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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/01/2023   23:00:44   (   0.01,-137.32) (   0.42,-135.48)  210.41                80
 01/03/2023   11:23:09   (  -0.01,-137.32) (   0.81,-140.87)  406.13                80
 01/04/2023   11:02:10   (  -0.01,-137.31) (  -0.19,-136.44)   98.70                80
 01/06/2023   23:06:26   (   0.01,-137.27) (  -0.01,-137.44)   19.44                80
 01/07/2023   22:50:46   (   0.01,-137.25) (   0.99,-133.00)  485.14                80
 01/09/2023   11:13:12   (  -0.00,-137.24) (   0.24,-138.40)  132.50                80
 01/10/2023   10:52:12   (  -0.00,-137.22) (  -0.77,-133.96)  371.78                80
 01/11/2023   23:14:46   (  -0.00,-137.19) (  -0.48,-139.40)  251.64                80
 01/12/2023   22:59:06   (  -0.00,-137.17) (   0.48,-134.95)  252.47                80
 01/14/2023   11:21:31   (   0.00,-137.14) (   0.76,-140.34)  365.96                80