Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 5.  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)
 09/06/2023   10:37:55   (  -0.01,-137.01) (   0.26,-138.25)  141.09                80
 09/07/2023   10:16:31   (  -0.02,-137.01) (  -0.74,-133.72)  374.99                80
 09/08/2023   22:38:28   (   0.02,-137.01) (  -0.42,-139.03)  230.26                80
 09/09/2023   22:22:23   (   0.03,-137.00) (   0.58,-134.50)  285.60                80
 09/11/2023   10:44:12   (  -0.03,-137.00) (   0.59,-139.77)  316.00                80
 09/12/2023   10:22:47   (  -0.03,-136.99) (  -0.42,-135.24)  199.68                80
 09/13/2023   22:44:45   (   0.04,-136.99) (  -0.73,-140.56)  406.13                80
 09/14/2023   22:28:40   (   0.04,-136.98) (   0.28,-136.03)  109.53                80
 09/16/2023   10:50:27   (  -0.04,-136.97) (   0.94,-141.29)  492.49                80
 09/17/2023   10:29:03   (  -0.04,-136.96) (  -0.07,-136.76)   22.77                80