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: http://www.naic.edu/~cima/fits_header_1.02.html
Дата изменения: Thu Mar 1 19:02:21 2012 Дата индексирования: Mon Oct 1 23:12:12 2012 Кодировка: Поисковые слова: mercury surface |
SIMPLE = T / File does conform to FITS standard BITPIX = 8 / Number of bits per data pixel NAXIS = 0 / Number of data axes EXTEND = T / FITS dataset do contain extensions COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365. COMMENT Contact the NASA Science Office of Standards and Technology for the COMMENT FITS Definition document #100 and other FITS information. COMMENT http://wiki.gb.nrao.edu/bin/view/Data/ COMMENT BDFITSWorkingGroupFITSSpecification COMMENT Info on CIMAFITS available at http://www.naic.edu/~cima DATE = '2005-05-25T22:38:53' / File creation date (YYYY-MM-DDThh:mm:ss UTC) TELESCOP= 'ARECIBO 305m' / Telescope name ORIGIN = 'NAIC' / Origin of data HISTORY CIMAFITS WAPP data END
XTENSION= 'BINTABLE' / Binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 1288 / Width of table in bytes NAXIS2 = 992 / Number of rows in table PCOUNT = 99388032 / Size of heap GCOUNT = 1 / One data group (required keyword) TFIELDS = 127 / Number of fields in each row EXTNAME = 'CIMAFITS' / CIMAFITS is the standard Arecibo FITS-format VERSION = 1.02 / CIMAFITS version number VER_DATE= '2005-05-25' / Date when this CIMAFITS version was installed THEAP = 84412800 / Byte offset to heap start from bintable start OBSERVER= 'Lerner ' / Observer's name PROJID = 'x108 ' / Project ID string OBSID = 'x108 ' / Observation ID string BACKEND = 'WAPP ' / Name of backend STIME = 20 / [ns] Correlator sampling interval TELESCOP= 'ARECIBO 305m' / Telescope name OBSGEO-X= 2390486.9000 / Lat=atan2(Z,sqrt(X*X+Y*Y)) OBSGEO-Y= -5564731.4400 / Long=atan2(Y,X) OBSGEO-Z= 1994720.4500 / From VLBI, courtesy T. Ghosh STARTON = 0 / Start on 0, 1, or 10 sec tick RADESYS = 'FK5 ' / Main coordinate system is always FK5 EQUINOX = 2000.0000 / Main coordinate system is always J2000 CTYPE1 = 'FREQ ' / Type of coordinate CUNIT1 = 'Hz ' / Unit of center frequency CTYPE2 = 'RA ' / RA type CUNIT2 = 'deg ' / RA unit CRPIX2 = 1 / RA doesnt change with pixel CTYPE3 = 'DEC ' / Dec type CUNIT3 = 'deg ' / Dec unit CRPIX3 = 1 / Dec doesnt change with pixel CTYPE4 = 'STOKES ' / -1=RRpolBcir -2=LLpolAcir, -5=XXpolAlin, -6=YYp CUNIT4 = ' ' / No unit CRPIX4 = 1 / Polarization doesnt change with pixel CTYPE5 = 'TIME ' / Start time on date-obs CUNIT5 = 's ' / Time unit CRPIX5 = 1 / Time doesnt change with pixel CTYPE2G = 'GLON ' / Galactic longitude type CUNIT2G = 'deg ' / Galactic longitude unit CRPIX2G = 1 / Galactic long doesnt change with pixel CTYPE3G = 'GLAT ' / Galactic latitude type CUNIT3G = 'deg ' / Galactic latitude unit CRPIX3G = 1 / Galactic lat doesnt change with pixel COMMENT Explanation of some CIMAFITS binary table columns: COMMENT REQ_RA & REQ_DEC: requested source coordinates in the requested COMMENT coordinate system given by REQ_RADESYS and REQ_EQUINOX - the names COMMENT are badly chosen since the coordinates can be galactic or AZ/ZA COMMENT CUR_ERR: current tracking error at encoder read out time COMMENT INPUT_ID: for ALFA, the eighth channel contains a copy of beam 6 COMMENT BAD_DATA: 0->good data COMMENT NIFS: 1=single pol, 2=dual pol, 4=full Stokes TTYPE1 = 'DATA ' / The actual data TFORM1 = 'PE(16384)' / Max data size TUNIT1 = ' ' / Physical unit of field TTYPE2 = 'TDIM1 ' / Dimensions of data pointed to in the heap TFORM2 = '16A ' / TUNIT2 = ' ' / TDISP2 = 'A16 ' / TTYPE3 = 'OBJECT ' / Name of source observed TFORM3 = '16A ' / TUNIT3 = ' ' / TDISP3 = 'A16 ' / TTYPE4 = 'CRVAL1 ' / Center frequency TFORM4 = '1D ' / TUNIT4 = 'Hz ' / TDISP4 = 'D13.5 ' / TTYPE5 = 'CDELT1 ' / Frequency interval TFORM5 = '1D ' / TUNIT5 = 'Hz ' / TDISP5 = 'D13.5 ' / TTYPE6 = 'CRPIX1 ' / Pixel of center frequency TFORM6 = '1D ' / TUNIT6 = ' ' / TDISP6 = 'D13.5 ' / TTYPE7 = 'CRVAL2 ' / True RA J2000 pointing this beam on sky TFORM7 = '1D ' / TUNIT7 = 'deg ' / TDISP7 = 'D13.5 ' / TTYPE8 = 'CRVAL3 ' / True DEC J2000 pointing this beam on sky TFORM8 = '1D ' / TUNIT8 = 'deg ' / TDISP8 = 'D13.5 ' / TTYPE9 = 'CRVAL4 ' / Polarization (neg -> Pol, pos -> Stokes) TFORM9 = '1D ' / TUNIT9 = ' ' / TDISP9 = 'D13.5 ' / TTYPE10 = 'CRVAL5 ' / Seconds since midnight from obsdate (UTC) TFORM10 = '1D ' / TUNIT10 = 's ' / TDISP10 = 'D13.5 ' / TTYPE11 = 'DATE-OBS' / Start of this observation (UTC) - YYYYMMDD TFORM11 = '16A ' / TUNIT11 = ' ' / TDISP11 = 'A16 ' / TTYPE12 = 'TSYS ' / Last computed Tsys - set to 1.0 if unavailable TFORM12 = '1D ' / TUNIT12 = 'K ' / TDISP12 = 'D13.5 ' / TTYPE13 = 'BANDWID ' / Overall bandwidth of spectrum TFORM13 = '1D ' / TUNIT13 = 'Hz ' / TDISP13 = 'D13.5 ' / TTYPE14 = 'RESTFRQ ' / Rest frequency for CRVAL2 and CRVAL3 TFORM14 = '1D ' / TUNIT14 = 'Hz ' / TDISP14 = 'D13.5 ' / TTYPE15 = 'RESTFRQG' / Rest frequency for CRVAL2G and CRVAL3G TFORM15 = '1D ' / TUNIT15 = 'Hz ' / TDISP15 = 'D13.5 ' / TTYPE16 = 'SPECSYS ' / Velocity frame for CRVAL2 and CRVAL3 TFORM16 = '8A ' / TUNIT16 = ' ' / TDISP16 = 'A8 ' / TTYPE17 = 'SPECSYSG' / Velocity frame for CRVAL2G and CRVAL3G TFORM17 = '8A ' / TUNIT17 = ' ' / TDISP17 = 'A8 ' / TTYPE18 = 'REQ_VEL ' / Requested velocity or z in frame SPECSYS TFORM18 = '1D ' / TUNIT18 = ' ' / TDISP18 = 'D13.5 ' / TTYPE19 = 'REQ_VEL_UNIT' / Specifies units of REQ_VEL: either m/s or Z TFORM19 = '8A ' / TUNIT19 = ' ' / TDISP19 = 'A8 ' / TTYPE20 = 'REQ_VEL_TYPE' / Velocity type for REQ_VEL TFORM20 = '8A ' / TUNIT20 = ' ' / TDISP20 = 'A8 ' / TTYPE21 = 'MJD-OBS ' / Modified Julian day number at exposure start TFORM21 = '1D ' / TUNIT21 = 'd ' / TDISP21 = 'D13.5 ' / TTYPE22 = 'LST ' / Local mean sidereal time TFORM22 = '1D ' / TUNIT22 = 's ' / TDISP22 = 'D13.5 ' / TTYPE23 = 'EXPOSURE' / Exposure time of current subscan (dump) TFORM23 = '1D ' / TUNIT23 = 's ' / TDISP23 = 'D13.5 ' / TTYPE24 = 'REQ_RA ' / Requested long (usually RA) in REQ_RADESYS TFORM24 = '1D ' / TUNIT24 = 'deg ' / TDISP24 = 'D13.5 ' / TTYPE25 = 'REQ_DEC ' / Requested lat (usually DEC) in REQ_RADESYS TFORM25 = '1D ' / TUNIT25 = 'deg ' / TDISP25 = 'D13.5 ' / TTYPE26 = 'REQ_RADESYS' / Coordinate system used for REQ_RA and REQ_DEC TFORM26 = '8A ' / TUNIT26 = ' ' / TDISP26 = 'A8 ' / TTYPE27 = 'REQ_EQUINOX' / Epoch of requested position REQ_RA and REQ_DEC TFORM27 = '1D ' / TUNIT27 = ' ' / TDISP27 = 'D13.5 ' / TTYPE28 = 'REQ_RAJ ' / Requested RA J2000 antenna pointing TFORM28 = '1D ' / TUNIT28 = 'deg ' / TDISP28 = 'D13.5 ' / TTYPE29 = 'REQ_DECJ' / Requested Dec J2000 antenna pointing TFORM29 = '1D ' / TUNIT29 = 'deg ' / TDISP29 = 'D13.5 ' / TTYPE30 = 'ENC_TIME' / Time when encoders were read out (UTC) TFORM30 = '1D ' / TUNIT30 = 's ' / TDISP30 = 'D13.5 ' / TTYPE31 = 'ENC_AZIMUTH' / Azimuth encoder read-out at ENC_TIME TFORM31 = '1D ' / TUNIT31 = 'deg ' / TDISP31 = 'D13.5 ' / TTYPE32 = 'ENC_ELEVATIO' / Elevation encoder read-out at ENC_TIME TFORM32 = '1D ' / TUNIT32 = 'deg ' / TDISP32 = 'D13.5 ' / TTYPE33 = 'ENC_ALTEL' / Elevation encoder of other carriage house TFORM33 = '1D ' / TUNIT33 = 'deg ' / TDISP33 = 'D13.5 ' / TTYPE34 = 'OFFC1 ' / Engineering offset TFORM34 = '1D ' / TUNIT34 = 'rad ' / TDISP34 = 'D13.5 ' / TTYPE35 = 'OFFC2 ' / Engineering offset TFORM35 = '1D ' / TUNIT35 = 'rad ' / TDISP35 = 'D13.5 ' / TTYPE36 = 'OFF_TIME' / Seconds from midnight (UTC) TFORM36 = '1D ' / TUNIT36 = 's ' / TDISP36 = 'D13.5 ' / TTYPE37 = 'RATE_C1 ' / Rate of change offset (eng) TFORM37 = '1D ' / TUNIT37 = 'deg/s ' / TDISP37 = 'D13.5 ' / TTYPE38 = 'RATE_C2 ' / Rate of change offset (eng) TFORM38 = '1D ' / TUNIT38 = 'deg/s ' / TDISP38 = 'D13.5 ' / TTYPE39 = 'OFF_CS ' / Coordinate system of offs TFORM39 = '1J ' / TUNIT39 = ' ' / TDISP39 = 'I9 ' / TTYPE40 = 'RATE_CS ' / Coordinate system of rates TFORM40 = '1J ' / TUNIT40 = ' ' / TDISP40 = 'I9 ' / TTYPE41 = 'RATE_DUR' / How long has rate been applied TFORM41 = '1D ' / TUNIT41 = 's ' / TDISP41 = 'D13.5 ' / TTYPE42 = 'CUR_ERR ' / Actual great circle tracking error TFORM42 = '1D ' / TUNIT42 = 'arcsec ' / TDISP42 = 'D13.5 ' / TTYPE43 = 'ALLOWED_ERR' / Maximum allowed tracking error TFORM43 = '1D ' / TUNIT43 = 'arcsec ' / TDISP43 = 'D13.5 ' / TTYPE44 = 'AZ_ERR ' / Azimuth tracking error (actual-requested) TFORM44 = '1D ' / TUNIT44 = 'arcsec ' / TDISP44 = 'D13.5 ' / TTYPE45 = 'EL_ERR ' / Elevation tracking error (actual-requested) TFORM45 = '1D ' / TUNIT45 = 'arcsec ' / TDISP45 = 'D13.5 ' / TTYPE46 = 'MODEL_OFFAZ' / Pointing model offset AZ TFORM46 = '1D ' / TUNIT46 = 'deg ' / TDISP46 = 'D13.5 ' / TTYPE47 = 'MODEL_OFFZA' / Pointing model offset ZA TFORM47 = '1D ' / TUNIT47 = 'deg ' / TDISP47 = 'D13.5 ' / TTYPE48 = 'BEAM_OFFAZ' / ALFA unrotated offset AZ TFORM48 = '1D ' / TUNIT48 = 'deg ' / TDISP48 = 'D13.5 ' / TTYPE49 = 'BEAM_OFFZA' / ALFA unrotated offset ZA TFORM49 = '1D ' / TUNIT49 = 'deg ' / TDISP49 = 'D13.5 ' / TTYPE50 = 'USER_OFFAZ' / User selected pointing offset AZ (great circle) TFORM50 = '1D ' / TUNIT50 = 'deg ' / TDISP50 = 'D13.5 ' / TTYPE51 = 'USER_OFFZA' / User selected pointing offset ZA TFORM51 = '1D ' / TUNIT51 = 'deg ' / TDISP51 = 'D13.5 ' / TTYPE52 = 'RFEED_OFFAZ' / Rotated offset this beam AZ TFORM52 = '1D ' / TUNIT52 = 'deg ' / TDISP52 = 'D13.5 ' / TTYPE53 = 'RFEED_OFFZA' / Rotated offset this beam ZA TFORM53 = '1D ' / TUNIT53 = 'deg ' / TDISP53 = 'D13.5 ' / TTYPE54 = 'PRFEED_OFFAZ' / Offset to center prfeed beam AZ TFORM54 = '1D ' / TUNIT54 = 'deg ' / TDISP54 = 'D13.5 ' / TTYPE55 = 'PRFEED_OFFZA' / Offset to center prfeed beam ZA TFORM55 = '1D ' / TUNIT55 = 'deg ' / TDISP55 = 'D13.5 ' / TTYPE56 = 'BEAM_OFFRAJ' / Total RA offset to this beam TFORM56 = '1D ' / TUNIT56 = 'deg ' / TDISP56 = 'D13.5 ' / TTYPE57 = 'BEAM_OFFDECJ' / Total DEC offset to this beam TFORM57 = '1D ' / TUNIT57 = 'deg ' / TDISP57 = 'D13.5 ' / TTYPE58 = 'AZIMUTH ' / True AZ pointing this beam on sky TFORM58 = '1D ' / TUNIT58 = 'deg ' / TDISP58 = 'D13.5 ' / TTYPE59 = 'ELEVATIO' / True EL pointing this beam on sky TFORM59 = '1D ' / TUNIT59 = 'deg ' / TDISP59 = 'D13.5 ' / TTYPE60 = 'CRVAL2G ' / True galactic l pointing this beam on sky TFORM60 = '1D ' / TUNIT60 = 'deg ' / TDISP60 = 'D13.5 ' / TTYPE61 = 'CRVAL3G ' / True galactic b pointing this beam on sky TFORM61 = '1D ' / TUNIT61 = 'deg ' / TDISP61 = 'D13.5 ' / TTYPE62 = 'OFF_RA ' / True RA J2000 offset to commanded map center TFORM62 = '1D ' / TUNIT62 = 'deg ' / TDISP62 = 'D13.5 ' / TTYPE63 = 'OFF_DEC ' / True DEC J2000 offset to commanded map center TFORM63 = '1D ' / TUNIT63 = 'deg ' / TDISP63 = 'D13.5 ' / TTYPE64 = 'OFF_AZ ' / True AZ offset to commanded map center TFORM64 = '1D ' / TUNIT64 = 'deg ' / TDISP64 = 'D13.5 ' / TTYPE65 = 'OFF_ZA ' / True ZA offset to commanded map center TFORM65 = '1D ' / TUNIT65 = 'deg ' / TDISP65 = 'D13.5 ' / TTYPE66 = 'ALFA_ANG' / ALFA rotation angle TFORM66 = '1D ' / TUNIT66 = 'deg ' / TDISP66 = 'D13.5 ' / TTYPE67 = 'PARA_ANG' / Parallactic angle TFORM67 = '1D ' / TUNIT67 = 'deg ' / TDISP67 = 'D13.5 ' / TTYPE68 = 'VEL_BARY' / Projected barycentric velocity (incl. VEL_GEO) TFORM68 = '1D ' / TUNIT68 = 'm/s ' / TDISP68 = 'D13.5 ' / TTYPE69 = 'VEL_GEO ' / Projected geocentric velocity TFORM69 = '1D ' / TUNIT69 = 'm/s ' / TDISP69 = 'D13.5 ' / TTYPE70 = 'FRONTEND' / Receiver name TFORM70 = '8A ' / TUNIT70 = ' ' / TDISP70 = 'A8 ' / TTYPE71 = 'BACKENDMODE' / Backend mode description TFORM71 = '24A ' / TUNIT71 = ' ' / TDISP71 = 'A24 ' / TTYPE72 = 'CALTYPE ' / Calibration type TFORM72 = '8A ' / TUNIT72 = ' ' / TDISP72 = 'A8 ' / TTYPE73 = 'OBSMODE ' / Name of observation pattern (e.g. ONOFF) TFORM73 = '8A ' / TUNIT73 = ' ' / TDISP73 = 'A8 ' / TTYPE74 = 'SCANTYPE' / Type of scan (as part of pattern - e.g. ON OFF) TFORM74 = '8A ' / TUNIT74 = ' ' / TDISP74 = 'A8 ' / TTYPE75 = 'PATTERN_ID' / Unique number for observation pattern YDDDnnnnn TFORM75 = '1J ' / TUNIT75 = ' ' / TDISP75 = 'I9 ' / TTYPE76 = 'SCAN_ID ' / Unique number for scan YDDDnnnnn TFORM76 = '1J ' / TUNIT76 = ' ' / TDISP76 = 'I9 ' / TTYPE77 = 'SUBSCAN ' / Sequential number of current subscan (dump) TFORM77 = '1J ' / TUNIT77 = ' ' / TDISP77 = 'I8 ' / TTYPE78 = 'TOTAL_SUBSCANS' / Total number of subscans (dumps) in scan TFORM78 = '1J ' / TUNIT78 = ' ' / TDISP78 = 'I8 ' / TTYPE79 = 'LAGS_IN ' / Number of lags - same as bytes of data/4 TFORM79 = '1J ' / TUNIT79 = ' ' / TDISP79 = 'I8 ' / TTYPE80 = 'BAD_DATA' / 0->good data <>0->problem (see COMMENT) TFORM80 = '1J ' / TUNIT80 = ' ' / TDISP80 = 'I8 ' / TTYPE81 = 'PLAT_POWER' / Power from platform meter TFORM81 = '1D ' / TUNIT81 = ' ' / TDISP81 = 'D13.5 ' / TTYPE82 = 'CNTRL_POWER' / Power from control room meter TFORM82 = '1D ' / TUNIT82 = ' ' / TDISP82 = 'D13.5 ' / TTYPE83 = 'SYN1 ' / Platform synthesizer TFORM83 = '1D ' / TUNIT83 = 'Hz ' / TDISP83 = 'D13.5 ' / TTYPE84 = 'SYNFRQ ' / Control room synthesizers TFORM84 = '4D ' / TUNIT84 = 'Hz ' / TDISP84 = 'D13.5 ' / TTYPE85 = 'TOT_POWER' / Scaled power in zero-lag TFORM85 = '1D ' / TUNIT85 = ' ' / TDISP85 = 'D13.5 ' / TTYPE86 = 'WAPPMASK' / Which other WAPPs or ALFAs enabled TFORM86 = '1J ' / TUNIT86 = ' ' / TDISP86 = 'I8 ' / TTYPE87 = 'NTCAL ' / Number of entries in TCAL_FRQ and TCAL_VAL TFORM87 = '1J ' / TUNIT87 = ' ' / TDISP87 = 'I8 ' / TTYPE88 = 'TCAL_FRQ' / Frequencies for Tcal-values in TCAL_VAL TFORM88 = '32D ' / TUNIT88 = 'Hz ' / TDISP88 = 'D13.5 ' / TTYPE89 = 'TCAL_VAL' / Tcal-values for frequencies in TCAL_FRQ TFORM89 = '32D ' / TUNIT89 = 'K ' / TDISP89 = 'D13.5 ' / TTYPE90 = 'PRFEED ' / ALFA feed centered on this scan TFORM90 = '1B ' / TUNIT90 = ' ' / TDISP90 = 'B1 ' / TTYPE91 = 'NIFS ' / Number of products for this WAPP/ALFA beam TFORM91 = '1B ' / TUNIT91 = ' ' / TDISP91 = 'B1 ' / TTYPE92 = 'IFVAL ' / Which polarization: 0-1 or 0-3 for Stokes TFORM92 = '1B ' / TUNIT92 = ' ' / TDISP92 = 'B1 ' / TTYPE93 = 'INPUT_ID' / WAPP number 0-3 or 0-7 for ALFA (7=copy of 6) TFORM93 = '1B ' / TUNIT93 = ' ' / TDISP93 = 'B1 ' / TTYPE94 = 'UPPERSB ' / True if spectrum flipped TFORM94 = '1B ' / TUNIT94 = ' ' / TDISP94 = 'B1 ' / TTYPE95 = 'ATTN_COR' / Correlator attenuator: 0-15 dB TFORM95 = '1B ' / TUNIT95 = ' ' / TDISP95 = 'B1 ' / TTYPE96 = 'MASTER ' / 0=Gregorian dome 1=Carriage house TFORM96 = '1B ' / TUNIT96 = ' ' / TDISP96 = 'B1 ' / TTYPE97 = 'ONSOURCE' / True if on-source at ENC_TIME TFORM97 = '1B ' / TUNIT97 = ' ' / TDISP97 = 'B1 ' / TTYPE98 = 'BLANKING' / Blanking turned on TFORM98 = '1B ' / TUNIT98 = ' ' / TDISP98 = 'B1 ' / TTYPE99 = 'LBWHYB ' / LBandWide Hybrid is in (for circular pol) TFORM99 = '1B ' / TUNIT99 = ' ' / TDISP99 = 'B1 ' / TTYPE100= 'SHCL ' / True if receiver shutter closed TFORM100= '1B ' / TUNIT100= ' ' / TDISP100= 'B1 ' / TTYPE101= 'SBSHCL ' / True if S-band receiver shutter closed TFORM101= '1B ' / TUNIT101= ' ' / TDISP101= 'B1 ' / TTYPE102= 'RFNUM ' / Platform position of the receiver selector TFORM102= '1B ' / TUNIT102= ' ' / TDISP102= 'B1 ' / TTYPE103= 'CALRCVMUX' / Platform cal selector TFORM103= '1B ' / TUNIT103= ' ' / TDISP103= 'B1 ' / TTYPE104= 'ZMNORMAL' / Platform transfer switch to reverse channels, t TFORM104= '1B ' / TUNIT104= ' ' / TDISP104= 'B1 ' / TTYPE105= 'RFATTN ' / Platform attenuator positions TFORM105= '2B ' / TUNIT105= ' ' / TDISP105= 'B1 ' / TTYPE106= 'IFNUM ' / Platform IF selector, 1/300 2/750, 3/1500, 4/10 TFORM106= '1B ' / TUNIT106= ' ' / TDISP106= 'B1 ' / TTYPE107= 'IFATTN ' / Platform IF attenuator positions TFORM107= '2B ' / TUNIT107= ' ' / TDISP107= 'B1 ' / TTYPE108= 'FIBER ' / True if platform fiber chosen (usually true) TFORM108= '1B ' / TUNIT108= ' ' / TDISP108= 'B1 ' / TTYPE109= 'AC2SW ' / Platform AC power to various instruments etc. TFORM109= '1B ' / TUNIT109= ' ' / TDISP109= 'B1 ' / TTYPE110= 'PHBSIG ' / Platform converter combiner signal ph adjust TFORM110= '1B ' / TUNIT110= ' ' / TDISP110= 'B1 ' / TTYPE111= 'HYBRID ' / Platform converter combiner hybrid TFORM111= '1B ' / TUNIT111= ' ' / TDISP111= 'B1 ' / TTYPE112= 'PHBLO ' / Platform converter combiner LO phase adjust TFORM112= '1B ' / TUNIT112= ' ' / TDISP112= 'B1 ' / TTYPE113= 'XFNORMAL' / Control room transfer switch true = default TFORM113= '1B ' / TUNIT113= ' ' / TDISP113= 'B1 ' / TTYPE114= 'NOISE ' / Control room noise on TFORM114= '1B ' / TUNIT114= ' ' / TDISP114= 'B1 ' / TTYPE115= 'AMPGAIN ' / Gain of control room amplifiers TFORM115= '2B ' / TUNIT115= ' ' / TDISP115= 'B1 ' / TTYPE116= 'INPFRQ ' / Control room input distributor position TFORM116= '1B ' / TUNIT116= ' ' / TDISP116= 'B1 ' / TTYPE117= 'MIXER ' / Control room mixer source switches TFORM117= '4B ' / TUNIT117= ' ' / TDISP117= 'B1 ' / TTYPE118= 'VLBAINP ' / Control room VLBA input switch position TFORM118= '1B ' / TUNIT118= ' ' / TDISP118= 'B1 ' / TTYPE119= 'AMPINP ' / Control room amplifier input source switches TFORM119= '4B ' / TUNIT119= ' ' / TDISP119= 'B1 ' / TTYPE120= 'EXTINP ' / Control room external input selector switches TFORM120= '4B ' / TUNIT120= ' ' / TDISP120= 'B1 ' / TTYPE121= 'SYNDEST ' / Control room synthesizer destinations TFORM121= '4B ' / TUNIT121= ' ' / TDISP121= 'B1 ' / TTYPE122= 'CALSRC ' / Control room cal source bit TFORM122= '1B ' / TUNIT122= ' ' / TDISP122= 'B1 ' / TTYPE123= 'CAL ' / Is cal bit turned on TFORM123= '1B ' / TUNIT123= ' ' / TDISP123= 'B1 ' / TTYPE124= 'VIS30MHZ' / Control room greg 1 ch 0 TFORM124= '1B ' / TUNIT124= ' ' / TDISP124= 'B1 ' / TTYPE125= 'PWRMET ' / Control room power meter input switch TFORM125= '1B ' / TUNIT125= ' ' / TDISP125= 'B1 ' / TTYPE126= 'BLANK430' / Control room 430 blanking on TFORM126= '1B ' / TUNIT126= ' ' / TDISP126= 'B1 ' / TTYPE127= 'FILL ' / Round up header to even 8 bytes TFORM127= '4B ' / TUNIT127= ' ' / TDISP127= 'B1 ' / END
struct FITS_HEADER {
struct ARRAY_DES datapointer; /* x x Pointer to the data in the heap */
char tdim1[16]; /* x A16 Dimensions of data pointed to in the heap */
char object[16]; /* x A16 Name of source observed */
double crval1; /* Hz D13.5 Center frequency */
double cdelt1; /* Hz D13.5 Frequency interval */
double crpix1; /* x D13.5 Pixel of center frequency */
double crval2; /* deg D13.5 True RA J2000 pointing this beam on sky */
double crval3; /* deg D13.5 True DEC J2000 pointing this beam on sky */
double crval4; /* x D13.5 Polarization (neg -> Pol, pos -> Stokes) */
double crval5; /* s D13.5 Seconds since midnight from obsdate (UTC) */
char datexxobs[16]; /* x A16 Start of this observation (UTC) - YYYYMMDD */
double tsys; /* K D13.5 Last computed Tsys - set to 1.0 if unavailable */
double bandwid; /* Hz D13.5 Overall bandwidth of spectrum */
double restfrq; /* Hz D13.5 Rest frequency for CRVAL2 and CRVAL3 */
double restfrqg; /* Hz D13.5 Rest frequency for CRVAL2G and CRVAL3G */
char specsys[8]; /* x A8 Velocity frame for CRVAL2 and CRVAL3 */
char specsysg[8]; /* x A8 Velocity frame for CRVAL2G and CRVAL3G */
double req_vel; /* x D13.5 Requested velocity or z in frame SPECSYS */
char req_vel_unit[8]; /* x A8 Specifies units of REQ_VEL: either m/s or Z */
char req_vel_type[8]; /* x A8 Velocity type for REQ_VEL */
double mjdxxobs; /* d D13.5 Modified Julian day number at exposure start */
double lst; /* s D13.5 Local mean sidereal time */
double exposure; /* s D13.5 Exposure time of current subscan (dump) */
double req_ra; /* deg D13.5 Requested long (usually RA) in REQ_RADESYS */
double req_dec; /* deg D13.5 Requested lat (usually DEC) in REQ_RADESYS */
char req_radesys[8]; /* x A8 Coordinate system used for REQ_RA and REQ_DEC */
double req_equinox; /* x D13.5 Epoch of requested position REQ_RA and REQ_DEC */
double req_raj; /* deg D13.5 Requested RA J2000 antenna pointing */
double req_decj; /* deg D13.5 Requested Dec J2000 antenna pointing */
double enc_time; /* s D13.5 Time when encoders were read out (UTC) */
double enc_azimuth; /* deg D13.5 Azimuth encoder read-out at ENC_TIME */
double enc_elevatio; /* deg D13.5 Elevation encoder read-out at ENC_TIME */
double enc_altel; /* deg D13.5 Elevation encoder of other carriage house */
double offc1; /* rad D13.5 Engineering offset */
double offc2; /* rad D13.5 Engineering offset */
double off_time; /* s D13.5 Seconds from midnight (UTC) */
double rate_c1; /* deg/s D13.5 Rate of change offset (eng) */
double rate_c2; /* deg/s D13.5 Rate of change offset (eng) */
int off_cs; /* x I9 Coordinate system of offs */
int rate_cs; /* x I9 Coordinate system of rates */
double rate_dur; /* s D13.5 How long has rate been applied */
double cur_err; /* arcsec D13.5 Actual great circle tracking error */
double allowed_err; /* arcsec D13.5 Maximum allowed tracking error */
double az_err; /* arcsec D13.5 Azimuth tracking error (actual-requested) */
double el_err; /* arcsec D13.5 Elevation tracking error (actual-requested) */
double model_offaz; /* deg D13.5 Pointing model offset AZ */
double model_offza; /* deg D13.5 Pointing model offset ZA */
double beam_offaz; /* deg D13.5 ALFA unrotated offset AZ */
double beam_offza; /* deg D13.5 ALFA unrotated offset ZA */
double user_offaz; /* deg D13.5 User selected pointing offset AZ (great circle) */
double user_offza; /* deg D13.5 User selected pointing offset ZA */
double rfeed_offaz; /* deg D13.5 Rotated offset this beam AZ */
double rfeed_offza; /* deg D13.5 Rotated offset this beam ZA */
double prfeed_offaz; /* deg D13.5 Offset to center prfeed beam AZ */
double prfeed_offza; /* deg D13.5 Offset to center prfeed beam ZA */
double beam_offraj; /* deg D13.5 Total RA offset to this beam */
double beam_offdecj; /* deg D13.5 Total DEC offset to this beam */
double azimuth; /* deg D13.5 True AZ pointing this beam on sky */
double elevatio; /* deg D13.5 True EL pointing this beam on sky */
double crval2g; /* deg D13.5 True galactic l pointing this beam on sky */
double crval3g; /* deg D13.5 True galactic b pointing this beam on sky */
double off_ra; /* deg D13.5 True RA J2000 offset to commanded map center */
double off_dec; /* deg D13.5 True DEC J2000 offset to commanded map center */
double off_az; /* deg D13.5 True AZ offset to commanded map center */
double off_za; /* deg D13.5 True ZA offset to commanded map center */
double alfa_ang; /* deg D13.5 ALFA rotation angle */
double para_ang; /* deg D13.5 Parallactic angle */
double vel_bary; /* m/s D13.5 Projected barycentric velocity (incl. VEL_GEO) */
double vel_geo; /* m/s D13.5 Projected geocentric velocity */
char frontend[8]; /* x A8 Receiver name */
char backendmode[24]; /* x A24 Backend mode description */
char caltype[8]; /* x A8 Calibration type */
char obsmode[8]; /* x A8 Name of observation pattern (e.g. ONOFF) */
char scantype[8]; /* x A8 Type of scan (as part of pattern - e.g. ON OFF) */
int pattern_id; /* x I9 Unique number for observation pattern YDDDnnnnn */
int scan_id; /* x I9 Unique number for scan YDDDnnnnn */
int subscan; /* x I8 Sequential number of current subscan (dump) */
int total_subscans; /* x I8 Total number of subscans (dumps) in scan */
int lags_in; /* x I8 Number of lags - same as bytes of data/4 */
unsigned int bad_data; /* x I8 0->good data <>0->problem (see COMMENT) */
double plat_power; /* x D13.5 Power from platform meter */
double cntrl_power; /* x D13.5 Power from control room meter */
double syn1; /* Hz D13.5 Platform synthesizer */
double synfrq[4]; /* Hz D13.5 Control room synthesizers */
double tot_power; /* x D13.5 Scaled power in zero-lag */
unsigned int wappmask; /* x I8 Which other WAPPs or ALFAs enabled */
int ntcal; /* x I8 Number of entries in TCAL_FRQ and TCAL_VAL */
double tcal_frq[32]; /* Hz D13.5 Frequencies for Tcal-values in TCAL_VAL */
double tcal_val[32]; /* K D13.5 Tcal-values for frequencies in TCAL_FRQ */
unsigned char prfeed; /* x B1 ALFA feed centered on this scan */
unsigned char nifs; /* x B1 Number of products for this WAPP/ALFA beam */
unsigned char ifval; /* x B1 Which polarization: 0-1 or 0-3 for Stokes */
unsigned char input_id; /* x B1 WAPP number 0-3 or 0-7 for ALFA (7=copy of 6) */
unsigned char uppersb; /* x B1 True if spectrum flipped */
unsigned char attn_cor; /* x B1 Correlator attenuator: 0-15 dB */
unsigned char master; /* x B1 0=Gregorian dome 1=Carriage house */
unsigned char onsource; /* x B1 True if on-source at ENC_TIME */
unsigned char blanking; /* x B1 Blanking turned on */
unsigned char lbwhyb; /* x B1 LBandWide Hybrid is in (for circular pol) */
unsigned char shcl; /* x B1 True if receiver shutter closed */
unsigned char sbshcl; /* x B1 True if S-band receiver shutter closed */
unsigned char rfnum; /* x B1 Platform position of the receiver selector */
unsigned char calrcvmux; /* x B1 Platform cal selector */
unsigned char zmnormal; /* x B1 Platform transfer switch to reverse channels, true normal */
unsigned char rfattn[2]; /* x B1 Platform attenuator positions */
unsigned char ifnum; /* x B1 Platform IF selector, 1/300 2/750, 3/1500, 4/10GHz1500, 5-thru */
unsigned char ifattn[2]; /* x B1 Platform IF attenuator positions */
unsigned char fiber; /* x B1 True if platform fiber chosen (usually true) */
unsigned char ac2sw; /* x B1 Platform AC power to various instruments etc. */
unsigned char phbsig; /* x B1 Platform converter combiner signal ph adjust */
unsigned char hybrid; /* x B1 Platform converter combiner hybrid */
unsigned char phblo; /* x B1 Platform converter combiner LO phase adjust */
unsigned char xfnormal; /* x B1 Control room transfer switch true = default */
unsigned char noise; /* x B1 Control room noise on */
unsigned char ampgain[2]; /* x B1 Gain of control room amplifiers */
unsigned char inpfrq; /* x B1 Control room input distributor position */
unsigned char mixer[4]; /* x B1 Control room mixer source switches */
unsigned char vlbainp; /* x B1 Control room VLBA input switch position */
unsigned char ampinp[4]; /* x B1 Control room amplifier input source switches */
unsigned char extinp[4]; /* x B1 Control room external input selector switches */
unsigned char syndest[4]; /* x B1 Control room synthesizer destinations */
unsigned char calsrc; /* x B1 Control room cal source bit */
unsigned char cal; /* x B1 Is cal bit turned on */
unsigned char vis30mhz; /* x B1 Control room greg 1 ch 0 */
unsigned char pwrmet; /* x B1 Control room power meter input switch */
unsigned char blank430; /* x B1 Control room 430 blanking on */
unsigned char fill[4]; /* x B1 Round up header to even 8 bytes */
};