deletions | additions       diff --git a/section_Velocity_Channel_Analysis_VCA__.tex b/section_Velocity_Channel_Analysis_VCA__.tex  index b5fea4e..e01ab7e 100644  --- a/section_Velocity_Channel_Analysis_VCA__.tex  +++ b/section_Velocity_Channel_Analysis_VCA__.tex 
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\section{Velocity Channel Analysis (VCA) or Velocity Coordinate SPectrum (VCS)}  \textit{Definition:} How similar two maps are that are integrated over some velocity channel range  {\it Note:} Attempts to isolate how fluctuations in velocity contribute to differences between spectral cubes.  When gas is optically thin density and velocity fluctuations are correlated; when gas is optically thick, they are uncorrelated and fluctuations are only in velocity.  {\it References:} Stanimiric \& Lazarian 2001