contents.txt

basic median filter simulation

header
HEXTRACT - Extract a subimage and update astrometry in a FITS header
HPRECESS - Precess the astrometry in a FITS header to a new equinox.
HREBIN - REBIN an image and update the astrometry in a FITS header
HREVERSE - Reverse an image about either dimension and update astrometry
        in a FITS header                                    
HROT  - Rotate an image and update astrometry in a FITS header.
HROTATE - Apply IDL ROTATE function and update astrometry in a FITS header
MAKE_ASTR - Build an astrometry structure from input parameter values
PRECESS_CD - Precess coordinate description (CD) matrix in a FITS header 
          to a new equinox.   Called by HPRECESS
PUTAST - Put astrometry parameters (e.g. rotation, plate scale) into a FITS header. 
STARAST - Obtain an exact astrometry solution given the coordinates and
        plate position of 2 or 3 stars.
UPDATE_DISTORT - Update SIP astrometry coefficients for a linear transformation	
WCS_GETPOLE -  Compute the coordinates of the native pole for non-polar projection
WCSSPH2XY - Convert between longitude,latitude to X,Y angular coordinates for
        25 different map projection types
WCSXY2SPH - Inverse of WCSSPH2XY
WCS_DEMO - Demo program for WCSSPH2XY and WCSXY2SPH
WCS_ROTATE - Rotate between standard (e.g. celestial) and native coordinates
XYAD  - Use FITS header to convert pixel (X,Y) to celestial(RA, Dec) coordinates
XY2AD - Use astrometry structure to convert pixel to celestial coordinates
XYXY -  Convert X,Y values on one image to X,Y values in another image
         using astrometry in the FITS headers

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STSDAS Image manipulation         in pro/sdas
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EXTGRP - Extract group parameter information out of SXREAD output
ST_DISKREAD - Read an HST FITS file and reconstruct a GEIS (STSDAS) file
SXGINFO -  Return info on all group parameters in a FITS header
SXGPAR() - Obtain group parameter values from a FITS header and parameter block
SXGREAD() -  Read group parameters from an STSDAS file
SXHCOPY -  Copy a selected portion of one header into another
SXHMAKE -  Create a basic STSDAS header file from an IDL data array
SXHREAD -  Read a STSDAS header from disk
SXHWRITE - Write a STSDAS header to disk
SXMAKE -   Make a basic STSDAS header from an IDL array
SXOPEN -   Open an STSDAS disk file for subsequent I/O
SXREAD() -   Read an STSDAS image from disk
SXWRITE -  Write an image to STSDAS  format

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FITS ASCII & Binary Table I/O      in pro/fits_table      ( see text/ft.tex )
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FTAB_DELROW - Delete specified rows in a FITS table extension
FTAB_EXT - Extract specified columns of a FITS table extension into IDL vectors
FTAB_HELP - Print info about the fields in a FITS table extension
FTAB_PRINT - Print specified columns and rows of a FITS table extension
FTADDCOL - Add a new column to a FITS ASCII table
FTCREATE - Create an empty FITS ASCII table header and data array
FTDELCOL - Delete specified column from a FITS ASCII table data array
FTDELROW - Delete specified row(s) from a FITS ASCII table data array
FTGET() - Extract a specified field from a column in a FITS ASCII table array
FTHELP - Display the fields in a FITS ASCII table header
FTHMOD - Modify the attributes of a field in a FITS ASCII table
FTINFO - Return an informational structure from a FITS ASCII table header
FTKEEPROW - Subscript (and reorder) a FITS ASCII table array
FTPRINT - Print specified columns and rows in a FITS ASCII table array
FTPUT - Update or add data to a field in a FITS ASCII table array
FTSIZE - Return the size and number of fields in a FITS ASCII table  array
FTSORT - Sort a FITS ASCII table according to the values in a specified field.
TBDELCOL - Delete specified column from a FITS Binary table array
TBDELROW - Delete specified row(s) from a FITS Binary table array
TBGET() - Extract a specified field from a column in a FITS Binary table
TBHELP - Display the fields in a FITS Binary table header
TBINFO - Return an informational structure from a FITS Binary table header
TBPRINT - Print specified columns and rows in a FITS Binary table array
TBSIZE - Return the size and number of fields in a FITS Binary table array

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FITS Binary Table Extensions I/O    in pro/fits_bintable
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FXADDPAR          - Add or modify a parameter in a FITS header array.
FXBADDCOL         - Adds a column to a binary table extension.
FXBCLOSE          - Close a FITS binary table extension opened for read.
FXBCOLNUM()       - Returns a binary table column number.
FXBCREATE         - Open a new binary table at the end of a FITS file.
FXBDIMEN()	  - Returns the dimensions for a column in a FITS binary table.
FXBFIND           - Find column keywords in a FITS binary table header.
FXBFINDLUN()      - Find logical unit number UNIT in FXBINTABLE common block.
FXBFINISH         - Close a FITS binary table extension file opened for write.
FXBGROW           - Increase the number of rows in a binary table
FXBHEADER()       - Returns the header of an open FITS binary table.
FXBHELP           - Prints short description of columns in a FITS binary table.
FXBHMAKE          - Create basic FITS binary table extension (BINTABLE) header.
FXBINTABLE        - Common block FXBINTABLE used by "FXB" routines.
FXBISOPEN()       - Returns true if UNIT points to an open FITS binary table.
FXBOPEN           - Open FITS binary table extension  for read or update
FXBPARSE          - Parse the binary table extension header.
FXBREAD           - Read a data array from a disk FITS binary table file.
FXBREADM          - Read multiple columns/rows from a FITS binary table file.
FXBSTATE()        - Returns the state of a FITS binary table.
FXBTDIM()         - Parse TDIM-like keywords.
FXBTFORM          - Returns information about FITS binary table columns.
FXBWRITE          - Write a binary data array to a disk FITS binary table file.
FXBWRITM          - Write multiple columns/rows to a FITS binary table file
FXFINDEND         - Find the end of a FITS file.
FXHCLEAN          - Removes required keywords from FITS header.
FXHMAKE           - Create a basic FITS header array.
FXHMODIFY         - Modify a FITS header in a file on disk.
FXHREAD           - Reads a FITS header from an opened disk file.
FXPAR()           - Obtain the value of a parameter in a FITS header.
FXPARPOS()        - Finds position to insert record into FITS header.
FXREAD            - Read basic FITS files.
FXWRITE           - Write a disk FITS file.

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FITS I/O        in pro/fits
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CHECK_FITS - Check that array agrees with NAXISi, BITPIX keywords of FITS header
FITSDIR - Display info about primary FITS header(s) on disk
FITSRGB_to_TIFF - Combine separate red, green, blue FITS files into TIFF format
FITS_ADD_CHECKSUM - Add/update the CHECKSUM/DATASUM keywords in a FITS header
FITS_ASCII_ENCODE() - Encode an unsigned longword as an ASCII string
FITS_CLOSE - Close a FITS file defined by a FITS Control Block (see FITS_OPEN)
FITS_HELP - Summarize the primary data units and extensions in a FITS file
FITS_OPEN - Open a FITS file and define a FITS Control Block (FCB)
FITS_READ - Read a FITS file specified by name or FITS Control Block (FCB)
FITS_TEST_CHECKSUM() - Verify the values of the CHECKSUM/DATASUM FITS keywords
FITS_WRITE - Write a FITS primary data unit or extension
FITS_INFO - Display info about disk FITS file(s) at a terminal or in Common 
FXMOVE() - Skip a specified number of extensions in a FITS file
FXPOSIT() - Open a FITS file positioned to beginning of a specified extension
HEADFITS() - Read a FITS header from a disk FITS file.
MKHDR - Make a minimal FITS header for an image array.
MODFITS - Modify the header or data in a FITS array (without changing the size)
MRDFITS() -  Read FITS file mapping table columns into IDL structure tags
MRD_HREAD -  Like FXHREAD but can also read a FITS header from a Unix pipe
MWRFITS - Write a FITS file from a IDL array or structure
RDFITS_STRUCT - Read an entire disk FITS file into an IDL structure
READFITS() - Read a disk FITS file into an IDL data and header array.
SXADDHIST - Add a history record to a FITS header
SXADDPAR -  Add or modify a parameter in a FITS header
SXDELPAR -  Delete a keyword from a FITS header
SXPAR()  -   Obtain the value of a keyword in a FITS  header
WRITEFITS - Write IDL data and header array to a disk FITS file.

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Image Manipulation       in pro/image
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BOXAVE() - Boxave an image, always using at least REAL*4 arithmetic
CONVOLVE() - Convolve an image with a PSF using the product of Fourier Transforms
CORREL_IMAGES() - Correlation of two images.   Called by CORREL_OPTIMIZE
CORREL_OPTIMIZE - Compute the optimal pixel offset of one image relative
         to another by maximizing the correlation function.
CORRMAT_ANALYZE - Analyze the correlation function made by CORREL_IMAGE
CR_REJECT - General iterative cosmic ray rejection for 2 or more images
DIST_CIRCLE - Create a mask array useful for circular aperture photometry.
DIST_ELLIPSE - Create a mask array useful for elliptical aperture photometry.
FILTER_IMAGE() - Like MEDIAN or SMOOTH but handles edges & allows iteration
FREBIN - Expand or contract an image while conserving flux
IMLIST - Display image pixel values around a specified center
MAX_ENTROPY - Deconvolution by Maximum Entropy, given a PSF
MAX_LIKELIHOOD - Deconvolution by maximum likelihood, given a PSF
MEDARR - Median filter across a set of images (e.g. for cosmic ray removal)
POSITIVITY() - Map an image uniquely and smoothly into all positive values
PSF_GAUSSIAN() - Create a 1-d, 2-d, or 3-d Gaussian with specified FWHM, center
SIGMA_FILTER() - Replaces pixels deviant by more than a specified sigma from
    its neighbors.   Useful for cosmic ray removal.
SKYADJ_CUBE - Remove the sky level from individual images of a data cube
XMEDSKY - Compute the median sky as a 1-d function of X (for slitless spectra) 

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Math and Statistics    in pro/math
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ASINH() - Return the inverse hyperbolic sine of its argument
AVG() - Return the average value of an array or 1 dimension of an array.
CIC - Cloud In Cell interpolation of irregularly gridded data
CSPLINE() - Interpolate using the Numerical Recipes natural cubic spline
FACTOR - Find the prime factors of a given number (in /jhuapl)
FITEXY - Best straight-line fit to data with errors in both coordinates
FLEGENDRE() - Compute the first M terms in a Legendre polynomial expansion
GAUSSIAN() - Evaluate a 1-d Gaussian and optionally its derivative
HERMITE() - Interpolate a tabulated function using a Hermite spline
KSONE -  Compute the one-sided Kolmogorov-Smirnov statistic
KSTWO -  Compute the two-sided Kolmogorov-Smirnov statistic
KUIPERONE - Compute the one-sided Kuiper statistic (NR)
KUIPERTWO - Compute the two-sided Kuiper statistic (NR)
LINMIX_ERR - Bayesian approach to linear regression with errors in both X and Y
LINTERP - Linearly interpolate X,Y vectors onto a new X grid      
MEANCLIP - Compute an iteratively sigma-clipped mean on a data set
MLINMIX_ERR : Bayesian approach to linear regression with errors in both X and Y and multiple independent variables.
MINF_BRACKET - Find 3 points which bracket the minimum of a function
MINF_CONJ_GRAD - Find local minimum of a scalar valued function of several
        variables using conjugate gradient method 
MINF_PARABOLIC - Minimize a function using Brent's method with parabolic interpolation 
MINF_PARABOL_D - Minimize a function using Brent's method with derivatives
MLINMIX_ERR : Bayesian approach to linear regression with errors in both X and Y and multiple independent variables.
MRANDOMN : Generate random vectors from a multivariate normal density.
MULTINOM - Simulate multinomial random variables
NGP - Nearest Grid Point interpolation of irregularly gridded data
PCA - Perform a principal component analysis (Karhunen-Loeve expansion)