Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 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)
 05/01/2023   10:38:26   (   0.00,-137.00) (   0.28,-138.21)  137.81                80
 05/02/2023   10:17:03   (  -0.00,-137.00) (  -0.76,-133.69)  378.29                80
 05/03/2023   22:39:00   (   0.00,-137.00) (  -0.43,-139.00)  227.52                80
 05/04/2023   22:22:56   (   0.00,-137.00) (   0.55,-134.46)  288.17                80
 05/06/2023   10:44:45   (  -0.00,-136.99) (   0.59,-139.75)  313.52                80
 05/07/2023   10:23:21   (  -0.00,-136.98) (  -0.40,-135.22)  201.46                80
 05/08/2023   22:45:18   (   0.00,-136.96) (  -0.78,-140.53)  406.36                80
 05/09/2023   22:29:13   (   0.00,-136.94) (   0.21,-135.99)  108.04                80
 05/11/2023   10:51:02   (   0.01,-136.92) (   0.98,-141.27)  494.99                80
 05/12/2023   10:29:37   (   0.02,-136.91) (  -0.01,-136.73)   19.38                80
 05/14/2023   22:32:50   (  -0.02,-136.86) (  -0.16,-137.52)   75.07                80