Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 1 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)
 01/09/2023   11:13:11   (   0.00,-137.33) (   0.27,-138.39)  122.06                80
 01/10/2023   10:52:11   (   0.01,-137.32) (  -0.74,-133.95)  383.51                80
 01/11/2023   23:14:47   (  -0.01,-137.31) (  -0.46,-139.40)  237.60                80
 01/12/2023   22:59:06   (  -0.01,-137.30) (   0.50,-134.95)  267.75                80
 01/14/2023   11:21:32   (   0.01,-137.29) (   0.73,-140.35)  349.11                80
 01/15/2023   11:00:32   (   0.01,-137.28) (  -0.28,-135.91)  155.69                80
 01/16/2023   23:23:06   (  -0.02,-137.25) (  -0.96,-141.35)  466.88                80
 01/17/2023   23:07:27   (  -0.02,-137.24) (   0.06,-136.91)   37.34                80
 01/20/2023   11:11:33   (   0.02,-137.19) (   0.15,-137.87)   77.78                80
 01/21/2023   10:50:32   (   0.02,-137.16) (  -0.81,-133.42)  425.64                80
 01/22/2023   23:13:07   (  -0.03,-137.12) (  -0.40,-138.86)  198.68                80