Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 2.  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)
 07/02/2023   22:16:40   (  -0.01,-137.00) (   0.86,-133.03)  452.44                80
 07/04/2023   10:38:27   (   0.01,-137.01) (   0.29,-138.30)  147.15                80
 07/05/2023   10:17:02   (   0.00,-137.01) (  -0.71,-133.77)  369.36                80
 07/06/2023   22:38:57   (  -0.00,-137.00) (  -0.49,-139.07)  235.63                80
 07/07/2023   22:22:53   (   0.00,-137.00) (   0.57,-134.54)  280.93                80
 07/09/2023   10:44:39   (  -0.00,-137.01) (   0.63,-139.81)  318.94                80
 07/10/2023   10:23:13   (  -0.00,-137.00) (  -0.38,-135.27)  197.36                80
 07/11/2023   22:45:09   (  -0.00,-136.99) (  -0.81,-140.57)  408.24                80
 07/12/2023   22:29:03   (  -0.00,-136.99) (   0.20,-136.04)  107.80                80
 07/14/2023   10:50:51   (   0.00,-136.98) (   0.94,-141.31)  492.99                80
 07/15/2023   10:29:25   (   0.01,-136.97) (  -0.06,-136.78)   22.67                80