Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 3.  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)
 10/03/2023   10:29:00   (   0.01,-137.00) (  -0.04,-136.75)   28.39                80
 10/05/2023   22:34:51   (  -0.01,-137.01) (  -0.14,-137.52)   59.25                80
 10/06/2023   22:13:26   (  -0.00,-137.01) (   0.91,-133.00)  457.24                80
 10/08/2023   10:37:53   (   0.00,-137.01) (   0.29,-138.26)  142.88                80
 10/09/2023   10:16:27   (  -0.00,-137.00) (  -0.71,-133.72)  373.36                80
 10/10/2023   22:38:23   (   0.01,-137.00) (  -0.44,-139.03)  231.89                80
 10/11/2023   22:22:18   (   0.00,-136.99) (   0.57,-134.50)  284.63                80
 10/13/2023   10:41:24   (   0.01,-136.99) (   0.62,-139.76)  315.54                80
 10/14/2023   10:25:19   (   0.02,-136.98) (  -0.38,-135.23)  200.62                80
 10/15/2023   22:44:34   (  -0.03,-136.97) (  -0.80,-140.53)  405.23                80
 10/16/2023   22:28:29   (  -0.03,-136.95) (   0.21,-135.99)  110.36                80