Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 17.  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)
 11/17/2023   22:29:11   (  -0.00,-137.00) (   0.20,-136.17)   95.22                80
 11/20/2023   10:32:16   (   0.01,-136.99) (   0.01,-136.90)    9.62                80
 11/22/2023   22:32:50   (  -0.01,-136.97) (  -0.19,-137.68)   82.53                80
 11/23/2023   22:16:46   (  -0.01,-136.96) (   0.84,-133.16)  432.64                80
 11/25/2023   10:35:56   (   0.02,-136.95) (   0.33,-138.44)  169.28                80
 11/26/2023   10:19:51   (   0.02,-136.94) (  -0.64,-133.90)  345.49                80
 11/27/2023   22:39:08   (  -0.03,-136.90) (  -0.56,-139.21)  262.67                80
 11/28/2023   22:20:25   (  -0.03,-136.89) (   0.48,-134.68)  251.66                80
 11/30/2023   10:42:13   (   0.03,-136.87) (   0.74,-139.95)  351.53                80