This is software written in IDL for calculating the zodiacal light predicted from the DIRBE team interplanetary dust model (Kelsall et al. 1998, ApJ, 508, 44). This model was obtained by fitting the time variation of DIRBE all-sky observations over 10 months with a parameterized model of the dust cloud. Thus it is constrained over solar elongation angles ranging from 64 to 124 degrees. The Kelsall_zodi_model.tar file contains Readme - this file colcorr.tab - ascii table of color correction factors confint.pro get_zmod.pro mk_zdata.pro str_len.pro zkernel6p8.pro zl_coeffs_str.pro zmodel_init.pro zpars.xdr - IDL saveset of model parameters zutils.pro The top level routine is the function get_zmod.pro. ; Function GET_ZMOD ; ; Function to compute the Kelsall et al. 1998 (ApJ,508,44) ZODI model ; intensity for a given set of LOS, Wavelength, and Time. ; ; Written By: BA Franz ; Date: 23 January 1995 ; ; Usage: ; zodi = GET_ZMOD(lambda,day,lon,lat) ; ; Inputs: ; lambda - nominal DIRBE wavelength(s) in microns (any combination ; of 1.25, 2.2, 3.5, 4.9, 12, 25, 60, 100, 140, 240) ; day - 1990 day number(s), where 1.0 = 1 Jan 1990 ; lon - ecliptic longitude(s) ; lat - ecliptic latitude(s) ; ; note: lambda, day, lon, lat can be any mixture of scalars or arrays, ; but all arrays must be of same length. ; ; Outputs: ; ; zodi - scalar or array of zodi model intensity in MJy sr-1 ; For comparison with DIRBE data, this is 'quoted' intensity ; at the nominal wavelength(s) for an assumed source ; spectrum nu*F_nu = constant ; ; Optional Keyword Inputs: ; ; zpar=zpar - array of zodi model params. If not specified, the ; default will be restored from zpars.xdr ; no_colcorr=no_colcorr - if set, the result will be actual ; intensity at the specified wavelength(s) instead of ; quoted intensity for a spectrum nu*F_nu = constant