Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 12.  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)
 09/12/2023   10:22:47   (   0.01,-137.00) (  -0.38,-135.23)  201.85                80
 09/13/2023   22:44:44   (  -0.01,-137.01) (  -0.77,-140.55)  402.67                80
 09/14/2023   22:26:00   (  -0.01,-137.01) (   0.24,-136.02)  113.70                80
 09/16/2023   10:50:27   (   0.01,-137.01) (   0.98,-141.28)  487.14                80
 09/17/2023   10:29:02   (   0.01,-137.00) (  -0.04,-136.75)   28.77                80
 09/19/2023   22:32:14   (  -0.01,-136.99) (  -0.15,-137.52)   61.61                80
 09/20/2023   22:16:10   (  -0.01,-136.98) (   0.87,-133.00)  453.59                80
 09/22/2023   10:37:58   (   0.01,-136.96) (   0.28,-138.27)  149.26                80
 09/23/2023   10:16:33   (   0.01,-136.94) (  -0.68,-133.73)  365.30                80
 09/24/2023   22:38:29   (  -0.02,-136.91) (  -0.51,-139.04)  242.44                80
 09/25/2023   22:22:24   (  -0.02,-136.89) (   0.52,-134.51)  271.85                80