[daip] New Ticket - [!PUG-910499]: UVCON, UVPLT, UVPRT & FITAB
Chiara Ferrari
do-not-reply at nrao.edu
Wed Apr 21 11:42:14 EDT 2010
New Ticket: UVCON, UVPLT, UVPRT & FITAB
Hello.
I have run UVCON on a simulated map (2048*2048, 1415 MHz) to simulate VLA-C observations.
I have the plotted the uv-coverage using UVPLT (see attached file uvplt.tiff), and extracted the uvdata from AIPS using both UVPRT and FITAB. I have then plotted the uv-coverage using the extracted uvdata, and I get a plot in which u goes from ~ -8 kilo_Lamda to ~ 16 kilo_Lambda (see uv.tiff). For v, everything is fine. Note that:
a) the files extracted both with FITAB and UVPRT contains all the visibilities of the original uv file inside AIPS (1512459 visibilities)
b) the problem is not in the program used to do the plot, since the output of FITAB has u values in the range -8 - 16 kilo_Lambda.
If I run UVPLT with parameters 6,3,0, I get the attache plot u_base.tiff
I have used AIPS 31DEC10 and I attach the parameters used in the different tasks here in the following.
*** UVCON ***
AIPS 1: UVCON Generates UV data for a given array and model
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INFILE 'AIPSTARS:VLA-C_UVCON' Antenna location file name
AIPS 1: IN2FILE *all ' ' TSYS and Efficiency
AIPS 1: BLANK=>INFILE's data are used
AIPS 1: for TSYS and Efficiency
AIPS 1: OUTFILE *all ' ' Antenna location file name
AIPS 1: Positions are in equatorial
AIPS 1: coordinate system.
AIPS 1: IN2NAME 'H_DS_1.4_RA0' Model image name (name)
AIPS 1: The both dimensions of the
AIPS 1: model must be 2**N pixels
AIPS 1: IN2CLASS 'IMAP' Model image name (class)
AIPS 1: IN2SEQ 1 Model image name (seq. #)
AIPS 1: IN2DISK 1 Model image disk unit #
AIPS 1: INVERS 0 CC file version #.
AIPS 1: OUTNAME 'H_DS_1.4_RA0' Output UV file name (name)
AIPS 1: OUTCLASS ' ' Output UV file name (class)
AIPS 1: OUTSEQ 0 Output UV file name (seq. #)
AIPS 1: OUTDISK 1 Output UV file disk unit #.
AIPS 1: NMAPS 0 No. maps to use for model.
AIPS 1: BCOMP *all 0 First CLEAN comp to sub.
AIPS 1: 1 per field. 0 => 1
AIPS 1: NCOMP *all 0 Last CLEAN comp to sub.
AIPS 1: to use (0 => all)
AIPS 1: FLUX 0 Lowest CC component used.
AIPS 1: CMETHOD ' ' Modeling method:
AIPS 1: 'DFT','GRID'; ' '=>DFT
AIPS 1: CMODEL 'IMAG' Model type: 'COMP','IMAG'
AIPS 1: ' ' => 'COMP' => CC compon
ents
AIPS 1: 'IMAG' => image
AIPS 1: FACTOR 0 Factor times model fluxes.
AIPS 1: 0 => 1
AIPS 1: SMODEL *all 0 Source model, 1=flux,2=x,3=y
AIPS 1: See 'explain'.
AIPS 1: RASHIFT *all 0 Shift of the model center
AIPS 1: relatively of the initial
AIPS 1: RA=0, per field (asec)
AIPS 1: DECSHIFT *all 0 Shift of the model center
AIPS 1: relatively of the initial
AIPS 1: declinat., given at APARM(3)
AIPS 1: per field (asec)
AIPS 1: APARM *all 0 Control information:
AIPS 1: BPARM *all 0 Control information:
AIPS 1: CPARM *all 0 Frequencies of the group(IFs)
AIPS 1: begins
AIPS 1: 1: Number of the groups (IFs)
AIPS 1: 2-10 Frequency of group(IFs)
AIPS 1: begins in MHz
AIPS 1: BMAJ 0 FWHM major axis of the
AIPS 1: Gaussian primary beam, degree
AIPS 1: See help for the variable
AIPS 1: primary beam (BPARM(6)=5)
AIPS 1: BMIN 0 FWHM minor axis of the
AIPS 1: gaussian primary beam, degree
AIPS 1: BPA 0 Position angle of Gaussian
AIPS 1: primary beam, degree
AIPS 1: DO3DIMAG -1 1 => use W term calculating
AIPS 1: visibilities (only if
AIPS 1: CMETHOD='DFT', and
AIPS 1: CMODEL ='COMP')
AIPS 1: 0 => no W term calculating
AIPS 1: visibilities
*** UVPLT ***
AIPS 1: UVPLT Plots data from a u,v data base: multi-channel version
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: USERID 0 File owner number - ignored
AIPS 1: INNAME 'H_DS_1.4_RA0' Input UV file name (name)
AIPS 1: INCLASS 'UVCON' Input UV file name (class)
AIPS 1: INSEQ 1 Input UV file name (seq. #)
AIPS 1: INDISK 1 Input UV file disk unit #
AIPS 1: SOURCES *all ' ' Sources to plot, ' '=>all.
AIPS 1: QUAL -1 Qualifier -1=>all
AIPS 1: CALCODE ' ' Calibrator code ' '=>all
AIPS 1: STOKES ' ' Stokes type to select.
AIPS 1: SELBAND -1 Bandwidth to select (kHz)
AIPS 1: SELFREQ -1 Frequency to select (MHz)
AIPS 1: FREQID -1 Freq. ID to select.
AIPS 1: TIMERANG *all 0 Time range to select
AIPS 1: ANTENNAS *all 0 Antennas to plot
AIPS 1: BASELINE *all 0 Baselines with ANTENNAS
AIPS 1: UVRANGE 0 0 UV range in kilolambda.
AIPS 1: SUBARRAY 0 Subarray, 0 => all
AIPS 1: BCHAN 1 1st spectral channel #
AIPS 1: ECHAN 0 Last spectral channel #
AIPS 1: NCHAV 1 # of channels to average
AIPS 1: CHINC 1 Increment in channel #
AIPS 1: BIF 0 Low IF number to plot
AIPS 1: EIF 0 Highest IF number to plot
AIPS 1: DOCALIB -1 > 0 calibrate data & weights
AIPS 1: > 99 do NOT calibrate weights
AIPS 1: GAINUSE 0 CAL (CL or SN) table to apply
AIPS 1: DOPOL -1 If >0 correct polarization.
AIPS 1: BLVER -1 BL table to apply.
AIPS 1: FLAGVER 0 Flag table version
AIPS 1: DOBAND -1 If >0 apply bandpass cal.
AIPS 1: Method used depends on value
AIPS 1: of DOBAND (see HELP file).
AIPS 1: BPVER -1 Bandpass table version
AIPS 1: SMOOTH *all 0 Smoothing function. See
AIPS 1: HELP SMOOTH for details.
AIPS 1: XINC 4 Plot every XINC'th visibility
AIPS 1: 0 => 1.
AIPS 1: APARM *all 0 Control parameters for UV
AIPS 1: 1: min of W range, klambda
AIPS 1: 2: max of W range, klambda
AIPS 1: 3: plot both halfs of UV(W)?
AIPS 1: 0 => plot both halfs
AIPS 1: -1 => plot one UV half
AIPS 1: +1 => plot another U,V
AIPS 1: half
AIPS 1: BPARM 6 3 Control parameters
AIPS 1: *rest 0 1 : X-axis type 0=>UV dist
AIPS 1: DOWEIGHT 1 > 0 use weights in binning
AIPS 1: REFANT 0 > 0 => use REFANT for plot
AIPS 1: types 14, 15, 16, 18
AIPS 1: ROTATE 0 uv p.a. for projection
AIPS 1: (deg N->E); type 17 only
AIPS 1: FACTOR 0 Scale dots by FACTOR
AIPS 1: < 0 => connect dots too
AIPS 1: DO3COL 0 > 0 use 3-color to separate
AIPS 1: channels and IFs.
AIPS 1: LTYPE 3 Type of labeling: 1 border,
AIPS 1: 2 no ticks, 3 - 6 standard,
AIPS 1: 7 - 10 only tick labels
AIPS 1: <0 -> no date/time
AIPS 1: BADDISK *all 0 Disk to avoid for scratch.
AIPS 1: DOTV 1 > 0 Do plot on the TV, else
AIPS 1: make a plot file
AIPS 1: GRCHAN 0 Graphics channel 0 => 1.
*** FITAB ***
AIPS 1: FITAB: Task to write maps or uv data as tables on a FITS tape
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: DOALL -1 1 (T) do all, -1 (F) do 1st.
AIPS 1: INNAME 'H_DS_1.4_RA0' Image name(name). Standard.
AIPS 1: INCLASS 'UVCON' Image name(class). Standard.
AIPS 1: INSEQ 1 Image name(seq. #).
AIPS 1: INDISK 1 Disk drive #. 0 => any
AIPS 1: INTYPE 'UV' File type. Blank => any
AIPS 1: OUTTAPE 1 Tape drive #. 0 => 1
AIPS 1: DATAOUT 'AREA:H_DS_1.4_RA0.FITS'
AIPS 1: Disk file name
AIPS 1: DOEOT 1 1 (T) go to end tape first.
AIPS 1: FORMAT 0 tape format: 0 => 3.
AIPS 1: 1 for 16-bit integer
AIPS 1: 2 for 32-bit integer
AIPS 1: 3 for 32-bit IEEE
AIPS 1: floating point
AIPS 1: 4 for 8-bit integer
AIPS 1: BLOCKING 10 tape blocking factor (<= 10)
AIPS 1: QUANTIZE 0 Quantize images written
AIPS 1: ***** BE CAREFUL!!!
AIPS 1: DOUVCOMP -1 > 0 => write compressed form
AIPS 1: of uv data in output tables
AIPS 1: NPIECE 0 Break uv data into NPIECE
AIPS 1: pieces
AIPS 1: BDROP 0 Don't write the first BDROP
AIPS 1: pieces
AIPS 1: CATNO 0 0 Limit range of DOALL
Ticket Details
===================
Ticket ID: PUG-910499
Department: AIPS Data Processing
Priority: Default
Status: Open
Link: https://help.nrao.edu/staff/index.php?_m=tickets&_a=viewticket&ticketid=161
-------------- next part --------------
A non-text attachment was scrubbed...
Name: u_base.tiff
Type: image/tiff
Size: 32282 bytes
Desc: not available
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20100421/5e490e25/attachment.tiff>
More information about the Daip
mailing list