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diff --git a/noao/onedspec/irsiids/doc/coefs.hlp b/noao/onedspec/irsiids/doc/coefs.hlp new file mode 100644 index 00000000..777933bc --- /dev/null +++ b/noao/onedspec/irsiids/doc/coefs.hlp @@ -0,0 +1,57 @@ +.help coefs May85 noao.imred.iids/noao.imred.irs +.ih +NAME +coefs -- Extract dispersion coefs from mtn HeNeAr headers +.ih +USAGE +coefs input records database +.ih +PARAMETERS +.ls input +The input image root name for the spectral images containing the +dispersion coefficients. +.le +.ls records +The range of records for which the root name applies. +.le +.ls database +The database file name which will contain the coefficients. +.le +.ih +DESCRIPTION +The spectra specified by the combination of the root name +and the records are scanned for the presence of dispersion +coefficients. If present, the coefficients and necessary +information are written to the file indicated by the database +parameter. This file an then be used by the linearization +program DISPCOR to correct any spectra for which the +database is appropriate. + +Each invocation of COEFS appends to the database file, or +creates a new file if necessary. + +The following assumptions are made concerning the coefficients, +which are always correct for IIDS and IRS mountain reduced +data at Kitt Peak. +.ls 5 (1) +The coefficients represent Legendre polynomials. +.le +.ls (2) +The coefficients apply to pixels 1 through 1024 in the original data. +.le +.ih +EXAMPLES +The following example reads the coefficients from the headers +for nite1 arc spectra taken near the beginning and end of the +night and creates a database file called nite1.db: + + cl> coefs nite1 3-4,201-202 nite1.db + +.ih +TIME REQUIREMENTS +Approximately 1 second per spectrum is required. This is primarily +overhead due to file access. +.ih +SEE ALSO +dispcor, identify +.endhelp |