WMAP IDL Routines  V1.0             
                      Version 1.0 11-Feb-2003

The high-level WMAP IDL procedures can be divided into four categories:

1. FITS Readers: The following routines will read the the temperature (I) maps,
                  and time-ordered data, respectively. 

 FITS_READ_MAP - Read a HEALPIX formatted temperature map FITS file
                 (e.g. map_q_imap_yr1_v1.fits)
 FITS_READ_TOD - Read a MAP time-ordered data FITS file into an IDL structure
                 (e.g. MAP_tod_20022192357_20022202357.fits ) 

2. TOD Mnemonics: The following is a high-level routine to extract values of
   mnemonics from the time-ordered data (include both digital and analog
   housekeeping data as well as science data)

   Pckt2Mnemonic() - Returns the physical value associated with a MAP telemetry
                      mnemonic.

3. Mapping: The following routines will transform a temperature map in HEALPIX
projection into a flat-map projection and allow the user to draw various
overlays.

  REPROJ_HEALPIX - Convert a HealPix image to a flatmap projection 
  HEALINFO - prints values describing healpix formats of varying resolution
  HEALPIX_NESTED_VECTORS - Read Cartesian [X,Y,Z] direction vectors for HEALPIX 
                      pixel scheme
  GRID_OVERLAY - Plot coordinate grid lines over a projection
  CIRCOPLOT - Plots a circle of specified radius over an image projection
  PLANET_OVERLAY - Mark position of chosen planet on an existing image
  MAPVIEW - Interactive widget to display and zoom a Healpix map

4 Transformation: The following routines can be used as stand-alone routines to
convert between different time systems or projections.

 TIMETRANSFORM - Convert between different time formats
 COORTRANS - Transform between various J2000 coordinate systems
 MAP_DATE - Widget to convert between various MAP dates and times
 
Routines to give the MAP pointing direction at a given time (using the 
quaternions in the time-ordered data) are expected to be soon available in the
next software release.

Below are all the available 77 WMAP routines in alphabetical order

AIHK_Arch2Mnemonic() - Returns the physical value associated with an analog
   instrument housekeeping mnemonic, 
   extracting the data from an AEU sweep from a time-ordered 
AIHK_GetMnemonic() -  Returns a physical value associated with a mnemonic, 
   extracting the data out of a sweep of analog instrument housekeeping telemetry 
   data.
AIHK_Pckt2Mnemonic() - Return the physical value associated with an analog
   instrument housekeeping mnemonic, extracting the data from a DEU telemetry 
   sweep.
AIHK_Mnem2Serial - Return the serial number of an analog instrument
   housekeeping (AIHK) PRT.
AIHK_Mnem2Serial_List - Returns an array of structures that associates mnemonics
   with serial numbers for sensor ids.
AIHK_MnemTime - Returns the time offset into a AIHK packet for the measurement
   of a given mnemonic.
AIHK_MnemTimeStamp - Returns an array of time stamps for a given mnemonic in
   an array of analog instrument housekeeping (AIHK) elements.
AIHK_Mnem_Coefs -  Returns the conversion coefficients associated with an analog
   instrument housekeeping  mnemonic. 
AIHK_Mnemonic - Returns the array index of an analog
   instrument housekeeping mnemonic.  
CircOplot - Overplots a circle of requested radius on a Mollweide or
   Zenithal equal area projection.
CoorTrans - Transforms input J2000 coordinates into the requested
   J2000 output coordinate system.
CW_ImageDraw() - Defines a compound widget containing a scrollable draw widget 
   to be used to display images.
CW_ImageFull() - Define a compound widget containing a draw widget to be
   used to display entire images at reduced resolution.
CW_ImageBoth() - Define a compound widget to contain both a full resolution 
   image in a scrollable draw widget and a compressed image
Date2Jul() - Converts a Gregorian date and time into a reduced Julian date.
DayOfYear - Determines the day-of-year for a date.
DefTSRef() - Return the default MAP timestamp reference GMT 
DIHK_GetMnemonic() - Returns a physical value associated with a mnemonic, 
   extracting the data out of an array of digital 
   instrument housekeeping telemetry data.
DIHK_Pckt2Mnemonic() - Returns the physical value associated with a digital
   instrument housekeeping mnemonic, 
   extracting the data from a DEU telemetry packet.
DIHK_Mnemonic() - Returns the array index of a digital instrument housekeeping 
    mnemonic.  
DIHK_Mnem_Coefs -  Returns the conversion coefficients associated with a digital
   instrument housekeeping (DIHK) mnemonic.  Automatically written.
DispGMT() - Converts a time formatted as a MAP GMT into a more human-readable form.
DispTS() - Converts a MAP timestamp into a more human readable format.
DOY2Date - Converts a year and day-of-year into a five element date vector.
   This is the reverse of dayofyear.pro
DOY2Jul - Converts a year and day-of-year into a MAP Reduced Julian day.
extract_band_index -  Extracts the frequency band and array index value from 
   an input channel string. Supporting routine for sci_getmnemonic.
frame_avg() - Computes single or multiple frame averages of science data.
   Supporting routine for sci_getmnemonic.
frame_rms() - Computes single or multiple frame rms of science data.
   Supporting routine for sci_getmnemonic.
FITS_Read_TOD - Read timeordered archive data from a binary FITS  table.
FITS_Read_Map - IDL procedure to read MAP archive-format sky maps
Get_DEU_Int_Temp - Converts DEU internal temperature from counts to degrees
   Centigrade via a lookup table.
Get_Heal_LUT - Procedure to read and return a user-selectable look-up table.
Get_Heal_RES() - Function to compute the resolution of a heal-pixelized
   sky map, given the number of map pixels.
Get_PRT_Temp - Converts PRT resistance in ohms to temperature in Kelvin,
   given the PRT serial number.
Get_Rot_Matrix() - Returns rotation matrix for conversion between the specified
   input and output coordinate systems.
GMT2Jul() - Converts a MAP GMT date/time string into a reduced Julian date.
GMT2TS - Converts a MAP GMT into a MAP timestamp.
GMT2YMD - Converts the YYYYDDD portion of a MAP GMT string into a string
   of format YYYYMMDD.
Grid_Overlay - Overplots coordinate grid on a Mollweide or Stereographic
   projection.
HEALinfo - IDL procedure to return or print information on
   HEALPix resolutions.
HEALPIX_Nested_Vectors -  IDL procedure to read Cartesian [X,Y,Z] direction 
   vectors from binary file for HEALPIX pixel scheme, nested pixel order.
HealPix_to_Image - Convert a 1-d Healpix  map into a 2-d byte-scaled image ready
    for display
Jul2Date - Converts a reduced Julian date into a Gregorian date and time.
   Unlike a classic reducted Julian date, the full Julian date is 
   recovered by adding 2450000.
Jul2GMT ()- Converts a MAP GMT date/time string into a Julian date.
Jul2Tel - Converts a MAP Reduced Julian day into a telemetry structure timestamp.
Jul2TS() - Converts a MAP Reduced Julian day into a time stamp.
KeyArray() - Breaks a string containing a number of comma-delimited elements
   into an array of strings.
KeyFile - Reads a file containing keyword/value pairs into an array of
   structures, each element of which contains a keyword/value pair.
KeyParse - Breaks a string into a keyword/value pair.
LoadCT_012 - load a standard IDL color table with the first three colors 
       reserved as white, black and grey
Load_MAP_Params - Reads the contents of the general MAP program parameters 
   file into an IDL structure.
MAP_Date - Widget to convert the various MAP time and date formats
MAPView - Interactive widget to display and zoom a Healpix map
Mnem_Type() - Function to return the type of mnemonic associated with an input
   mnemonic, eg. 'AIHK', 'SCI', etc.
mollweide() - Computes Mollweide angle theta from input latitudes.
mollweide_xy - Converts longitude and latitude coordinates to x,y positions on
   a Mollweide projection.
Now2Jul() - Returns the current system time as a MAP Reduced Julian day.
Pckt2Mnemonic() - Returns the physical value associated with a MAP telemetry
   mnemonic.  This is a wrapper routine that calls the appropriate 
   specific routine depending on mnemonic type.
Planet_Overlay - Plots a planet's position on an existing skymap within a
   screen window.
projxy2coord - Converts (x,y) positions on a Mollweide or Zenithal Equal Area
   projection to longitude and latitude.
rotx() - Computes rotation matrix for rotation about x axis.
rotz() - Computes rotation matrix for rotation about z axis.
Sci_GetMnemonic() - Extracts a channel of radiometer data from an array of 
   sciencepackets.  Depending on mnemonic prefix,the routine can also 
   return a frame average or rms.   
Sci_Mnemonic() - Tests whether or not a given science mnemonic is valid.
ScrTV - Displays an image in a scrollable draw widget.  This allows the
   user to examine a full resolution portion of the image, using 
   the scrollbars to navigate around.
Tel2Jul() - Converts a MAP telemetry structure time stamp into a reduced
   Julian date.
TimeTransform - Converts one time format into another.
TS2GMT - Converts a MAP timestamp into a MAP GMT.
TS2Jul() - Converts a time stamp into a MAP Reduced Julian day.
Reproj_HealPix - Convert a HealPix image to a flatmap projection
spread_pckt_tjul() -  Propagate science packet times in reduced Julian format to
   each observation within a packet. Supporting routine for sci_getmnemonic.
TextRead - TextRead reads a non-empty record/line from an open text file.
   Lines are read until a nonzero length string is read.
TimeStamp_AddTime - Adds to a MAP Omega time stamp.
timestamp_diff() - Determine the diffence between two time stamps.
tod_format() - Defines the time-ordered data (TOD) structure format
Xcolors - Interactively change color tables (from David Fanning's Library)
zea_xy -  Converts longitude and latitude coordinates to x,y 
   positions on a Zenithal equal area projection.
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