Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 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)
 01/06/2023   22:34:10   (  -0.00,-136.93) (  -0.17,-137.55)   71.76                80
 01/07/2023   22:18:05   (   0.00,-136.92) (   0.86,-133.02)  444.05                80
 01/09/2023   10:39:53   (  -0.01,-136.93) (   0.32,-138.29)  156.55                80
 01/10/2023   10:18:28   (  -0.01,-136.92) (  -0.71,-133.77)  358.95                80
 01/11/2023   22:40:24   (   0.01,-136.90) (  -0.46,-139.08)  248.56                80
 01/12/2023   22:24:19   (   0.01,-136.89) (   0.52,-134.54)  266.86                80
 01/14/2023   10:46:06   (  -0.02,-136.89) (   0.66,-139.82)  334.22                80
 01/15/2023   10:24:42   (  -0.02,-136.87) (  -0.38,-135.29)  180.64                80
 01/16/2023   22:46:37   (   0.02,-136.84) (  -0.83,-140.59)  428.42                80
 01/17/2023   22:30:33   (   0.03,-136.82) (   0.21,-136.07)   85.87                80
 01/20/2023   10:30:54   (  -0.04,-136.78) (  -0.02,-136.81)    3.55                80