Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 7.  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)
 07/07/2023   22:22:52   (  -0.00,-137.00) (   0.56,-134.54)  281.07                80
 07/09/2023   10:44:39   (   0.02,-137.00) (   0.64,-139.80)  319.44                80
 07/10/2023   10:23:13   (   0.02,-136.99) (  -0.37,-135.27)  196.83                80
 07/11/2023   22:45:09   (   0.02,-136.99) (  -0.76,-140.58)  409.05                80
 07/12/2023   22:29:04   (   0.02,-136.98) (   0.25,-136.05)  106.92                80
 07/14/2023   10:50:50   (  -0.01,-136.97) (   0.94,-141.31)  494.80                80
 07/15/2023   10:29:25   (  -0.01,-136.95) (  -0.07,-136.78)   20.72                80
 07/17/2023   22:32:34   (   0.01,-136.92) (  -0.15,-137.53)   70.49                80
 07/18/2023   22:16:28   (   0.01,-136.91) (   0.87,-133.00)  444.67                80
 07/20/2023   10:38:14   (  -0.01,-136.88) (   0.32,-138.27)  158.03                80
 07/21/2023   10:16:49   (  -0.01,-136.87) (  -0.70,-133.73)  356.89                80