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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.

o Caution to Users The WUPPE level 0 spectrometer data should be used with caution. There are several known problems with the data that were dealt with in the data reduction procedure. Bad scans were identified and not used. There were randomly occuring telemetry errors in the data stream. The data could be trashed completely, could have negative values and the low byte could get stuck at 255. There were also Analog/Digital errors which resulted in dropped bits. The redundant scan (when it existed) was used to help identify and fix the bad pixels.

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                       
     .
     .
     .
 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:

Ms. Marilyn Meade
UW Space Astronomy Laboratory
Chamberlin Hall
1150 University Avenue
Madison, WI 53706
Phone (608) 263-4678
meade@sal.wisc.edu
The information on this page came from the WUPPE project via the Astrophysics Data Center at Goddard Space Flight Center.