VIEW

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VIEW

            MIRA\VIEW [ifb] [/CAL] [/GAINS] [/PHASES [phaseId] [irec]] [/SIGNAL [idu
                         [/MAP] [/PIXEL ipix] [/TRACES [trackLimits]] [/XPOL ipart]
                         [/ZOOM] [/DEROTATOR [frameAngle]] [/OTF]

        VIEW is MIRA's command for plotting the data of frontend-backend
        combination number ifb (default is 1). Alternatively, VIEW ifb1 ifb2
        concatenates bands ifb1 and ifb2 for plotting (for option /SIGNAL only), and
        VIEW ifb1 TO ifb2 concatenates all bands from ifb1 to ifb2.

        The item to be plotted is specified
        by one of the following options. Otherwise, the following defaults are
        provided: VIEW /CAL for chopper-wheel calibrations, VIEW /PHASES for all
        uncalibrated data, VIEW /SIGNAL for calibrated data (at least off
        subtracted) from a single position, respectively VIEW /MAP for OTF maps.

        VIEW /CAL
        For calibrations only. Plots the counts from the loads (sky, ambient,
        cold, respectively) versus time (for continuum backends. For spectral line
        backends, plots the subscan average of the dumps from the corresponding
        loads versus frequency. Calibration and weather parameters are also displaye
        (for HERA data only if option /PIXEL is used).

        VIEW /GAINS
        Plots the gainarray currently in use. For spectrometers only.

        VIEW /MAP
        Plots a pseudo-map (data values versus velocity and record number) for
        calibrated OTF data.

        VIEW /PHASES [phaseId] [irec]
        Plots the uncalibrated data against time (for continuum backends)
        respectively frequency and record number (for spectrometers), using
        phase phaseId (according to the observing procedure viewed, it defaults to O
        SKY, or FHI). By default, the scan average of all phases iphase in shown,
        otherwise record number irec.

        For on-offs with continuum backends, the mean flux and its estimated error a
        displayed (for HERA data please select a pixel). For continuum data taken
        with the beam switch, phase1-phase2 is plotted, where the leading phase1 is
        given by phaseId. For one of phaseId = 1, 2, ..., nphases, only the total
        power for the corresponding phase is shown.

        VIEW /PIXEL ipix
        By default, VIEW shows data for all HERA pixels. If you want to visualize
        only one pixel (e.g. together with option /ZOOM, see below), please use this
        option.

        VIEW /DEROTATOR [frameAngle]
        Plots HERA's derotator angle for the Nasmyth reference system, for the last
        scan read in. If frameAngle is not specified, the current position angle of
        HERa is used.

        VIEW /SIGNAL [idump]
        Plots calibrated data, as time series (for continuum drifts) respectively
        spectra (for spectrometers). For OTF maps, record number idump can be
        specified to plot a single spectrum.

        VIEW /TRACES [trackLimits]
        A tool to visualize the antenna speed and fast trace values. The plot
        distinguishes between the trace values, and their interpolation at the
        backend record time (used for further data processing). Optionally,
        parameter trackLimits [arc sec] can be used to narrow the plot limits for th
        tracking errors.

        VIEW [ipart] /XPOL
        Allows to plot the amplitude and phase of the cross correlation of
        orthogonally polarized receivers, as measured by a calibGrid procedure
        (only for VESPA data in XPOL mode). If the Stokes parameters of several
        spectral lines are simulteaneously measured, ipart sets the VESPA part
        (defaults to 1). In order to retrieve the amplitude and phase, please
        perform first a calibration.

        VIEW /ZOOM
        Plots and calls the interactive cursor to define a region for a zoom. Use
        the cursor to define the lower left and upper right corner (order does not
        matter).

        VIEW /OTF
        Displays a layout of points on the sky sampled by the OTF maps in the curren
        index list generated with FIND (latitude offset vs. longitude offset).