From email@example.comTue Mar 25 09:38:05 1997 Date: Wed, 12 Feb 1997 18:11:27 -0800 From: firstname.lastname@example.org To: email@example.com Cc: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org Subject: WG Mtg #115 Minutes IPAC 2MASS Working Group Meeting #115 Minutes 2/11/97 Attendees: R. Beck, T. Chester, R. Cutri, T. Evans, J. Fowler, L. Fullmer, T. Jarrett, G. Kopan, H. McCallon, B. Wheaton, S. Wheelock, J. White AGENDA 1.) Status Reports DISCUSSION 1.) Status Reports A.) R. Beck Software deliveries were processed and pipeline tests were run. B.) R. Cutri The telescope optics are due to be installed about now. First light is expected 2/17. The 2MAPPS runtimes are about double their FDD guidelines. C.) T. Evans MAPCOR liens at this point include checking all output for bugs and input parameter optimization. Statistical and quality output are currently being added. Work is underway on tracking down bugs in the pipeline output. Work on DBMAN has begun. D.) J. Fowler The DARKS code and SDS have been modified to implement changes suggested by M. Skrutskie and E. Howard. PFPrep has been modified to limit the number of FREXAS detections per frame on the basis of brightness so that the brightest detections will be used and no panel bias will be introduced. BANDMERGE statistical processing design has been finished and coding is underway. E.) L. Fullmer CONMAN was redelivered with more match statistics. Plots of these statistics have brought to light a precision problem in another subsystem. Investigation is still underway concerning the validity of some extractions that look like they may be "split". F.) G. Kopan A new noise estimator was implemented in the PIXPHOT find step. Bugs were fixed in PIXPHOT and FREXAS. An investigation is underway of the PIXPHOT FIND completeness vs. FWHM. Work was done in support of the survey scheduler design and the survey database manager design, including creation of the first version of database manager SIS srv01. G.) H. McCallon I. PFPrep Status: 1) Changes were made to eliminate system sort on very large files; the system sort uses scratch disk space and could cause problems in high-density fields if insufficient disk space were available. PFPrep now uses an index sort which requires much less space and is done in core; this is both safer and faster. 2) Changes were made to limit number of Read2-Read1 extractions per frame based on magnitude sort. 3) All stop statements have been replaced with exit calls. II. PosFrm Status: 1) Capability to use the samples of real Tycho data has been added. 2) Efficiency of position matching has been improved. 3) All stop statements have been replaced with exit calls. 4) A number of the routines borrowed from SlvAll (in the haste to have something pipeline-ready for the Dec. 3rd delivery) have been rewritten for maximum robustness and maintainability; many more to go. H.) S. Wheelock CALMON: Version 0.40 of CALMON was delivered Feb 5. This version has the major functionality of CALMON to determine the zero point via a nightly average or linear fit based on RMS values. The 4-hour fit is computed, but the logic concerning when to use it is TBD. Some major SIS changes occur with this delivery. Standard Star files now carry a version ID to assist in distinguishing which set of standards for a field were used in determining calibration. The calibration parameter file cal03 contains more information regarding the nightly calculations. Additional information includes which algorithm was used in determining the scan zero point and which standard star file was used. SMERGE: Utility SMERGE was modified to work with 3-channel data and used in the C&R analysis described below. C&R: The internal completeness and reliability analysis for k band only using calibration scans 022-027 is complete. The results are encouraging for the 2MAPPS processing but do highlight some processing problems which are stated below. In addition to the internal scan-to-scan C&R analysis, all 6-times-confirmed sources from the 2MAPPS processing were matched with 6-times-confirmed sources from the protocam data as well as the deep field coadd created by Roc. All non-matches were examined. All problems found in this analysis have been passed on to the responsible party. Problems found in performing this analysis are as follows. Sources that fell at the end of descending scans and within the short coadd were missed. Some sources that were 6-times-confirmed in the protocam processing had psfmag=99.9 in the 2MAPPS processed data. One source appears to have been inappropriately band-merged. Many R1 single detections occurred at faint R1 magnitudes. Some sources had multiple detections within a single scan. I.) J. White Worked was done on compression and cascading. No final decision has been made regarding its use. The reduced total cost of tapes may not be cost effective compared to implementation and maintenance cost. TAPELOAD was delivered as is; it is still not unit tested and needs observatory data. COPYCAT (raw disk to tape) was delivered as is; it is still not unit tested and also needs observatory data. RDFRAME was redelivered with a new center frame computation EQSPDX subroutine from H. McCallon. A minor change to Obs/IPAC I/F Document Rev J was requested: add Scan Direction to par file. A couple of suggestions regarding new fields added by the observatory were passed along to Mike Rudenko.