Summary of Data Quality Observations of 13/6/96 ----------------------------------------------- This report was generated on 9 July 1996 Array: 6.0C Fields: Calibrator 1934-638 Offset Calibrator 1934_a Blank Field 1934_b Frequencies: 1384 2368 4800 8640 MHz The offset calibrator field was offset in RA,DEC from 1934-638 by 0,420 arcsec at 1384 MHz 0,420 arcsec at 2368 MHz 0,120 arcsec at 4800 MHz 0,120 arcsec at 8640 MHz See the end of this document for an explanation of terms and the filenaming convention. See http://wwwnar.atnf.csiro.au/www/operations/dqo/dqo.html for information on the DQO program. The YX product on baseline 1-2 at 1384 and 4800MHz was found to be very junky - and was removed from the processing. ======================================================================== Visibility-based statistics --------------------------- Total observing time is 10.46 hours Flagging statistics after ATLOD ------------------------------- File Overall CA01 CA02 CA03 CA04 CA05 CA06 ---- ------- ---- ---- ---- ---- ---- ---- 1934-638.1384 19.6% 22.4% 22.5% 19.2% 17.9% 19.6% 16.1% 1934-638.2368 13.3% 13.2% 13.1% 14.0% 13.1% 14.8% 11.6% 1934-638.4800 6.1% 10.2% 10.1% 5.5% 3.4% 3.0% 4.6% 1934-638.8640 4.6% 5.7% 5.7% 5.5% 3.4% 3.0% 4.6% 1934_a.1384 12.9% 16.8% 16.6% 11.5% 11.0% 11.1% 10.7% 1934_a.2368 4.5% 5.7% 5.4% 4.4% 4.1% 3.9% 3.3% 1934_a.4800 2.3% 5.5% 5.7% 1.3% 0.3% 0.6% 0.3% 1934_a.8640 1.3% 1.4% 1.6% 2.3% 0.9% 1.1% 0.4% 1934_b.1384 12.5% 15.5% 15.5% 11.0% 10.9% 10.9% 11.2% 1934_b.2368 3.4% 3.3% 3.3% 3.5% 3.3% 3.4% 3.4% 1934_b.4800 1.7% 5.0% 5.0% 0.0% 0.0% 0.0% 0.0% 1934_b.8640 0.1% 0.1% 0.2% 0.1% 0.1% 0.1% 0.1% ---------------------------------------------- Closure phase statistics for the point sources ---------------------------------------------- File Th.Phase Sigmas ---- -------- ------ 1934-638.1384 0.013 9.69 1934-638.2368 0.019 2.89 1934-638.4800 0.031 1.39 1934-638.8640 0.063 2.44 1934_a.1384 0.014 11.57 1934_a.2368 0.023 5.57 1934_a.4800 0.030 1.63 1934_a.8640 0.077 2.03 --------------------------------------- Post-reduction flagging statistics ---------------------------------- File Overall CA01 CA02 CA03 CA04 CA05 CA06 ---- ------- ---- ---- ---- ---- ---- ---- 1934-638.1384-cal 39.8% 50.0% 49.7% 34.2% 33.7% 34.8% 36.6% 1934-638.2368-cal 25.7% 27.1% 28.1% 25.3% 24.3% 24.6% 24.7% 1934-638.4800-cal 13.6% 25.5% 25.6% 8.2% 7.7% 5.8% 8.4% 1934-638.8640-cal 7.3% 9.4% 7.8% 7.5% 7.0% 5.4% 6.7% 1934_a.1384-cal 27.9% 39.4% 38.3% 23.2% 23.2% 21.2% 22.1% 1934_a.2368-cal 14.2% 15.4% 15.1% 14.2% 13.7% 13.5% 13.1% 1934_a.4800-cal 8.9% 21.2% 23.1% 4.3% 1.4% 1.8% 1.5% 1934_a.8640-cal 1.9% 2.1% 2.2% 2.9% 1.4% 1.7% 1.0% 1934_b.1384-cal 26.9% 37.0% 36.9% 22.0% 21.8% 21.8% 21.7% 1934_b.2368-cal 14.7% 14.2% 14.0% 15.8% 14.4% 14.2% 15.6% 1934_b.4800-cal 8.5% 21.6% 21.7% 1.8% 1.9% 2.1% 1.8% 1934_b.8640-cal 2.1% 3.0% 1.8% 1.6% 1.5% 3.3% 1.6% ======================================================================== Image-based statistics ---------------------- File Th. RMS Sigmas D.R. Pk Val ---- ------- ------ ---- ------ 1934-638.1384.icln 1.27E-04 10.91 10805 14.936 1934-638.1384.qmap 1.27E-04 9.48 0.006 1934-638.1384.umap 1.27E-04 8.84 0.006 1934-638.1384.vmap 1.27E-04 4.31 0.003 1934-638.2368.icln 1.34E-04 14.99 5752 11.573 1934-638.2368.qmap 1.34E-04 6.44 0.004 1934-638.2368.umap 1.34E-04 6.16 0.005 1934-638.2368.vmap 1.34E-04 4.92 0.003 1934-638.4800.icln 1.10E-04 6.62 7979 5.825 1934-638.4800.qmap 1.10E-04 2.08 0.001 1934-638.4800.umap 1.10E-04 2.00 0.001 1934-638.4800.vmap 1.10E-04 1.67 0.001 1934-638.8640.icln 1.08E-04 2.92 8990 2.839 1934-638.8640.qmap 1.08E-04 1.14 0.001 1934-638.8640.umap 1.08E-04 1.06 0.001 1934-638.8640.vmap 1.08E-04 1.23 0.001 1934_a.1384.icln 1.21E-04 24.90 4302 13.007 1934_a.1384.qmap 1.21E-04 10.04 0.007 1934_a.1384.umap 1.21E-04 9.48 0.007 1934_a.1384.vmap 1.21E-04 4.28 0.003 1934_a.2368.icln 1.28E-04 20.00 3186 8.172 1934_a.2368.qmap 1.28E-04 59.24 17 0.131 1934_a.2368.umap 1.28E-04 37.97 0.038 1934_a.2368.vmap 1.28E-04 41.53 11 0.059 1934_a.4800.icln 1.06E-04 7.79 6287 5.197 1934_a.4800.qmap 1.06E-04 3.51 19 0.007 1934_a.4800.umap 1.06E-04 2.55 0.001 1934_a.4800.vmap 1.06E-04 1.75 0.001 1934_a.8640.icln 1.03E-04 2.62 7439 2.011 1934_a.8640.qmap 1.03E-04 16.96 14 0.025 1934_a.8640.umap 1.03E-04 11.74 0.009 1934_a.8640.vmap 1.03E-04 13.97 0.012 1934_b.1384.imap 1.18E-04 5.28 0.006 1934_b.1384.qmap 1.18E-04 1.09 0.001 1934_b.1384.umap 1.18E-04 1.11 0.001 1934_b.1384.vmap 1.18E-04 1.08 0.001 1934_b.2368.imap 1.26E-04 2.02 0.001 1934_b.2368.qmap 1.26E-04 1.03 0.001 1934_b.2368.umap 1.26E-04 1.14 0.001 1934_b.2368.vmap 1.26E-04 1.07 0.001 1934_b.4800.imap 1.08E-04 1.08 0.001 1934_b.4800.qmap 1.08E-04 1.03 0.000 1934_b.4800.umap 1.08E-04 1.04 0.001 1934_b.4800.vmap 1.08E-04 0.96 0.000 1934_b.8640.imap 1.06E-04 1.04 0.000 1934_b.8640.qmap 1.06E-04 0.92 0.000 1934_b.8640.umap 1.06E-04 0.96 0.000 1934_b.8640.vmap 1.06E-04 0.95 0.000 ======================================================================== Explanation of Terms: --------------------- Th.Phase The theoretical closure phase (in degrees) based on thermal noise arguments (for the 5-minute time averaging used). Th. RMS The theoretical RMS in an image based on thermal noise arguments. Sigmas The factor by which the relevant measure exceeds either of the above two theoretical levels. Ideally this should be 1. D.R. Dynamic range of an image, defined as the ratio of the peak absolute value divided by the RMS. For the CLEANed Stokes-I images of the calibrators, the RMS is evaluated outside the inner quarter of the image. Otherwise the RMS is evaluated over the entire image. Pk Val Peak value in an image in Jy. Explanation of File names: -------------------------- File names are of the form FIELD.FREQ Raw visibility data, giving the field name and observing frequency. FIELD.FREQ-cal Calibrated/flagged visibility data. FIELD.FREQ.TYPE Image of a portion of the primary beam. TYPE gives the Stokes parameter and whether the image is CLEANed ("cln") or a dirty image ("map").