Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 3.  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)
 08/05/2023   10:37:58   (   0.02,-137.00) (   0.28,-138.22)  138.49                80
 08/06/2023   10:16:32   (   0.02,-137.00) (  -0.70,-133.68)  378.18                80
 08/07/2023   22:38:26   (  -0.02,-136.99) (  -0.49,-138.97)  226.32                80
 08/08/2023   22:22:21   (  -0.02,-136.99) (   0.55,-134.45)  290.09                80
 08/10/2023   10:44:06   (   0.03,-136.98) (   0.66,-139.70)  310.55                80
 08/11/2023   10:22:40   (   0.03,-136.97) (  -0.39,-135.17)  205.39                80
 08/12/2023   22:44:34   (  -0.04,-136.95) (  -0.84,-140.46)  400.30                80
 08/13/2023   22:28:28   (  -0.04,-136.94) (   0.20,-135.93)  115.45                80
 08/15/2023   10:50:14   (   0.04,-136.93) (   1.00,-141.19)  485.91                80
 08/16/2023   10:28:47   (   0.04,-136.91) (   0.01,-136.65)   29.63                80