Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 6.  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)
 10/06/2023   22:16:07   (   0.00,-137.00) (   0.93,-133.00)  456.90                80
 10/08/2023   10:37:53   (  -0.00,-137.00) (   0.27,-138.26)  143.92                80
 10/09/2023   10:16:27   (  -0.00,-136.99) (  -0.73,-133.72)  372.25                80
 10/10/2023   22:38:23   (   0.01,-136.99) (  -0.47,-139.02)  232.75                80
 10/11/2023   22:22:17   (   0.01,-136.98) (   0.53,-134.49)  283.42                80
 10/13/2023   10:44:04   (  -0.01,-136.97) (   0.59,-139.77)  317.74                80
 10/14/2023   10:22:38   (  -0.00,-136.96) (  -0.36,-135.22)  198.09                80
 10/15/2023   22:44:33   (   0.01,-136.94) (  -0.81,-140.52)  407.92                80
 10/16/2023   22:28:28   (   0.01,-136.93) (   0.20,-135.99)  107.40                80
 10/18/2023   10:47:34   (  -0.01,-136.91) (   0.96,-141.25)  495.40                80
 10/19/2023   10:28:49   (  -0.02,-136.89) (  -0.06,-136.72)   18.98                80