Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 9.  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)
 12/09/2022   10:40:58   (   0.00,-136.94) (   0.33,-138.50)  177.07                80
 12/10/2022   10:17:19   (   0.00,-136.94) (  -0.81,-133.43)  400.46                80
 12/11/2022   22:35:52   (  -0.01,-136.91) (  -0.25,-137.90)  113.37                80
 12/12/2022   22:17:33   (  -0.01,-136.90) (   0.87,-132.83)  464.04                80
 12/14/2022   10:35:54   (   0.02,-136.91) (   0.08,-137.27)   39.93                80
 12/16/2022   22:33:28   (  -0.02,-136.87) (   0.03,-136.68)   21.89                80
 12/18/2022   10:51:47   (   0.02,-136.87) (   0.99,-141.10)  481.86                80
 12/19/2022   10:28:08   (   0.03,-136.86) (  -0.17,-136.03)   94.57                80
 12/20/2022   22:46:43   (  -0.03,-136.81) (  -0.83,-140.52)  422.59                80
 12/21/2022   22:28:23   (  -0.03,-136.79) (   0.26,-135.44)  153.39                80