Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 27.  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)
 12/27/2022   22:24:21   (  -0.01,-136.90) (   0.54,-134.51)  273.33                80
 12/29/2022   10:46:09   (   0.01,-136.91) (   0.67,-139.77)  327.17                80
 12/30/2022   10:24:44   (   0.01,-136.90) (  -0.35,-135.25)  188.17                80
 12/31/2022   22:46:40   (  -0.01,-136.87) (  -0.84,-140.56)  419.97                80
 01/01/2023   22:30:36   (  -0.01,-136.86) (   0.19,-136.03)   95.09                80
 01/04/2023   10:30:59   (   0.01,-136.84) (  -0.02,-136.77)    8.28                80
 01/06/2023   22:34:10   (  -0.01,-136.79) (  -0.19,-137.55)   86.93                80
 01/07/2023   22:18:05   (  -0.01,-136.77) (   0.84,-133.02)  427.28                80
 01/09/2023   10:39:52   (   0.01,-136.75) (   0.36,-138.29)  175.21                80