Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 1 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2023   11:00:32   (   0.00,-137.28) (  -0.29,-135.91)  156.01                80
 01/16/2023   23:23:06   (  -0.00,-137.26) (  -0.94,-141.35)  466.24                80
 01/17/2023   23:07:27   (  -0.00,-137.24) (   0.08,-136.91)   38.06                80
 01/20/2023   11:11:32   (   0.01,-137.19) (   0.18,-137.86)   77.09                80
 01/21/2023   10:50:32   (   0.01,-137.16) (  -0.85,-133.43)  426.45                80
 01/22/2023   23:13:06   (  -0.01,-137.12) (  -0.42,-138.85)  197.47                80
 01/23/2023   22:57:26   (  -0.01,-137.10) (   0.61,-134.42)  305.99                80
 01/25/2023   11:19:51   (   0.01,-137.06) (   0.61,-139.82)  313.62                80
 01/26/2023   10:58:51   (   0.01,-137.03) (  -0.36,-135.37)  189.64                80
 01/27/2023   23:21:24   (  -0.01,-136.99) (  -0.89,-140.80)  434.66                80
 01/28/2023   23:05:45   (  -0.01,-136.96) (   0.15,-136.36)   68.48                80