; GRIDR ;--------------------------------------------------------------- ;! makes an image from single-dish data ;# Task AP SingleDish Imaging ;----------------------------------------------------------------------- ;; Copyright (C) 1995, 1999 ;; Associated Universities, Inc. Washington DC, USA. ;; ;; This program is free software; you can redistribute it and/or ;; modify it under the terms of the GNU General Public License as ;; published by the Free Software Foundation; either version 2 of ;; the License, or (at your option) any later version. ;; ;; This program is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; ;; You should have received a copy of the GNU General Public ;; License along with this program; if not, write to the Free ;; Software Foundation, Inc., 675 Massachusetts Ave, Cambridge, ;; MA 02139, USA. ;; ;; Correspondence concerning AIPS should be addressed as follows: ;; Internet email: aipsmail@nrao.edu. ;; Postal address: AIPS Project Office ;; National Radio Astronomy Observatory ;; 520 Edgemont Road ;; Charlottesville, VA 22903-2475 USA ;----------------------------------------------------------------------- GRIDR LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC GRIDR: Task which makes an image from single dish data INNAME Input SD data (name) INCLASS Input SD data (class) INSEQ Input SD data (seq. #) INDISK 0.0 9.0 Input SD data disk drive # CHANNEL 0.0 3000.0 Freq. channel (0 for cont.) BIF 0.0 3000.0 If number (if any) to image STOKES Stokes' parameter to image. OUTNAME Output image name (name) OUTDISK 0.0 9.0 Output image disk drive # OUTSEQ 0.0 32000.0 Output seq. no. IMSIZE 32. 4096. Image size (X,Y) is pixels CELLSIZE 1.E-12 (X,Y) size of grid in asec SHIFT (X,Y) image shift in asec UVWTFN UV dist. weight function blank => uniform UVBOX 0. 128. Additional rows and columns used in weighting. Use 0. ZEROSP (1)=Min. convl. weight. XTYPE 0. 10. Conv. function type in x default spheroidal YTYPE 0. 10. Conv. function type in y default spheroidal XPARM Conv. function parms for x YPARM Conv. function parms for y BADDISK Disk drive #'s to avoid ---------------------------------------------------------------- GRIDR Type: Task Use: This task has been replaced for most applications by SDGRD. Grid single dish data into an image. Input data must be sorted into YX (NOT XY) order and have been converted into projected coordinated by SELSD. Adverbs: INNAME.....Input SD data file (name). blank=>any INCLASS....Input SD data file (class). blank=>any INSEQ......Input SD data file (seq. #). 0=>any INDISK.....Input SD data file disk drive #. 0=> any CHANNEL....Frequency channel to map (1 relative) Use 0 for continuum data. BIF........IF number to image. 0 => 1. STOKES.....Stokes' type of the desired image: 'I' => I polarization, 'Q' => Q polarization, 'U' => U polarization, 'V' => V polarization, 'RCP' => right circluar polarization, 'LCP' => left circluar polarization, ' ' => 'I' OUTNAME....Output image name (name). blank=>INNAME OUTDISK....The disk drive # of output images. 0 => highest with space. Note: OUTCLASS='IMAP' OUTSEQ.....Output sequence number. 0=> next available IMSIZE.....(X,Y) image size in pixels. Must be a power of 2 on each side from 32X32 to 4096X2048 CELLSIZE...(X,Y) pixel separation in asec. SHIFT......Probably wouldn't do what you expect: shifts the reference pixel by SHIFT(1)/CELL(1), -SHIFT(2)/CELL(2). The reference value is set by APARM (see above). For a normal Ra-Dec image, if both SHIFTs are > 0, the center of the image will be at a higher Ra and higher Dec than the reference point. UVWTFN.....Weighting function of (u-v) place. blank=>Uniform; 'NA'=>Natural UVBOX......(U,V) box size for smoothing. See HELP UVBOX. ZEROSP.....The first value is used to set the minimum sum of convolving function weights. 0=>0.01 XTYPE......Convolution function type in X-direction 1=Pillbox, 2=exponential, 3=Sinc, 4=Exp*Sinc, 5=Spheroidal, 6=exp*BESSJ1(x)/x. <= 0 or > 5 -> 5. YTYPE.....Convolution function type in Y-direction XPARM.....Array containing parameters for XTYPE. See HELP UVnTYPE when n=convolution type. YPARM.....Array containing parameters for YTYPE. BADDISK...Disk drive #'s to avoid for scratch files ----------------------------------------------------------------