Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 28.  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)
 12/29/2022   10:46:09   (  -0.01,-136.94) (   0.64,-139.78)  324.17                80
 12/30/2022   10:24:45   (  -0.02,-136.94) (  -0.39,-135.25)  191.91                80
 12/31/2022   22:46:41   (   0.02,-136.93) (  -0.80,-140.56)  414.70                80
 01/01/2023   22:30:35   (  -0.02,-136.92) (   0.16,-136.02)  102.23                80
 01/03/2023   10:52:24   (   0.02,-136.93) (   0.98,-141.31)  498.02                80
 01/04/2023   10:30:58   (   0.02,-136.93) (   0.01,-136.77)   17.60                80
 01/06/2023   22:34:10   (  -0.02,-136.89) (  -0.16,-137.55)   75.55                80
 01/07/2023   22:18:06   (  -0.02,-136.88) (   0.88,-133.03)  439.48                80
 01/09/2023   10:39:53   (   0.01,-136.87) (   0.32,-138.30)  161.92                80
 01/10/2023   10:18:27   (   0.01,-136.86) (  -0.66,-133.76)  352.71                80