2023   09:12:10   (   0.00,-104.69) (  -0.18,-103.99)   80.46                80
 12/15/2023   21:16:05   (  -0.01,-104.65) (  -0.09,-104.88)   27.42                80
 12/16/2023   21:00:18   (  -0.02,-104.65) (   0.96,-100.42)  482.57                80
 12/18/2023   09:22:31   (   0.01,-104.68) (   0.28,-105.76)  123.38                80
 12/19/2023   09:01:25   (   0.01,-104.68) (  -0.78,-101.29)  386.42                80
 12/20/2023   21:23:47   (  -0.01,-104.64) (  -0.48,-106.67)  230.85                80
 12/21/2023   21:08:00   (  -0.01,-104.65) (   0.52,-102.19)  279.38                80