archive info The ACS preflight data archive is a collection gzipped FITS format files stored on cdrom according to a database entry number assigned by the ACS_AQUIRE software suite.
The database software was originally written for the Goddard High Resolution Spectrograph (GHRS) Hubble instrument program by Don Lindler and has since been made publicly available through the GSFC IDL Astronomy User's Library. This database software is noteworthy for its speed and versatility and has been adopted for use on such projects as the Space Telescope Imaging Spectrograph (STIS), IUE, and by Ball Aerospace ground support and spacecraft development teams.
The ACS_ACQUIRE acquisition software was originally developed for ACS by Don Lindler based on his pre-existing STIS software. Though it has since been maintained and modified by Jon McCann. It reads raw Science Data Image, Engineering Data Dump, or Engineering File Stream files and optionally a Standard Header Packet file. These files are interpreted and output as FITS data and header. When operating in LOG mode the software will populate the fields of our ACS_LOG database.
Each data file in the archive has four header types: standard, UDL, EDS1, EDS2.
The ACS_LOG database consists of entries, items, and values. Each database entry corresponds to a single instrument exposure and a unique database entry number. Each entry consists of a set of item/value pairs. The database contains the following items for each entry:
ENTRY FILENAME ROOTNAME OBSTYPE DATE-OBS TIME-OBS EXPSTART EXPEND EXPTIME STIMULUS ENVIRON SCLAMP DETECTOR DETECTID CCDAMP CCDGAIN CCDOFF CCDTEMPC CCDTEMP1 CCDTEMP2 OVER_AC OVER_BD OVER_V FILTER1 FW1POS FW1OFF FILTER2 FW2POS FW2OFF FILTER3 FW3POS FW3OFF FOLDPOS CALDOOR WSHUTPOS HSHUTPOS WFOCPOS WINNPOS WOUTPOS HFOCPOS HINNPOS HOUTPOS SUBARRAY CCDXSIZ CCDYSIZ CCDXCOR CCDYCOR MCPVOLT FIELDVLT MFIFOVR SBCTEMP TASTATUS CHKBXSIZ MAXCOUNT TARGETX TARGETY APERTURE APERX APERY SLEWX SLEWY DOFFX DOFFY CBLKSIZ WFCT1 BLKSLOST UNCWRDS MEBID NAXIS1 NAXIS2 FSW_VER ACQ_VER MGLOBAL RCFILE RASCCHNL RASCAPER RASCFOC TM2TIP TM2TILT RADMETER RADSIGNL LAMP LAMP_I FILTERA FILTERB FILTERC FILTERD FILTERE FILTERF FILTERX POLANGLE MONOWAVE MONOGRTG MONONSLT MONOXSLT SHPFILE SHPTIME COMMENTS ARCDISK STFFILE STFTIME1 STFTIME2 STFMODE STFTARG STFATTEN RADSGNL1 RADSGNL2 RADTIME1 RADTIME2 RAD_I1 RAD_I2 RAD_V1 RAD_V2 RAD_HV1 RAD_HV2 LAMP_I1 LAMP_I2 LAMP_V1 LAMP_V2
Any of these database items may be searched on using the ACS preflight database search.
When you have tailored your search and have found the database entry numbers you require, pay particular attention to the value of the ARCDISK item. It will indicate which archive cdrom you need.
On-site personnel: You have access to the archive cdrom storage cabinet in room 218. Be sure to sign the register before you borrow a disc and again when you return it.
Off-site personnel: Send an email to the acs-archive point of contact. You will be contacted by someone from the archive support group who will assist you. Please have specific information such as archive disc name/number for them. They will not help you search for the data you need.
