Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 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)
 12/08/2022   10:56:55   (   0.01,-137.33) (  -0.40,-135.47)  211.94                80
 12/09/2022   23:19:30   (  -0.01,-137.33) (  -0.85,-140.91)  409.05                80
 12/10/2022   23:03:51   (  -0.02,-137.33) (   0.19,-136.48)   96.74                80
 12/13/2022   11:07:58   (   0.02,-137.33) (   0.05,-137.44)   13.37                80
 12/14/2022   10:46:59   (   0.03,-137.32) (  -0.93,-133.00)  491.92                80
 12/15/2022   23:09:35   (  -0.03,-137.31) (  -0.26,-138.45)  130.20                80
 12/16/2022   22:53:56   (  -0.03,-137.30) (   0.72,-134.01)  374.95                80
 12/18/2022   11:16:22   (   0.03,-137.30) (   0.49,-139.42)  241.53                80
 12/19/2022   10:55:22   (   0.03,-137.28) (  -0.50,-134.98)  263.07                80
 12/20/2022   23:17:58   (  -0.04,-137.25) (  -0.74,-140.42)  360.55                80
 12/21/2022   23:02:18   (  -0.04,-137.24) (   0.24,-135.98)  143.46                80