Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 11.  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)
 09/11/2023   10:44:11   (   0.00,-136.99) (   0.64,-139.76)  315.74                80
 09/12/2023   10:22:46   (   0.00,-136.99) (  -0.37,-135.23)  199.86                80
 09/13/2023   22:44:44   (  -0.01,-136.98) (  -0.79,-140.54)  405.76                80
 09/14/2023   22:28:39   (  -0.01,-136.97) (   0.22,-136.01)  109.66                80
 09/16/2023   10:50:27   (   0.01,-136.96) (   1.00,-141.28)  492.89                80
 09/17/2023   10:29:02   (   0.01,-136.95) (  -0.02,-136.75)   22.23                80
 09/19/2023   22:32:15   (  -0.00,-136.91) (  -0.11,-137.53)   70.30                80
 09/20/2023   22:16:09   (  -0.00,-136.89) (   0.84,-132.99)  444.01                80
 09/22/2023   10:37:58   (   0.01,-136.86) (   0.30,-138.27)  160.58                80
 09/23/2023   10:16:32   (   0.01,-136.83) (  -0.66,-133.73)  353.05                80
 09/24/2023   22:38:29   (  -0.01,-136.79) (  -0.53,-139.03)  255.85                80