Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 29.  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) (   0.63,-139.78)  323.60                80
 12/30/2022   10:24:45   (   0.01,-136.94) (  -0.39,-135.26)  192.53                80
 12/31/2022   22:46:41   (  -0.01,-136.92) (  -0.80,-140.56)  414.36                80
 01/01/2023   22:30:36   (  -0.01,-136.92) (   0.17,-136.03)  101.53                80
 01/03/2023   10:52:24   (   0.00,-136.93) (   0.97,-141.31)  498.75                80
 01/04/2023   10:30:59   (   0.00,-136.92) (  -0.05,-136.78)   16.75                80
 01/06/2023   22:34:10   (  -0.00,-136.88) (  -0.16,-137.55)   76.66                80
 01/07/2023   22:18:06   (  -0.00,-136.87) (   0.87,-133.03)  438.35                80
 01/09/2023   10:39:53   (   0.01,-136.87) (   0.32,-138.30)  162.93                80
 01/10/2023   10:18:28   (   0.01,-136.85) (  -0.65,-133.76)  351.78                80
 01/11/2023   22:40:24   (  -0.01,-136.81) (  -0.52,-139.07)  257.39                80