Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 28.  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)
 08/28/2023   22:44:38   (   0.03,-136.98) (  -0.76,-140.51)  401.93                80
 08/29/2023   22:28:34   (   0.03,-136.97) (   0.23,-135.97)  113.12                80
 08/31/2023   10:50:23   (  -0.03,-136.96) (   0.90,-141.26)  489.02                80
 09/01/2023   10:31:38   (  -0.03,-136.95) (  -0.09,-136.73)   25.96                80
 09/03/2023   22:32:11   (   0.03,-136.91) (  -0.08,-137.51)   67.05                80
 09/04/2023   22:16:07   (   0.03,-136.90) (   0.91,-132.97)  447.50                80
 09/06/2023   10:35:15   (  -0.04,-136.88) (   0.27,-138.25)  155.75                80
 09/07/2023   10:19:11   (  -0.04,-136.86) (  -0.73,-133.72)  358.24                80
 09/08/2023   22:38:28   (   0.05,-136.82) (  -0.43,-139.03)  251.06                80
 09/09/2023   22:22:23   (   0.05,-136.80) (   0.57,-134.50)  262.69                80