Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 1.  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)
 10/02/2023   10:50:25   (   0.00,-136.99) (   0.99,-141.28)  490.00                80
 10/03/2023   10:29:00   (   0.00,-136.98) (  -0.06,-136.76)   25.66                80
 10/05/2023   22:32:11   (  -0.00,-136.95) (  -0.12,-137.53)   65.07                80
 10/06/2023   22:16:06   (  -0.00,-136.94) (   0.87,-132.99)  450.22                80
 10/08/2023   10:37:53   (   0.00,-136.92) (   0.28,-138.26)  152.02                80
 10/09/2023   10:16:28   (   0.00,-136.91) (  -0.71,-133.73)  363.07                80
 10/10/2023   22:38:23   (  -0.00,-136.89) (  -0.49,-139.02)  243.80                80
 10/11/2023   22:22:17   (  -0.00,-136.87) (   0.51,-134.49)  271.23                80
 10/13/2023   10:44:05   (   0.00,-136.85) (   0.63,-139.76)  331.44                80
 10/14/2023   10:22:39   (   0.00,-136.83) (  -0.37,-135.23)  183.19                80