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   10:40:57   (   0.00,-136.94) (   0.37,-138.49)  177.11                80
 12/10/2022   10:17:19   (   0.00,-136.94) (  -0.76,-133.42)  400.39                80
 12/11/2022   22:35:52   (  -0.01,-136.91) (  -0.23,-137.91)  113.40                80
 12/12/2022   22:17:34   (  -0.01,-136.90) (   0.89,-132.83)  463.98                80
 12/14/2022   10:35:53   (   0.02,-136.91) (   0.12,-137.26)   40.09                80
 12/16/2022   22:33:29   (  -0.02,-136.87) (   0.05,-136.68)   21.93                80
 12/18/2022   10:51:47   (   0.02,-136.87) (   0.97,-141.10)  482.04                80
 12/19/2022   10:28:09   (   0.03,-136.86) (  -0.19,-136.03)   94.41                80
 12/20/2022   22:46:42   (  -0.03,-136.80) (  -0.87,-140.51)  422.77                80
 12/21/2022   22:28:23   (  -0.03,-136.78) (   0.27,-135.44)  153.18                80