Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 11/07/2023   22:16:30   (  -0.00,-137.00) (   0.87,-133.10)  444.94                80
 11/09/2023   10:38:19   (   0.00,-137.01) (   0.33,-138.37)  156.13                80
 11/10/2023   10:16:56   (   0.00,-137.00) (  -0.68,-133.84)  359.50                80
 11/11/2023   22:38:54   (  -0.00,-136.99) (  -0.49,-139.16)  246.97                80
 11/12/2023   22:22:50   (  -0.00,-136.99) (   0.53,-134.63)  268.21                80
 11/14/2023   10:44:40   (  -0.00,-136.97) (   0.64,-139.91)  334.23                80
 11/15/2023   10:23:15   (   0.00,-136.96) (  -0.32,-135.37)  180.30                80
 11/16/2023   22:45:14   (  -0.00,-136.93) (  -0.82,-140.69)  428.03                80
 11/17/2023   22:29:09   (  -0.00,-136.91) (   0.16,-136.15)   86.06                80
 11/20/2023   10:29:34   (  -0.00,-136.86) (   0.02,-136.90)    4.52                80