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13.32 SPECTRAL

Almost all parts of AIPS are general enough to handle mutiple  
dimensions of data including multiple frequency channels in the  
uv domain and 3 or more dimensional "cubes" in the image domain.

ACFIT    Determine antenna gains from autocorrelations
AGAUS    Fits 1-dimensional Gaussians to absorption-line spectra
ALTDEF    Sets frequency vs velocity relationship into image header
ALTSWTCH    Switches between frequency and velocity in image header
AVSPC    Averages uv-data in the frequency domain
BASRM    Task to remove a spectral baseline from total power spectra
BCHAN    sets the beginning channel number
BDAPL    Applies a BD table to another data set
BLOAT    converts line data to greater number channels
BLPLT    Plots BLCAL tables in 2 dimensions as function of baseline and IF
BLSUM    sums images over irregular sub-images, displays spectra
BPASS    computes spectral bandpass correction table
BPASSPRM    Control adverb array for bandpass calibration
BPEPL    Plots bandpass tables overlaying multiple times like BPEDT
BPERR    Print and plot BPASS closure outputs
BPLOT    Plots bandpass tables in 2 dimensions as function of time
BPSMO    Smooths or interpolates bandpass tables to regular times
BPVER    specifies the version of the bandpass table to be applied
CHANNEL    sets the spectral channel number
CHANSEL    Array of start, stop, increment channel numbers to average
CHINC    the increment between selected channels
CPASS    computes polynomial spectral bandpass correction table
CUBIT    Model a galaxy’s density and velocity distribution from full cube
CVEL    shifts spectral-line UV data to a given velocity
DCHANSEL    Array of start, stop, increment channel #S + IF to avoid
DOAPPLY    Flag to indicate whether an operation is applied to the data
ECHAN    define an end for a range of channel numbers
FIXAL    least squares fit aliasing function and remove
FLGIT    flags data based on the rms of the spectrum
FQUBE    collects n-dimensional images into n+1-dimensional FREQID image
FRMAP    Task to build a map using fringe rate spectra
FRPLT    Task to plot fringe rate spectra
FTARS    Fits 1-dimensional polarization spectrum to Q/U text file
FTFLG    interactive flagging of UV data in channel-time using the TV
FXALIAS    least squares fit aliasing function and remove
HLPFTFLG    Interactive time-channel visibility Editor - run-time help
HLPLISPX    Fits spectral index model to data in text file - run-time help
HLPPCFLG    Interactive time-channel PC table Editor PCFLG - run-time help
HLPSPFLG    Interactive time-channel visibility Editor SPFLG - run-time help
HLPTVHUI    Interactive intensity-hue-saturation display - run-time help
HLPTVRGB    Interactive red-green-blue display - run-time help
HLPTVSPX    Fits 1-dimensional spectral index model to data - run-time help
HLPZAMAN    Fits 1-dimensional Zeeman model to absorption data - run-time help
HLPZEMAN    Fits 1-dimensional Zeeman model to data - run-time help
ICHANSEL    Array of start, stop, increment channel #S + IF to average
IMLIN    Fits and removes continuum emission from cube
IRING    integrates intensity / flux in rings / ellipses
ISPEC    Plots and prints spectrum of region of a cube
MCUBE    collects n-dimensional images into n+1-dimensional image
MODAB    Makes simple absorption/emission spectral-line image in I/V
MORIF    Combines IFs or breaks spectral windows into multiple windows (IFs)
NCHAV    Number of channels averaged in an operation
ORDER    Adverb used usually to specify the order of polynomial fit
PCASS    Finds amplitude bandpass shape from pulse-cal table data
PCFIT    Finds delays and phases using a pulse-cal (PC) table
PCPLT    Plots pulse-cal tables in 2 dimensions as function of time
PCVEL    shifts spectral-line UV data to a given velocity: planet version
PDVER    specifies the version of the spetral polarization table to use
PLCUB    Task to plot intensity vs x panels on grid of y,z pixels
PLRFI    Plots spectral statistics from output of VBRFI & VLBRF
POLANGLE    Intrinsic polarization angles for up to 30 sources
POSSM    Task to plot total and cross-power spectra.
PRRFI    Prints excess spectral statistics from output of VBRFI & VLBRF
QUFIX    determines Right minus Left phase difference, corrects cal files
REFREQ    Specifies the frequency to be uased as the reference
REIFS    Breaks spectral windows into multiple spectral windows (IFs)
RM2PL    Plots spectrum of a pixel with RMFIT fit
RMFIT    Fits 1-dimensional polarization spectrum to Q/U cube
RSPEC    Plots and prints spectrum of rms of a cube
SDLSF    least squares fit to channels and subtracts from SD uv data
SDVEL    shifts spectral-line single-dish data to a given velocity
SERCH    Finds line signals in transposed data cube
SMOTH    Task to smooth a subimage from upto a 7-dim. image
SPECFLUX    Specifies the flux at the reference frequency
SPECINDX    Spectral index used to correct calibrations
SPECPARM    Spectral index per polarization per source
SPECR    Spectral regridding task for UV data
SPECTRAL    Flag to indicate whether an operation is spectral or continuum
SPECURVE    Spectral index survature used to correct calibrations
SPFLG    interactive flagging of UV data in channel-TB using the TV
SPMOD    Modify UV database by adding a model with spectral lines
SPRMS    Plots spectral statistics of a selected subset of a uv data set
SQASH    Task to collapse several planes in a cube into one plane or row
SYSVEL    Systemic velocity
UJOIN    modifies UV data converting IFs to spectral channels
UV2TB    Converts UV autocorrelation spectra to tables
UVBAS    averages several channels and subtracts from uv data.
UVDEC    Decrements the number of spectral channels, keeping every nth
UVFRE    Makes one data set have the spectral structure of another
UVGLU    Glues UV data frequency blocks back together
UVLIN    Fits and removes continuum visibility spectrum, also can flag
UVLSD    least squares fit to channels and divides the uv data.
UVLSF    least squares fit to channels and subtracts from uv data.
UVMLN    edits data based on the rms of the spectrum
UVMOD    Modify UV database by adding a model incl spectral index
VBGLU    Glues together data from multiple passes thru the VLBA corr.
VBRFI    Plots spectral statistics of VLBA autocorrelation data for RFI
VLBABPSS    computes spectral bandpass correction table
VLBRF    Plots spectral statistics of VLBA autocorrelation data for RFI
VTEST    Measures velocity discrepancy across fields
WTSUM    Task to do a a sum of images weighted by other images
XBASL    Fits and subtracts nth-order baselines from cube (x axis)
XG2PL    Plots spectrum of a pixel with XGAUS/AGAUS and ZEMAN/ZAMAN fits
XG2XG    Changes number of components in an XG or ZE table creating new one
XGAUS    Fits 1-dimensional Gaussians to images: restartable
XPLOT    Plots image rows one at a time on graphics, TV, or plot file
ZAMAN    Fits 1-dimensional Zeeman model to absorption-line data
ZEMAN    Fits 1-dimensional Zeeman model to data

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