Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 12.  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)
 06/12/2023   10:51:06   (  -0.01,-137.00) (   0.94,-141.34)  494.13                80
 06/13/2023   10:29:41   (  -0.01,-136.99) (  -0.04,-136.80)   22.12                80
 06/15/2023   22:32:53   (   0.02,-136.98) (  -0.11,-137.58)   68.20                80
 06/16/2023   22:16:48   (   0.02,-136.97) (   0.93,-133.05)  447.36                80
 06/18/2023   10:35:55   (  -0.03,-136.96) (   0.30,-138.31)  154.28                80
 06/19/2023   10:19:50   (  -0.03,-136.95) (  -0.74,-133.79)  360.97                80
 06/20/2023   22:39:06   (   0.03,-136.93) (  -0.43,-139.09)  246.29                80
 06/21/2023   22:23:01   (   0.03,-136.92) (   0.56,-134.56)  268.82                80
 06/23/2023   10:42:08   (  -0.04,-136.90) (   0.61,-139.83)  333.43                80
 06/24/2023   10:26:03   (  -0.04,-136.89) (  -0.38,-135.29)  181.50                80
 06/25/2023   22:45:19   (   0.04,-136.86) (  -0.77,-140.60)  426.34                80