Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 6.  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)
 12/06/2022   22:40:54   (  -0.00,-136.92) (  -0.49,-139.13)  251.65                80
 12/07/2022   22:22:36   (  -0.01,-136.91) (   0.62,-134.05)  325.76                80
 12/09/2022   10:40:57   (   0.01,-136.93) (   0.36,-138.49)  178.58                80
 12/10/2022   10:17:19   (   0.01,-136.92) (  -0.77,-133.42)  398.38                80
 12/11/2022   22:35:52   (  -0.02,-136.88) (  -0.22,-137.91)  116.79                80
 12/12/2022   22:17:34   (  -0.01,-136.87) (   0.90,-132.83)  459.94                80
 12/14/2022   10:35:53   (   0.01,-136.87) (   0.11,-137.26)   44.70                80
 12/16/2022   22:33:29   (   0.00,-136.81) (   0.05,-136.68)   15.14                80
 12/18/2022   10:51:47   (  -0.00,-136.81) (   0.96,-141.10)  489.11                80
 12/19/2022   10:28:09   (  -0.00,-136.79) (  -0.19,-136.03)   86.81                80