Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 14.  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)
 07/15/2023   10:29:25   (   0.01,-137.00) (  -0.05,-136.77)   25.82                80
 07/17/2023   22:32:34   (  -0.01,-136.98) (  -0.11,-137.54)   63.27                80
 07/18/2023   22:16:29   (  -0.01,-136.97) (   0.90,-133.01)  452.57                80
 07/20/2023   10:38:15   (   0.01,-136.96) (   0.28,-138.27)  149.53                80
 07/21/2023   10:16:50   (   0.01,-136.95) (  -0.73,-133.74)  366.06                80
 07/22/2023   22:38:44   (  -0.01,-136.93) (  -0.49,-139.03)  239.57                80
 07/23/2023   22:22:39   (  -0.01,-136.92) (   0.53,-134.50)  275.81                80
 07/25/2023   10:44:25   (   0.01,-136.89) (   0.65,-139.76)  327.03                80
 07/26/2023   10:25:39   (   0.01,-136.88) (  -0.37,-135.23)  187.85                80
 07/27/2023   22:44:54   (  -0.01,-136.85) (  -0.83,-140.53)  419.16                80