Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 1 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/04/2023   11:02:10   (   0.02,-137.34) (  -0.20,-136.44)  103.18                80
 01/06/2023   23:06:25   (  -0.02,-137.33) (  -0.06,-137.43)   12.13                80
 01/07/2023   22:50:45   (  -0.02,-137.33) (   0.95,-132.99)  493.61                80
 01/09/2023   11:13:11   (   0.01,-137.32) (   0.28,-138.39)  122.45                80
 01/10/2023   10:52:11   (   0.01,-137.32) (  -0.73,-133.95)  382.79                80
 01/11/2023   23:17:27   (  -0.00,-137.30) (  -0.46,-139.40)  238.97                80
 01/12/2023   22:56:27   (   0.00,-137.29) (   0.55,-134.96)  266.13                80
 01/14/2023   11:21:32   (  -0.00,-137.28) (   0.68,-140.36)  350.55                80
 01/15/2023   11:00:32   (  -0.00,-137.27) (  -0.28,-135.91)  154.14                80
 01/16/2023   23:25:46   (  -0.01,-137.24) (  -0.95,-141.35)  468.74                80
 01/17/2023   23:04:47   (  -0.01,-137.22) (   0.07,-136.91)   35.43                80
:07  ( -80.91,  46.05)    2.06                 8