MONORTM_v4.0

• Code has been updated to allow monochromatic calculations at frequencies beyond the microwave region. These updates include the implementation of CO2 line coupling and the option to include cross-section molecules. Format of output files has been modified to accommodate this change.
• Calculation of the total internal partition sum has been updated to be consistent with the calculation in LBLRTM.
• MonoRTM now uses MT_CKD_2.1 continuum (previously was using CDK_2.4).
• An error in the nitrogen continuum has been corrected.
• The INP option has been replaced by the use of IATM=1 or IATM=0 (consistent with LBLRTM). A stand-alone IDL program is provided to convert ARM netCDF profiles into MONORTM input format.

MONORTM_v3.3

• directory structure has been changed to make it more consistent with LBLRTM
• the 22GHz and the 183GHz water vapor lines have been updated (Payne et al, 2007)
• the 325 GHz water vapor line has been updated to reflect CRB calculations by Gamache
• the 380 GHz water vapor line has been updated according to measurements by Koshelev et al (2007)
• corrected error in surface reflectance code
• updated limb radiative transfer code

MONORTM_v3.0

• code has been updated to allow scaling of profiles
• spectral line file has been modified to include new oxygen line widths and line-coupling coefficients from Tretyakov et al (2005)
• more lines in the spectral line file are now included in the fast option, to increase accuracy at higher frequencies and lower water vapor amounts

MONORTM_v2.20

• code has been restructured and made more robust
• new makefiles allow for the creation of single and double precision code on SGIs and on MacOSX

MONORTM_v2.12

• a new LBLATM module has been added, which is consistent with the LBLATM module currently used by LBLRTM
• several minor coding inconsistencies, which led to compilation errors under some compilers, have been eliminated

MONORTM_v2.11

• O2 line coupling parameters have been modified to yield significantly better agreement with MWRP measurements in the 50-60 GHz range
• code output contains more detailed information on the current version of the software and the spectral lines file

Atmospheric and Environmental Research Inc. (AER)