Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 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)
 08/18/2023   22:34:41   (  -0.01,-137.01) (  -0.11,-137.44)   49.81                80
 08/19/2023   22:13:18   (  -0.01,-137.00) (   0.93,-132.92)  466.04                80
 08/21/2023   10:37:46   (   0.01,-137.00) (   0.29,-138.19)  135.66                80
 08/22/2023   10:16:23   (   0.01,-137.00) (  -0.75,-133.67)  379.70                80
 08/23/2023   22:38:20   (  -0.01,-136.98) (  -0.43,-138.98)  226.86                80
 08/24/2023   22:22:16   (  -0.01,-136.97) (   0.56,-134.44)  287.92                80
 08/26/2023   10:44:04   (   0.01,-136.95) (   0.65,-139.71)  315.57                80
 08/27/2023   10:22:40   (   0.01,-136.93) (  -0.39,-135.19)  198.59                80
 08/28/2023   22:44:37   (  -0.02,-136.90) (  -0.84,-140.49)  409.64                80
 08/29/2023   22:25:53   (  -0.02,-136.88) (   0.21,-135.97)  104.31                80