Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 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)
 08/15/2023   10:50:15   (   0.02,-136.98) (   0.94,-141.20)  480.40                80
 08/16/2023   10:28:48   (   0.02,-136.97) (  -0.05,-136.66)   35.73                80
 08/18/2023   22:31:56   (  -0.02,-136.96) (  -0.13,-137.42)   52.76                80
 08/19/2023   22:15:50   (  -0.02,-136.94) (   0.86,-132.88)  463.08                80
 08/21/2023   10:37:36   (   0.03,-136.92) (   0.27,-138.15)  139.23                80
 08/22/2023   10:16:09   (   0.02,-136.91) (  -0.72,-133.61)  376.14                80
 08/23/2023   22:38:03   (  -0.03,-136.88) (  -0.50,-138.90)  229.83                80
 08/24/2023   22:21:56   (  -0.03,-136.86) (   0.50,-134.36)  284.98                80
 08/26/2023   10:43:41   (   0.04,-136.82) (   0.68,-139.62)  319.05                80
 08/27/2023   10:22:15   (   0.04,-136.79) (  -0.32,-135.08)  195.14                80