Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 8.  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)
 03/08/2023   10:52:00   (  -0.00,-137.01) (   0.98,-141.38)  498.94                80
 03/09/2023   10:30:35   (  -0.00,-137.01) (  -0.02,-136.85)   17.54                80
 03/11/2023   22:33:46   (   0.00,-136.99) (  -0.13,-137.63)   72.35                80
 03/12/2023   22:17:40   (   0.00,-136.98) (   0.87,-133.09)  443.28                80
 03/14/2023   10:39:27   (  -0.00,-136.97) (   0.33,-138.36)  158.66                80
 03/15/2023   10:20:41   (  -0.00,-136.95) (  -0.68,-133.82)  356.29                80
 03/16/2023   22:39:56   (   0.01,-136.92) (  -0.50,-139.13)  251.49                80
 03/17/2023   22:23:51   (   0.01,-136.91) (   0.52,-134.60)  263.13                80
 03/19/2023   10:42:57   (  -0.01,-136.88) (   0.66,-139.86)  339.79                80
 03/20/2023   10:26:52   (  -0.01,-136.86) (  -0.36,-135.33)  174.79                80
 03/21/2023   22:46:06   (   0.01,-136.83) (  -0.85,-140.63)  433.22                80