PRO dustem_write_gemissiv,file,st,help=help

;+
; NAME:
;   dustem_write_gemissiv
;
; PURPOSE:
;   writes information relating to grain emissivity in the
;   corresponding .DAT file
;
; CATEGORY:
;    DustEMWrap, Distributed, LowLevel, Initialization
;
; CALLING SEQUENCE:
;   dustem_write_gemissiv,file,st
;
; INPUTS:
;    st   : dustem data structure
;    file  : output file to be written
;
; OPTIONAL INPUT PARAMETERS:
;    None
;
; OUTPUTS:
;    None
;
; OPTIONAL OUTPUT PARAMETERS:
;    None
;
; ACCEPTED KEY-WORDS:
;    help     : writes this help
;
; COMMON BLOCKS:
;    None
;
; SIDE EFFECTS:
;    Files are written
;
; RESTRICTIONS:
;    The DustEM fortran code must be installed
;    The DustEMWrap IDL code must be installed
;
; PROCEDURES AND SUBROUTINES USED:  
;
; EXAMPLES:
;
; MODIFICATION HISTORY:
;    Evolution details on the DustEMWrap gitlab.
;    See http://dustemwrap.irap.omp.eu/ for FAQ and help.  
;-
  
  IF keyword_set(help) THEN BEGIN
     doc_library,'dustem_write_gemissiv'
     goto,the_end
  ENDIF


;3.0303E-01  2.0003E+05  2.9431E+04  2.1761E+04  1.3210E-25  5.6098E-26  5.6098E-26

OPENW,unit,file,/get_lun

Ntypes=n_elements(st)

frmt="(8E15.5)"
FOR i=0L,Ntypes-1 DO BEGIN
  printf,unit,st(i).lambir,st(i).qgra,st(i).qsi,st(i).qcar,st(i).qcccat,st(i).qccneu,st(i).qchcat,st(i).qchneu,format=frmt
ENDFOR

close,unit
free_lun,unit

the_end:
END