Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 5.  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)
 04/05/2023   10:23:52   (   0.01,-137.01) (  -0.37,-135.28)  196.42                80
 04/06/2023   22:48:26   (  -0.01,-137.00) (  -0.80,-140.58)  408.66                80
 04/07/2023   22:29:40   (  -0.01,-136.99) (   0.20,-136.04)  107.80                80
 04/09/2023   10:51:25   (   0.02,-136.99) (   0.99,-141.31)  491.97                80
 04/10/2023   10:32:39   (   0.02,-136.98) (  -0.01,-136.77)   23.75                80
 04/12/2023   22:33:07   (  -0.01,-136.93) (  -0.14,-137.53)   68.30                80
 04/13/2023   22:17:00   (  -0.01,-136.91) (   0.87,-132.99)  446.91                80
 04/15/2023   10:36:05   (   0.01,-136.90) (   0.30,-138.26)  154.80                80
 04/16/2023   10:19:59   (   0.02,-136.88) (  -0.71,-133.72)  360.30                80
 04/17/2023   22:39:12   (  -0.01,-136.84) (  -0.49,-139.01)  247.57                80
 04/18/2023   22:23:06   (  -0.01,-136.82) (   0.52,-134.48)  267.29                80