Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 13.  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)
 08/13/2023   22:28:29   (  -0.00,-136.99) (   0.25,-135.94)  120.63                80
 08/15/2023   10:50:15   (   0.01,-136.98) (   0.95,-141.20)  480.70                80
 08/16/2023   10:28:48   (   0.01,-136.97) (  -0.04,-136.66)   35.49                80
 08/18/2023   22:31:56   (  -0.01,-136.95) (  -0.14,-137.42)   53.27                80
 08/19/2023   22:15:50   (  -0.01,-136.94) (   0.91,-132.89)  462.61                80
 08/21/2023   10:37:36   (   0.01,-136.92) (   0.28,-138.15)  139.64                80
 08/22/2023   10:16:09   (   0.01,-136.91) (  -0.71,-133.61)  375.67                80
 08/23/2023   22:38:04   (  -0.01,-136.88) (  -0.45,-138.91)  230.43                80
 08/24/2023   22:21:57   (  -0.01,-136.86) (   0.55,-134.37)  284.30                80
 08/26/2023   10:43:42   (   0.02,-136.82) (   0.64,-139.63)  319.74                80