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Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE)
Level 0 SCAN Camera Image Data FITS files
May 27, 1994
1.0 Description of the Instrument
The Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE) was one of three ultraviolet telescopes on the ASTRO-1 payload which flew aboard the space shuttle Columbia during a nine day mission in December 1990 (December 2 through December 11). WUPPE is a 0.5m f/10 Cassegrain telescope and spectropolarimeter. It obtained simultaneous spectra and polarization measurements, with a spectral resolution of about 10A, from 1400 to 3200A. A set of halfwave plates at 6 different angles provided spectropolarimetric modulation with 10A resolution on point sources through apertures from 6 to 40 arcsec. A "Lyot" analyzer is used to provide 50-100A spectropolarimetric resolution on faint point targets and diffuse nebulae. The typical diffuse object aperture was 3x50 arcsec.
2.0 WUPPE1 Level 0 SCAN Data (ASTRO 1-01A):
The SCAN camera data were provided to the NSSDC in FITS files ordered by Object-ID and by Mission Elapsed Time (MET) day number. The SCAN data by MET day number contain the entire dataset acquired during the Astro 1 mission.
The raw spectrometer data (by MET DAY) consists of all the spectrometer data taken by WUPPE during the mission. This includes instrument background (standby) scans and scans taken while observing a science target. When the frametime of a scan is greater than 1 second, WUPPE also reads out a redundant scan in addition to the prime scan readout. Each scan is composed of 2048 16-bit integers (two arrays-A and B). Each 12 hour time slice of data contains thousands of raw spectrometer scans. The SCAN data (by Object) includes only the raw spectrometer data taken during observations of science targets, and the relevant background and offset scans taken before and after the observations.
3.0 WUPPE SCAN Camera Data FITS File naming convention
There are 10 WUPPE raw spectrometer scans in one level 0 raw spectrometer data FITS file.
3.1 SCAN FITS file names by Object ID
The files are named as follows:
WUPPE1_OBJECTID_PPPPPP_ZM_nnnn.FITS
where,
OBJECTID = The Mission Target List name. The names are common to the HUT, UIT and WUPPE instruments. The number of characters in OBJECT can vary from 3 to 8 characters. May be a mix of numbers and/or alphabetic information. May contain imbedded '-'s.
PPPPPP = The POINTING_ID is a 6 digit number representing the object identification number which was assigned during the ASTRO1 mission. Each shuttle pointing had a unique POINTING_ID number. There may be several pointings of a single object.
SN = Denotes Level 0 spectrometer data.
nnnn = Starting SCAN number of the FITS file
For example, FITS file "WUPPE1_BD284211_001014_SN_0001.fits" contains raw scans 1 through 10 that pertain to the 0010-14 observation of BD+28 4211. File "WUPPE1_BD284211_001014_SN_0011.fits" contains raw scans 11 through 20.
3.2 WUPPE SCAN FITS file names by MET Day Number
FITS file name = WUPPE1_DAYyz_SN_nnnn.FITS
where,
DAYyz = The mission elapsed time (MET) day number times 10 (eg. 00, 05, 10,... 80). Files are grouped into 12-hour periods for each DAYyz (MET time of y.z).
SN = Denotes Level 0 spectrometer camera data.
nnnn = Starting raw SCAN number from the original (12-hour time slice) spectrometer file.
For example, FITS file "WUPPE1_DAY05_SN_0001.FITS" contains raw scans 1 through 10 from day 0.5. "WUPPE1_DAY05_SN_0011.FITS" contains raw scans 11 through 20 from day 0.5.
4.0 Description of WUPPE ZOOM Camera FITS files
The FITS files were originally written on a digital DECstation 5000/240 using DEC FORTRAN for Ultrix RISC Systems, running Ultrix 4.2 at the University of Wisconsin. The FITSIO package, version 3.2, written by William Pence at the Goddard Spaceflight Center, was used to generate the FITS files. The files were delivered to NSSDC on unix "tar" (4mm) tapes and then loaded to NDADS.
Each SCAN FITS file is 60480 bytes in length (119 VMS blocks).
The set of basic header information includes the primary array keywords and keywords describing the instrument and data arrays and 16 keywords describing the telescope observational and engineering data for each of the 10 raw scans in the FITS file.
An example header of a FITS file is given below.
Each raw spectrometer data array data consists of 1024x2 integer*2 words. The FITS file then contains 1024x2x10 integer*2 words. If there were not enough scans to complete a 10 scan FITS file zero-filled data (a FILLER scan) were written to the FITS file. In addition, if the data in the original 12 hour time slice file were so corrupted as to be unreadable, a FILLER scan was written in its place.
See section 6.3 for (WUPPE1_DAY05_SN_0011.FITS) an example of a file containing FILLER scans.
5.0 Software
The program "specfitsread.f" was written to verify the contents of the sample Level 0 Spectrometer FITS files. It uses the GSFC FITSIO software package. This program, along with other WUPPE1 fortran programs, is available from NDADS.
6.0 Sample FITS SCAN File Headers
6.1 SCAN FITS File Header by Object ID
File name = WUPPE1_BD284211_001014__0001.FITS
SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 3 / number of data axes NAXIS1 = 1024 / length of data axis 1 NAXIS2 = 2 / length of data axis 2 NAXIS3 = 10 / length of data axis 3 COMMENT Each raw scan has 1024x2 data points COMMENT There are 10 raw scans in each FITS file CTYPE1 = 'Pixel ' / Pixel Number CRPIX1 = 1.0 / Reference pixel location CRVAL1 = 1.0 / Reference pixel coordinate value CDELT1 = 1.0 / Delta pixel number CTYPE2 = 'Row ' / Row Number CRPIX2 = 1.0 / Reference row location CRVAL2 = 1.0 / Reference row coordinate value CDELT2 = 1.0 / Delta row number COMMENT Row 1=A array counts per frame COMMENT Row 2=B array counts per frame CTYPE3 = 'Scan No.' / Scan Number CRPIX3 = 1.0 / Reference scan location CRVAL3 = 1.0 / Starting scan number, = SCANUM01 CDELT3 = 1.0 / Delta scan number ORIGIN = 'UW-Space Astronomy Lab' / Creator of FITS file DATE = 'Thu Mar 25 15:33:44 1993' / Date FITS file was created OBSERVAT= 'ASTRO-1 ' / Observatory TELESCOP= 'WUPPE ' / Telescope INSTRUME= 'SPECTROPOLARIMETER' / Instrument Used OBJECT = 'BD284211' / Object Observed ID = '0010-14 ' / Target ID PRIME = 'HUT ' / Prime Instrument EQUINOX = 1950.00 / Equinox for coordinates RA = 327.2391 / Right ascension in degrees DEC = 28.6261 / Declination in degrees GMTSTART= '342/20:39:56' / GMT start time of observation (incl. bkgs) GMTSTOP = '342/21:09:21' / GMT stop time of observation (incl. bkgs) METSTART= '6/13:50:55' / Mission Elapsed Time start time (incl. bkgs) METSTOP = '6/14:20:20' / Mission Elapsed Time stop time (incl. bkgs) SCANUM01= 1 / Raw Scan Number CURSEQ01= 342 / Current Sequence Number STATUS01= '9: STB ' / Instrument Status Mode FRMTIM01= 4.00 / Frametime for the scan (seconds) APER01 = 1 / Aperture Used FILT01 = 4 / Filter Used GMTTIM01= '342/20:39:56' / GMT stop time of data readout METTIM01= '6/13:50:55' / MET stop time of data readout SAT01 = 2.3 / %Saturation AVESIG01= 68.6 / Average Signal ((A+B)/2) BOS01 = -2.4 / Bright Object Sensor reading THERM01 = -34.1 / Instrument temperature (Centigrade) SAAFLG01= 0 / South Atlantic Anomaly status IMCS01 = 255 / IMCS status QUAL01 = 0 / SLDPF Quality Flag (max) SCAN01 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM02= 2 / Raw Scan Number CURSEQ02= 342 / Current Sequence Number STATUS02= '9: STB ' / Instrument Status Mode FRMTIM02= 4.00 / Frametime for the scan (seconds) APER02 = 1 / Aperture Used FILT02 = 4 / Filter Used GMTTIM02= '342/20:39:57' / GMT stop time of data readout METTIM02= '6/13:50:56' / MET stop time of data readout SAT02 = 2.3 / %Saturation AVESIG02= 68.6 / Average Signal ((A+B)/2) BOS02 = -2.2 / Bright Object Sensor reading THERM02 = -34.1 / Instrument temperature (Centigrade) SAAFLG02= 0 / South Atlantic Anomaly status IMCS02 = 255 / IMCS status QUAL02 = 0 / SLDPF Quality Flag (max) SCAN02 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM03= 3 / Raw Scan Number CURSEQ03= 342 / Current Sequence Number STATUS03= '9: STB ' / Instrument Status Mode FRMTIM03= 4.00 / Frametime for the scan (seconds) APER03 = 1 / Aperture Used FILT03 = 4 / Filter Used GMTTIM03= '342/20:40: 0' / GMT stop time of data readout METTIM03= '6/13:50:59' / MET stop time of data readout SAT03 = 2.3 / %Saturation AVESIG03= 68.7 / Average Signal ((A+B)/2) BOS03 = -2.2 / Bright Object Sensor reading THERM03 = -34.1 / Instrument temperature (Centigrade) SAAFLG03= 0 / South Atlantic Anomaly status IMCS03 = 255 / IMCS status QUAL03 = 0 / SLDPF Quality Flag (max) SCAN03 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM04= 4 / Raw Scan Number CURSEQ04= 342 / Current Sequence Number STATUS04= '9: STB ' / Instrument Status Mode FRMTIM04= 4.00 / Frametime for the scan (seconds) APER04 = 1 / Aperture Used FILT04 = 4 / Filter Used GMTTIM04= '342/20:40: 1' / GMT stop time of data readout METTIM04= '6/13:51: 0' / MET stop time of data readout SAT04 = 2.3 / %Saturation AVESIG04= 68.7 / Average Signal ((A+B)/2) BOS04 = -2.1 / Bright Object Sensor reading THERM04 = -34.1 / Instrument temperature (Centigrade) SAAFLG04= 0 / South Atlantic Anomaly status IMCS04 = 255 / IMCS status QUAL04 = 0 / SLDPF Quality Flag (max) SCAN04 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM05= 5 / Raw Scan Number CURSEQ05= 342 / Current Sequence Number STATUS05= '9: STB ' / Instrument Status Mode FRMTIM05= 4.00 / Frametime for the scan (seconds) APER05 = 1 / Aperture Used FILT05 = 4 / Filter Used GMTTIM05= '342/20:40: 4' / GMT stop time of data readout METTIM05= '6/13:51: 3' / MET stop time of data readout SAT05 = 2.3 / %Saturation AVESIG05= 68.7 / Average Signal ((A+B)/2) BOS05 = -2.1 / Bright Object Sensor reading THERM05 = -34.1 / Instrument temperature (Centigrade) SAAFLG05= 0 / South Atlantic Anomaly status IMCS05 = 255 / IMCS status QUAL05 = 0 / SLDPF Quality Flag (max) SCAN05 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM06= 6 / Raw Scan Number CURSEQ06= 342 / Current Sequence Number STATUS06= '9: STB ' / Instrument Status Mode FRMTIM06= 4.00 / Frametime for the scan (seconds) APER06 = 1 / Aperture Used FILT06 = 4 / Filter Used GMTTIM06= '342/20:40: 5' / GMT stop time of data readout METTIM06= '6/13:51: 4' / MET stop time of data readout SAT06 = 2.3 / %Saturation AVESIG06= 68.7 / Average Signal ((A+B)/2) BOS06 = -2.2 / Bright Object Sensor reading THERM06 = -34.2 / Instrument temperature (Centigrade) SAAFLG06= 0 / South Atlantic Anomaly status IMCS06 = 255 / IMCS status QUAL06 = 0 / SLDPF Quality Flag (max) SCAN06 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM07= 7 / Raw Scan Number CURSEQ07= 342 / Current Sequence Number STATUS07= '9: STB ' / Instrument Status Mode FRMTIM07= 4.00 / Frametime for the scan (seconds) APER07 = 1 / Aperture Used FILT07 = 4 / Filter Used GMTTIM07= '342/20:40: 8' / GMT stop time of data readout METTIM07= '6/13:51: 7' / MET stop time of data readout SAT07 = 2.3 / %Saturation AVESIG07= 68.7 / Average Signal ((A+B)/2) BOS07 = -2.2 / Bright Object Sensor reading THERM07 = -34.1 / Instrument temperature (Centigrade) SAAFLG07= 0 / South Atlantic Anomaly status IMCS07 = 255 / IMCS status QUAL07 = 0 / SLDPF Quality Flag (max) SCAN07 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM08= 8 / Raw Scan Number CURSEQ08= 342 / Current Sequence Number STATUS08= '9: STB ' / Instrument Status Mode FRMTIM08= 4.00 / Frametime for the scan (seconds) APER08 = 1 / Aperture Used FILT08 = 4 / Filter Used GMTTIM08= '342/20:40: 9' / GMT stop time of data readout METTIM08= '6/13:51: 8' / MET stop time of data readout SAT08 = 2.3 / %Saturation AVESIG08= 68.7 / Average Signal ((A+B)/2) BOS08 = -2.1 / Bright Object Sensor reading THERM08 = -34.1 / Instrument temperature (Centigrade) SAAFLG08= 0 / South Atlantic Anomaly status IMCS08 = 255 / IMCS status QUAL08 = 0 / SLDPF Quality Flag (max) SCAN08 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM09= 9 / Raw Scan Number CURSEQ09= 342 / Current Sequence Number STATUS09= '9: STB ' / Instrument Status Mode FRMTIM09= 4.00 / Frametime for the scan (seconds) APER09 = 1 / Aperture Used FILT09 = 4 / Filter Used GMTTIM09= '342/20:40:12' / GMT stop time of data readout METTIM09= '6/13:51:11' / MET stop time of data readout SAT09 = 2.3 / %Saturation AVESIG09= 68.6 / Average Signal ((A+B)/2) BOS09 = -2.2 / Bright Object Sensor reading THERM09 = -34.1 / Instrument temperature (Centigrade) SAAFLG09= 0 / South Atlantic Anomaly status IMCS09 = 255 / IMCS status QUAL09 = 0 / SLDPF Quality Flag (max) SCAN09 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM10= 10 / Raw Scan Number CURSEQ10= 342 / Current Sequence Number STATUS10= '9: STB ' / Instrument Status Mode FRMTIM10= 4.00 / Frametime for the scan (seconds) APER10 = 1 / Aperture Used FILT10 = 4 / Filter Used GMTTIM10= '342/20:40:13' / GMT stop time of data readout METTIM10= '6/13:51:12' / MET stop time of data readout SAT10 = 2.3 / %Saturation AVESIG10= 68.6 / Average Signal ((A+B)/2) BOS10 = -2.2 / Bright Object Sensor reading THERM10 = -34.1 / Instrument temperature (Centigrade) SAAFLG10= 0 / South Atlantic Anomaly status IMCS10 = 255 / IMCS status QUAL10 = 0 / SLDPF Quality Flag (max) SCAN10 = 'REDUNDANT SCAN' / Prime or Redundant Scan
6.2 SCAN FITS File Header by MET Day Number
WUPPE1_DAY05_SN_0001.FITS SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 3 / number of data axes NAXIS1 = 1024 / length of data axis 1 NAXIS2 = 2 / length of data axis 2 NAXIS3 = 10 / length of data axis 3 COMMENT Each raw scan has 1024x2 data points COMMENT There are 10 raw scans in each FITS file CTYPE1 = 'Pixel ' / Pixel Number CRPIX1 = 1.0 / Reference pixel location CRVAL1 = 1.0 / Reference pixel coordinate value CDELT1 = 1.0 / Delta pixel number CTYPE2 = 'Row ' / Row Number CRPIX2 = 1.0 / Reference row location CRVAL2 = 1.0 / Reference row coordinate value CDELT2 = 1.0 / Delta row number COMMENT Row 1=A array counts per frame COMMENT Row 2=B array counts per frame CTYPE3 = 'Scan No.' / Scan Number CRPIX3 = 1.0 / Reference scan location CRVAL3 = 1.0 / Starting scan number, = SCANUM01 CDELT3 = 1.0 / Delta scan number ORIGIN = 'UW-Space Astronomy Lab' / Creator of FITS file DATE = 'Tue Feb 23 19:15:09 1993' / Date FITS file was created OBSERVAT= 'ASTRO-1 ' / Observatory TELESCOP= 'WUPPE ' / Telescope INSTRUME= 'SPECTROPOLARIMETER' / Instrument Used SCANUM01= 1 / Raw Scan Number CURSEQ01= 0 / Current Sequence Number STATUS01= '9: STB ' / Instrument Status Mode FRMTIM01= 0.20 / Frametime for the scan (seconds) APER01 = 1 / Aperture Used FILT01 = 6 / Filter Used GMTTIM01= '336/20:59:59' / GMT stop time of data readout METTIM01= '0/14:10:58' / MET stop time of data readout SAT01 = 0.0 / %Saturation AVESIG01= -25.3 / Average Signal ((A+B)/2) BOS01 = -6.8 / Bright Object Sensor reading THERM01 = -20.1 / Instrument temperature (Centigrade) SAAFLG01= 0 / South Atlantic Anomaly status IMCS01 = 0 / IMCS status QUAL01 = 0 / SLDPF Quality Flag (max) SCAN01 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM02= 2 / Raw Scan Number CURSEQ02= 0 / Current Sequence Number STATUS02= '9: STB ' / Instrument Status Mode FRMTIM02= 0.20 / Frametime for the scan (seconds) APER02 = 1 / Aperture Used FILT02 = 6 / Filter Used GMTTIM02= '336/21: 0: 0' / GMT stop time of data readout METTIM02= '0/14:10:59' / MET stop time of data readout SAT02 = 0.0 / %Saturation AVESIG02= -25.7 / Average Signal ((A+B)/2) BOS02 = -6.8 / Bright Object Sensor reading THERM02 = -20.1 / Instrument temperature (Centigrade) SAAFLG02= 0 / South Atlantic Anomaly status IMCS02 = 0 / IMCS status QUAL02 = 0 / SLDPF Quality Flag (max) SCAN02 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM03= 3 / Raw Scan Number CURSEQ03= 0 / Current Sequence Number STATUS03= '9: STB ' / Instrument Status Mode FRMTIM03= 0.50 / Frametime for the scan (seconds) APER03 = 1 / Aperture Used FILT03 = 6 / Filter Used GMTTIM03= '336/21: 0: 2' / GMT stop time of data readout METTIM03= '0/14:11: 1' / MET stop time of data readout SAT03 = 3.5 / %Saturation AVESIG03= 14.4 / Average Signal ((A+B)/2) BOS03 = -6.8 / Bright Object Sensor reading THERM03 = -20.1 / Instrument temperature (Centigrade) SAAFLG03= 0 / South Atlantic Anomaly status IMCS03 = 0 / IMCS status QUAL03 = 0 / SLDPF Quality Flag (max) SCAN03 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM04= 4 / Raw Scan Number CURSEQ04= 0 / Current Sequence Number STATUS04= '9: STB ' / Instrument Status Mode FRMTIM04= 0.50 / Frametime for the scan (seconds) APER04 = 1 / Aperture Used FILT04 = 6 / Filter Used GMTTIM04= '336/21: 0: 3' / GMT stop time of data readout METTIM04= '0/14:11: 2' / MET stop time of data readout SAT04 = 3.5 / %Saturation AVESIG04= 13.7 / Average Signal ((A+B)/2) BOS04 = -6.8 / Bright Object Sensor reading THERM04 = -20.1 / Instrument temperature (Centigrade) SAAFLG04= 0 / South Atlantic Anomaly status IMCS04 = 0 / IMCS status QUAL04 = 0 / SLDPF Quality Flag (max) SCAN04 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM05= 5 / Raw Scan Number CURSEQ05= 0 / Current Sequence Number STATUS05= '9: STB ' / Instrument Status Mode FRMTIM05= 2.00 / Frametime for the scan (seconds) APER05 = 1 / Aperture Used FILT05 = 6 / Filter Used GMTTIM05= '336/21: 0: 6' / GMT stop time of data readout METTIM05= '0/14:11: 5' / MET stop time of data readout SAT05 = 15.2 / %Saturation AVESIG05= 443.5 / Average Signal ((A+B)/2) BOS05 = -6.8 / Bright Object Sensor reading THERM05 = -20.1 / Instrument temperature (Centigrade) SAAFLG05= 0 / South Atlantic Anomaly status IMCS05 = 0 / IMCS status QUAL05 = 0 / SLDPF Quality Flag (max) SCAN05 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM06= 6 / Raw Scan Number CURSEQ06= 0 / Current Sequence Number STATUS06= '9: STB ' / Instrument Status Mode FRMTIM06= 2.00 / Frametime for the scan (seconds) APER06 = 1 / Aperture Used FILT06 = 6 / Filter Used GMTTIM06= '336/21: 0: 7' / GMT stop time of data readout METTIM06= '0/14:11: 6' / MET stop time of data readout SAT06 = 15.2 / %Saturation AVESIG06= 443.5 / Average Signal ((A+B)/2) BOS06 = -6.8 / Bright Object Sensor reading THERM06 = -20.1 / Instrument temperature (Centigrade) SAAFLG06= 0 / South Atlantic Anomaly status IMCS06 = 0 / IMCS status QUAL06 = 0 / SLDPF Quality Flag (max) SCAN06 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM07= 7 / Raw Scan Number CURSEQ07= 0 / Current Sequence Number STATUS07= '9: STB ' / Instrument Status Mode FRMTIM07= 2.00 / Frametime for the scan (seconds) APER07 = 1 / Aperture Used FILT07 = 6 / Filter Used GMTTIM07= '336/21: 0: 9' / GMT stop time of data readout METTIM07= '0/14:11: 8' / MET stop time of data readout SAT07 = 15.2 / %Saturation AVESIG07= 434.7 / Average Signal ((A+B)/2) BOS07 = -6.8 / Bright Object Sensor reading THERM07 = -20.1 / Instrument temperature (Centigrade) SAAFLG07= 0 / South Atlantic Anomaly status IMCS07 = 0 / IMCS status QUAL07 = 0 / SLDPF Quality Flag (max) SCAN07 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM08= 8 / Raw Scan Number CURSEQ08= 0 / Current Sequence Number STATUS08= '9: STB ' / Instrument Status Mode FRMTIM08= 2.00 / Frametime for the scan (seconds) APER08 = 1 / Aperture Used FILT08 = 6 / Filter Used GMTTIM08= '336/21: 0:10' / GMT stop time of data readout METTIM08= '0/14:11: 9' / MET stop time of data readout SAT08 = 15.2 / %Saturation AVESIG08= 434.7 / Average Signal ((A+B)/2) BOS08 = -6.8 / Bright Object Sensor reading THERM08 = -20.1 / Instrument temperature (Centigrade) SAAFLG08= 0 / South Atlantic Anomaly status IMCS08 = 0 / IMCS status QUAL08 = 0 / SLDPF Quality Flag (max) SCAN08 = 'REDUNDANT SCAN' / Prime or Redundant Scan SCANUM09= 9 / Raw Scan Number CURSEQ09= 0 / Current Sequence Number STATUS09= '9: STB ' / Instrument Status Mode FRMTIM09= 2.00 / Frametime for the scan (seconds) APER09 = 1 / Aperture Used FILT09 = 6 / Filter Used GMTTIM09= '336/21: 0:11' / GMT stop time of data readout METTIM09= '0/14:11:10' / MET stop time of data readout SAT09 = 15.2 / %Saturation AVESIG09= 426.4 / Average Signal ((A+B)/2) BOS09 = -6.8 / Bright Object Sensor reading THERM09 = -20.1 / Instrument temperature (Centigrade) SAAFLG09= 0 / South Atlantic Anomaly status IMCS09 = 0 / IMCS status QUAL09 = 0 / SLDPF Quality Flag (max) SCAN09 = 'PRIME SCAN' / Prime or Redundant Scan SCANUM10= 10 / Raw Scan Number CURSEQ10= 0 / Current Sequence Number STATUS10= '9: STB ' / Instrument Status Mode FRMTIM10= 2.00 / Frametime for the scan (seconds) APER10 = 1 / Aperture Used FILT10 = 6 / Filter Used GMTTIM10= '336/21: 0:12' / GMT stop time of data readout METTIM10= '0/14:11:11' / MET stop time of data readout SAT10 = 15.2 / %Saturation AVESIG10= 426.4 / Average Signal ((A+B)/2) BOS10 = -6.8 / Bright Object Sensor reading THERM10 = -20.1 / Instrument temperature (Centigrade) SAAFLG10= 0 / South Atlantic Anomaly status IMCS10 = 0 / IMCS status QUAL10 = 0 / SLDPF Quality Flag (max) SCAN10 = 'REDUNDANT SCAN' / Prime or Redundant Scan END
6.3 SCAN File with "Filler" images.
FITS file = WUPPE1_DAY05_SN_0011.FITS
Note that the last 2 scans in the file are filler scans.
Abbreviated header, to save space.
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 1024 / length of data axis 1
NAXIS2 = 2 / length of data axis 2
NAXIS3 = 10 / length of data axis 3
COMMENT Each raw scan has 1024x2 data points
COMMENT There are 10 raw scans in each FITS file
CTYPE1 = 'Pixel ' / Pixel Number
CRPIX1 = 1.0 / Starting pixel number
CRVAL1 = 1.0 / Starting pixel value
CDELT1 = 1.0 / Delta pixel number
CTYPE2 = 'Row ' / Row Number
CRPIX2 = 1.0 / Starting row number
CRVAL2 = 1.0 / Starting row value
CDELT2 = 1.0 / Delta row number
COMMENT Row 1=A array counts per frame
COMMENT Row 2=B array counts per frame
CTYPE3 = 'Scan No.' / Scan Number
CRPIX3 = 1.0 / Starting scan number
CRVAL3 = 11.0 / Starting scan value
CDELT3 = 1.0 / Delta scan number
ORIGIN = 'UW-Space Astronomy Lab' / Creator of FITS file
DATE = 'Tue Feb 23 19:15:09 1993' / Date FITS file was created
OBSERVAT= 'ASTRO-1 ' / Observatory
TELESCOP= 'WUPPE ' / Telescope
INSTRUME= 'SPECTROPOLARIMETER' / Instrument Used
SCANUM01= 11 / Raw Scan Number
CURSEQ01= 0 / Current Sequence Number
STATUS01= '9: STB ' / Instrument Status Mode
FRMTIM01= 2.00 / Frametime for the scan (seconds)
APER01 = 1 / Aperture Used
FILT01 = 6 / Filter Used
GMTTIM01= '336/21: 0:13' / GMT stop time of data readout
METTIM01= '0/14:11:12' / MET stop time of data readout
SAT01 = 14.5 / %Saturation
AVESIG01= 418.3 / Average Signal ((A+B)/2)
BOS01 = -6.8 / Bright Object Sensor reading
THERM01 = -20.1 / Instrument temperature (Centigrade)
SAAFLG01= 0 / South Atlantic Anomaly status
IMCS01 = 0 / IMCS status
QUAL01 = 0 / SLDPF Quality Flag (max)
SCAN01 = 'PRIME SCAN' / Prime or Redundant Scan
SCANUM02= 12 / Raw Scan Number
CURSEQ02= 0 / Current Sequence Number
STATUS02= '9: STB ' / Instrument Status Mode
FRMTIM02= 2.00 / Frametime for the scan (seconds)
APER02 = 1 / Aperture Used
FILT02 = 6 / Filter Used
GMTTIM02= '336/21: 0:14' / GMT stop time of data readout
METTIM02= '0/14:11:13' / MET stop time of data readout
SAT02 = 14.5 / %Saturation
AVESIG02= 418.3 / Average Signal ((A+B)/2)
BOS02 = -6.8 / Bright Object Sensor reading
THERM02 = -20.1 / Instrument temperature (Centigrade)
SAAFLG02= 0 / South Atlantic Anomaly status
IMCS02 = 0 / IMCS status
QUAL02 = 0 / SLDPF Quality Flag (max)
SCAN02 = 'REDUNDANT SCAN' / Prime or Redundant Scan
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SCANUM08= 18 / Raw Scan Number
CURSEQ08= 0 / Current Sequence Number
STATUS08= '9: STB ' / Instrument Status Mode
FRMTIM08= 2.00 / Frametime for the scan (seconds)
APER08 = 1 / Aperture Used
FILT08 = 6 / Filter Used
GMTTIM08= '336/21: 0:20' / GMT stop time of data readout
METTIM08= '0/14:11:19' / MET stop time of data readout
SAT08 = 14.5 / %Saturation
AVESIG08= 395.2 / Average Signal ((A+B)/2)
BOS08 = -6.8 / Bright Object Sensor reading
THERM08 = -20.1 / Instrument temperature (Centigrade)
SAAFLG08= 0 / South Atlantic Anomaly status
IMCS08 = 0 / IMCS status
QUAL08 = 0 / SLDPF Quality Flag (max)
SCAN08 = 'REDUNDANT SCAN' / Prime or Redundant Scan
SCANUM09= 19 / Raw Scan Number
CURSEQ09= 0 / Current Sequence Number
STATUS09= '0: ' / Instrument Status Mode
FRMTIM09= 0.00 / Frametime for the scan (seconds)
APER09 = 0 / Aperture Used
FILT09 = 0 / Filter Used
GMTTIM09= '0/ 0: 0: 0' / GMT stop time of data readout
METTIM09= '0/ 0: 0: 0' / MET stop time of data readout
SAT09 = 0.0 / %Saturation
AVESIG09= 0.0 / Average Signal ((A+B)/2)
BOS09 = 0.0 / Bright Object Sensor reading
THERM09 = 0.0 / Instrument temperature (Centigrade)
SAAFLG09= 0 / South Atlantic Anomaly status
IMCS09 = 0 / IMCS status
QUAL09 = 0 / SLDPF Quality Flag (max)
SCAN09 = 'FILLER SCAN' / Zero-Filled Scan
SCANUM10= 20 / Raw Scan Number
CURSEQ10= 0 / Current Sequence Number
STATUS10= '0: ' / Instrument Status Mode
FRMTIM10= 0.00 / Frametime for the scan (seconds)
APER10 = 0 / Aperture Used
FILT10 = 0 / Filter Used
GMTTIM10= '0/ 0: 0: 0' / GMT stop time of data readout
METTIM10= '0/ 0: 0: 0' / MET stop time of data readout
SAT10 = 0.0 / %Saturation
AVESIG10= 0.0 / Average Signal ((A+B)/2)
BOS10 = 0.0 / Bright Object Sensor reading
THERM10 = 0.0 / Instrument temperature (Centigrade)
SAAFLG10= 0 / South Atlantic Anomaly status
IMCS10 = 0 / IMCS status
QUAL10 = 0 / SLDPF Quality Flag (max)
SCAN10 = 'FILLER SCAN' / Zero-Filled Scan
END
7.0 File Verification and Modifications
During the NDADS ingest process several errors were discovered in the original SCAN FITS file headers as received from the WUPPE project. The NDADS staff, with the concurrence of the WUPPE project, corrected these headers prior to ingest of the data to NDADS. Changes were made to several FITS keywords ONLY. No changes were made to the data itself. The following changes were made:
* The CRVAL1 and CRVAL2 keywords were changed from whatever was in the original file to 1.0. Modifications were also made to the keyword comments to clarify the meaning of this keyword.
* The CRVAL3 keyword was set equal to the starting scan number contained in the keyword SCANUM01. Changes were also made to the comment for this keyword.
* Changes were made to the comments for the CRPIX1, CRPIX2, and CRPIX3 keywords to clarify their meaning.
During ingest SCAN files were checked to make sure the FITS file headers were consistent with the FITS file names. The keywords checked included, (where appropriate): the MET date (DAY number), Object Name, Pointing ID, and SCAN number.
8.0 Further Information
Additional information on WUPPE can be found in the WUPPE1_GENINFO.DOC file on NDADS and in the WUPPE NDADS HOLDINGS file.
For further assistance, please send mail to archive@stsci.edu or contact:
UW Space Astronomy Laboratory
Chamberlin Hall
1150 University Avenue
Madison, WI 53706
Phone (608) 263-4678
meade@sal.wisc.edu
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