	      Specpr format, version 2.								    		  Specpr format, version 3.
												    
Records are fixed format, 1536 bytes/record.							    Records are fixed format, 2048 bytes/record.
Record number counting starts at 0, data starts at record 1 (byte 1537 in the file)		    Record number counting starts at 0, data starts at record 1 (byte 2049 in the file)
												    
Record 0 contains:										    Record 0 contains:
SPECPR_FS=2.0											    SPECPR_FS=3.0
RECORD_BYTES=1536										    RECORD_BYTES=2048
LABEL_RECORDS=1											    LABEL_RECORDS=1
												    
Binary data are in IEEE format real numbers and non-byte swapped				    Binary data are in intel format
    integers (compatible with all Sun Microsystems, and Hewlett					    	integers (compatible with all Sun Microsystems, and Hewlett
    Packard workstations (Intel and some DEC machines are byte					    	Packard workstations (Intel and some DEC machines are byte
    swapped relative to Suns and HPs).								    	swapped relative to Suns and HPs).
												    
Each record may contain different information according to the following scheme.		    Each record may contain different information according to the following scheme.
												    
		   SPECtrum Processing Routines							    		       SPECtrum Processing Routines
			    Data Format								    				Data Format
			      3/4/88								    				  3/4/88
												    
												    
								      Length			    									  Length
Variable		  Description				      (bytes)			    Variable		      Description				  (bytes)
------------------------------------------------------------------------------			    ------------------------------------------------------------------------------
icflag		32 one-bit flags:					  4			    icflag	    32 one-bit flags:					      4
		(low bit = 0, high bit = 31)							    		    (low bit = 0, high bit = 31)
		bit 00 continuation data flag							    		    bit 00 continuation data flag
			=0 first record of a spectrum consists of:				    			    =0 first record of a spectrum consists of:
				header then 256 data channels					    				    header then 256 data channels
			=1 continuation data record consisting of:				    			    =1 continuation data record consisting of:
				bit flags followed by 1532 bytes of				    				    bit flags followed by 1532 bytes of
				real data (bit 1=0) (383 channels)				    				    real data (bit 1=0) (383 channels)
				or 1532 bytes of text (bit 1=1).				    				    or 1532 bytes of text (bit 1=1).
				A maximum of 12 continuation records				    				    A maximum of 12 continuation records
				are allowed for a total of 4852					    				    are allowed for a total of 4852
				channels (limited by arrays of 4864)				    				    channels (limited by arrays of 4864)
				or 19860 characters of text (bit 1=1).				    				    or 19860 characters of text (bit 1=1).
		bit 01 text/data flag:								    		    bit 01 text/data flag:
		       =0 the data in the array "data" is data					    			   =0 the data in the array "data" is data
		       =1 the data in the array "data" is ASCII text				    			   =1 the data in the array "data" is ASCII text
				as is most of the header info.					    				    as is most of the header info.
		bit 02 flag to indicate whether or not the data for				    		    bit 02 flag to indicate whether or not the data for
		       the error bar (1 sigma standard deviation of				    			   the error bar (1 sigma standard deviation of
		       the mean) is in the next record set.					    			   the mean) is in the next record set.
		       =0: no errors, =1: errors in next record set.				    			   =0: no errors, =1: errors in next record set.
		bit 03 RA, Dec / Long., Lat flag:						    		    bit 03 RA, Dec / Long., Lat flag:
		       =0 the array "ira" and "idec" corresponds to				    			   =0 the array "ira" and "idec" corresponds to
			  the right ascension and declination of an				    			      the right ascension and declination of an
			  astronomical object.							    			      astronomical object.
		       =1 the array "ira" and "idec" correspond to				    			   =1 the array "ira" and "idec" correspond to
			  the longitude and latitude of a spot on a				    			      the longitude and latitude of a spot on a
			  planetary surface.							    			      planetary surface.
		bit 04 variable iscta universal time/civil time flag				    		    bit 04 variable iscta universal time/civil time flag
		       =0 cta is civil time							    			   =0 cta is civil time
		       =1 cta is universal time							    			   =1 cta is universal time
		bit 05 variable isctb universal time/civil time flag				    		    bit 05 variable isctb universal time/civil time flag
		       =0 ctb is civil time							    			   =0 ctb is civil time
		       =1 ctb is universal time							    			   =1 ctb is universal time
		bit 06 unused									    		    bit 06 unused
		bit 07 unused									    		    bit 07 unused
		bit 08 unused									    		    bit 08 unused
		bit 09 unused									    		    bit 09 unused
		bit 10 unused									    		    bit 10 unused
		bit 11 unused									    		    bit 11 unused
		bit 12 unused									    		    bit 12 unused
		bit 13 unused									    		    bit 13 unused
		bit 14 unused									    		    bit 14 unused
		bit 15 unused									    		    bit 15 unused
		bit 16 unused									    		    bit 16 unused
		bit 17 unused									    		    bit 17 unused
		bit 18 unused									    		    bit 18 unused
		bit 19 unused									    		    bit 19 unused
		bit 20 unused									    		    bit 20 unused
		bit 21 unused									    		    bit 21 unused
		bit 22 unused									    		    bit 22 unused
		bit 23 unused									    		    bit 23 unused
		bit 24 unused									    		    bit 24 unused
		bit 25 unused									    		    bit 25 unused
		bit 26 unused									    		    bit 26 unused
		bit 27 unused									    		    bit 27 unused
		bit 28 unused									    		    bit 28 unused
		bit 29 unused									    		    bit 29 unused
		bit 30 unused									    		    bit 30 unused
		bit 31 unused									    		    bit 31 unused
		bit 32 unused									    		    bit 32 unused
												    
*************** case 1: bit 00 = 0, bit 01 = 0 ****************					    *************** case 1: bit 00 = 0, bit 01 = 0 ****************
												    
icflag		Bit flags: 32 bits, see above.				  4			    icflag	    Bit flags: 32 bits, see above.			      4
												    
ititl		40 character title which describes the			 40			    ititl	    40 character title which describes the		     40
		data (ASCII, character*40).							    		    data (ASCII, character*40).
												    
usernm		The name of the user that created the data record	  8			    usernm	    The name of the user that created the data record	      8
		(ASCII, character*8).								    		    (ASCII, character*8).
												    
iscta		Civil or Universal time when data was			  4			    iscta	    Civil or Universal time when data was		      4
		last processed (integer*4 in scaled seconds).					    		    last processed (integer*4 in scaled seconds).
		Scaled by 24000.  See flag #04.							    		    Scaled by 24000.  See flag #04.
												    
isctb		Civil or Universal time at the start of			  4			    isctb	    Civil or Universal time at the start of		      4
		the spectral run (integer*4 in scaled seconds).					    		    the spectral run (integer*4 in scaled seconds).
		Scaled by 24000. See flag #05.							    		    Scaled by 24000. See flag #05.
												    
jdatea		Date when data was last processed			  4			    jdatea	    Date when data was last processed			      4
		Stored as integer*4 Julian Day number *10					    		    Stored as integer*4 Julian Day number *10
												    
jdateb		Date when the spectral run began			  4			    jdateb	    Date when the spectral run began			      4
		Stored as integer*4 Julian Day number *10					    		    Stored as integer*4 Julian Day number *10
												    
istb		Siderial time when the spectral run started.		  4			    istb	    Siderial time when the spectral run started.	      4
		(integer*4 in scaled seconds).							    		    (integer*4 in scaled seconds).
		Scaled by 24000. See flag #05.							    		    Scaled by 24000. See flag #05.
												    
isra		Right ascension coordinates of an astronomical		  4			    isra	    Right ascension coordinates of an astronomical	      4
		object, or longitude on a planetary surface					    		    object, or longitude on a planetary surface
		(integer*4 numbers in seconds *1000)						    		    (integer*4 numbers in seconds *1000)
		(RA in RA seconds, Longitude in arc-seconds)					    		    (RA in RA seconds, Longitude in arc-seconds)
		See flag #06.									    		    See flag #06.
												    
isdec		Declination coordinates of an astronomical		  4			    isdec	    Declination coordinates of an astronomical		      4
		object, or latitude on a planetary						    		    object, or latitude on a planetary
		surface (integer*4 number in arc-seconds *1000).				    		    surface (integer*4 number in arc-seconds *1000).
		See flag #06.									    		    See flag #06.
												    
itchan		Total number of channels in the spectrum		  4			    itchan	    Total number of channels in the spectrum		      4
		(integer*4 value from 1 to 4852)						    		    (integer*4 value from 1 to 4852)
												    
irmas		The equivalent atmospheric thickness through		  4			    irmas	    The equivalent atmospheric thickness through	      4
		which the observation was obtained (=1.0					    		    which the observation was obtained (=1.0
		overhead scaled: airmass*1000; integer*4).					    		    overhead scaled: airmass*1000; integer*4).
												    
revs		The number of independent spectral scans		  4			    revs	    The number of independent spectral scans		      4
		which were added to make the spectrum						    		    which were added to make the spectrum
		(integer*4 number).								    		    (integer*4 number).
												    
iband(2)	The channel numbers which define the band		  8			    iband(2)	    The channel numbers which define the band		      8
		normalization (scaling to unity). (integers*4)					    		    normalization (scaling to unity). (integers*4)
												    
irwav		The record number within the file where the		  4			    irwav	    The record number within the file where the		      4
		wavelengths are found (integer*4).						    		    wavelengths are found (integer*4).
												    
irespt		The record pointer to where the resolution can		  4			    irespt	    The record pointer to where the resolution can	      4
		be found (or horizontal error bar) (integer*4).					    		    be found (or horizontal error bar) (integer*4).
												    
irecno		The record number within the file where the		  4			    irecno	    The record number within the file where the		      4
		data is located (integer*4 number).						    		    data is located (integer*4 number).
												    
itpntr		Text data record pointer. This pointer points		  4			    itpntr	    Text data record pointer. This pointer points	      4
		to a data record where additional text describing				    		    to a data record where additional text describing
		the data may be found.	(32 bit integer)					    		    the data may be found.  (32 bit integer)
												    
ihist		The program automatic 60 character history.		 60			    ihist	    The program automatic 60 character history.		     60
		(ASCII, character*60)								    		    (ASCII, character*60)
												    
mhist		Manual history (4 lines of 74 characters		296			    mhist	    Manual history (4 lines of 74 characters		    296
		each.  Program automatic for large history					    		    each.  Program automatic for large history
		requirements (ASCII, character*296).						    		    requirements (ASCII, character*296).
												    
nruns		The number of independent spectral runs			  4			    nruns	    The number of independent spectral runs		      4
		which were summed or averaged to make this					    		    which were summed or averaged to make this
		spectrum (integer*4).								    		    spectrum (integer*4).
												    
siangl		The angle of incidence of illuminating			  4			    siangl	    The angle of incidence of illuminating		      4
		radiation (Integer*4 number, in arc-seconds*6000).				    		    radiation (Integer*4 number, in arc-seconds*6000).
		(90 degrees=1944000000; -90 deg <= angle <= 90 deg)				    		    (90 degrees=1944000000; -90 deg <= angle <= 90 deg)
		integrating sphere = 2000000000							    		    integrating sphere = 2000000000
		Geometric albedo   = 2000000001							    		    Geometric albedo   = 2000000001
												    
seangl		The angle of emission of illuminating			  4			    seangl	    The angle of emission of illuminating		      4
		radiation (Integer*4 number, in arc-seconds*6000).				    		    radiation (Integer*4 number, in arc-seconds*6000).
		(90 degrees=1944000000; -90 deg <= angle <= 90 deg)				    		    (90 degrees=1944000000; -90 deg <= angle <= 90 deg)
		integrating sphere = 2000000000							    		    integrating sphere = 2000000000
		Geometric albedo   = 2000000001							    		    Geometric albedo   = 2000000001
												    
sphase		The phase angle between iangl and eangl			  4			    sphase	    The phase angle between iangl and eangl		      4
		(Integer*4 number, in arc-seconds*1500).					    		    (Integer*4 number, in arc-seconds*1500).
		(180 degrees=972000000; -180 deg <= phase <= 180 deg)				    		    (180 degrees=972000000; -180 deg <= phase <= 180 deg)
		integrating sphere = 2000000000							    		    integrating sphere = 2000000000
												    
iwtrns		Weighted number of runs (the number of runs		  4			    iwtrns	    Weighted number of runs (the number of runs		      4
		of the spectrum with the minimum runs which was					    		    of the spectrum with the minimum runs which was
		used in processing this spectrum, integer*4).					    		    used in processing this spectrum, integer*4).
												    
itimch		The time observed in the sample beam for		  4			    itimch	    The time observed in the sample beam for		      4
		each half chop in milliseconds (for chopping					    		    each half chop in milliseconds (for chopping
		spectrometers only). (integer*4)						    		    spectrometers only). (integer*4)
												    
xnrm		The band normalization factor. For data scaled		  4			    xnrm	    The band normalization factor. For data scaled	      4
		to 1.0, multiply by this number to recover					    		    to 1.0, multiply by this number to recover
		photometric level (32 bit real number).						    		    photometric level (32 bit real number).
												    
scatim		The time it takes to make one scan of the		  4			    scatim	    The time it takes to make one scan of the		      4
		entire spectrum in seconds (32 bit real number).				    		    entire spectrum in seconds (32 bit real number).
												    
timint		Total integration time (usually=scatime * nruns)	  4			    timint	    Total integration time (usually=scatime * nruns)	      4
		(32 bit real number).								    		    (32 bit real number).
												    
tempd		Temperature in degrees Kelvin				  4			    tempd	    Temperature in degrees Kelvin			      4
		(32 bit real number).								    		    (32 bit real number).
												    
data(256)	The spectral data (256 channels of 32 bit	       1024			    data(256)	    The spectral data (256 channels of 32 bit		   1024
		real data numbers).								    		    real data numbers).
-----------------------------------------------------------------------------			    -----------------------------------------------------------------------------
	case 1: total (bytes):					       1536			    	    case 1: total (bytes):					   1536
==============================================================================			    ==============================================================================
												    
*************** case 2: bit 00 = 1, bit 01 = 0 ****************					    *************** case 2: bit 00 = 1, bit 01 = 0 ****************
												    
icflag		Flags: see case 1					  4			    icflag	    Flags: see case 1					      4
												    
cdata(383)	The continuation of the data values (383 channels      1532			    cdata(383)	    The continuation of the data values (383 channels	   1532
		of 32 bit real numbers).							    		    of 32 bit real numbers).
------------------------------------------------------------------------------			    ------------------------------------------------------------------------------
	case 2: total (bytes):					       1536			    	    case 2: total (bytes):					   1536
==============================================================================			    ==============================================================================
												    
*************** case 3: bit 00 = 0, bit 01 = 1 ****************					    *************** case 3: bit 00 = 0, bit 01 = 1 ****************
												    
												    
icflag		Flags: see case 1					  4			    icflag	    Flags: see case 1					      4
												    
ititle		40 character title which describes the			 40			    ititle	    40 character title which describes the		     40
		data (ASCII, character*40).							    		    data (ASCII, character*40).
												    
usernm		The name of the user that created the data record	  8			    usernm	    The name of the user that created the data record	      8
		(ASCII, character*8).								    		    (ASCII, character*8).
												    
itxtpt		Text data record pointer. This pointer points		  4			    itxtpt	    Text data record pointer. This pointer points	      4
		to a data record where additional text may be					    		    to a data record where additional text may be
		may be found.  (32 bit integer)							    		    may be found.  (32 bit integer)
												    
itxtch		The number of text characters (maximum= 19860).		  4			    itxtch	    The number of text characters (maximum= 19860).	      4
												    
itext		1476 characters of text.  Text has embedded newlines   1476			    itext	    1476 characters of text.  Text has embedded newlines   1476
		so the number of lines available is limited only				    		    so the number of lines available is limited only
		by the number of characters available.						    		    by the number of characters available.
------------------------------------------------------------------------------			    ------------------------------------------------------------------------------
	case 3: total (bytes):					       1536			    	    case 3: total (bytes):					   1536
==============================================================================			    ==============================================================================
												    
*************** case 4: bit 00 = 1, bit 01 = 1 ******************				    *************** case 4: bit 00 = 1, bit 01 = 1 ******************
												    
icflag		Flags: see case 1					  4			    icflag	    Flags: see case 1					      4
												    
tdata		1532 characters of text.			       1532			    tdata	    1532 characters of text.				   1532
------------------------------------------------------------------------------			    ------------------------------------------------------------------------------
	case 4: total (bytes):					       1536			    	    case 4: total (bytes):					   1536
==============================================================================			    ==============================================================================
