RFM File Formats

.wid File: Widemesh Diagnostics

03OCT05
Type
Output(s), if WID Flag enabled.

Description
Diagnostics (mainly line counts) for widemesh intervals.

Filename(s)
Default is wid_[s][g].asc where [s] is the spectral range and [g] is the gas. If more than one absorber is specified then there is an additional file wid_[s].asc containing the combined data from all gases.
Different names may be specified in the *WID section of the Driver Table.

Structure
!HEADER1
!HEADER2
NWID WNO1 WNOD '=NWid,Wno1,DWno'
!HEADER3
IWID(i) WNOL(i) TOTL(i) WIDL(i) FINL(i) LOCL(i) XSC(i) CTM(i) Repeat for i=1:NWID
NINTL NEXTL '= Internal, external lines used for whole range'
[eof]

Fields
FieldTypeDescriptionActual Values
!HEADER1 C*80 Contains Gas and RFM version ID
!HEADER2 C*80 Text read from *HDR section of Driver Table
NWID I No. of Widemesh Intervals >0
WNO1 R*8 Lower Wavenumber [cm-1] of 1st Intervals
WNOD R*8 Width [cm-1] of Intervals
!HEADER3 C*80 Captions for columns in data records
IWID I Index of Widemesh Interval 1:NWID
WNOL R*8 Lower boundary Wavenumber [cm-1]
WNOD R*8 Wavenumber Increment [cm-1]
TOTL I Total number of lines considered =WIDL+FINL
NP I Total No. Lines considered
WIDL I No.lines used for widemesh interpolation
FINL I No.lines used for finemesh interpolation
LOCL I No.lines centred inside widemesh interval
XSC I 1=used cross-section, 0=used line data
CTM I 1=used continuum, 0=no continuum
NINTL I Tot No lines centred within spectral range
NEXTL I Tot No lines used centred outside spectral range

Notes
  1. In the 'total' .wid file, the XSC and CTM values represent the number of different molecules for which cross-section and continuum data were used.
  2. NINTL should be the sum of the LOCL values for each interval.
  3. NEXTL represents the number of additional lines lying outside the total output spectral range that were also included (typically within ±25cm-1).
  4. NINTL+NEXTL represents the total number of different lines used in the calculation.

Example
This is the output for a RFM run using a single CO2 line centred in the 952-953 cm-1 interval. It is shown as a local line for interval 3, its contribution is included explicitly for this and adjacent intervals (2-4), and as a quadratic interpolation in intervals 1 and 5. 
! co2     Widemesh Line count created by RFM v.4.04
!14-APR-00 RFM code test
          5   950.0000000000000       1.000000000000000     =NWid,Wno1,DWno
Itvl#  Wavenumber Tot.Lines = Wide mesh + Fine mesh  Local  X/Section Continuum
    1   950.00000         1         1         0         0         0         0
    2   951.00000         1         0         1         0         0         0
    3   952.00000         1         0         1         1         0         0
    4   953.00000         1         0         1         0         0         0
    5   954.00000         1         1         0         0         0         0
          1          0 = Internal, external lines used for whole range
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