===== SWIR Carbon Observation Retrieval Model Intercomparison Project (SCORE-MIP) =====

== Documents provided by Hartmut Boesch, University of Leicester==

{{ :studies:score_mip:score_mip.pdf|Overview of the study }}

{{ :studies:score_mip:task1a_rt_comparison_march2010.pdf|Details for radiative transfer intercomparison }}

== Computation directory == 

  /home/users/emde/model_intercomparisons/SWIR_RT_intercomparison/


== RT Setup ==
 
  * All calculations performed using libRadtran (www.libradtran.org)
  * Contribution to accurate RT cases, scalar (DISORT and MYSTIC), vector (MYSTIC)
  * for DISORT 32 streams and second order intensity correction are used
  * [[:studies:score_mip:cpu_times|CPU times]]

** Comments **
  * For MYSTIC with polarization the noise for Q in clear-sky atmosphere is large, because photons reflected at the surface only contribute to I, not to Q --> include some importance sampling method to enhance Rayleigh scattering?
  * Optical properties (aerosol_files can be used for scalar calculations) can not be specified in the required way (spectral ssa, spectral altitude dependent tau, constant phase matrix) 
      * best solution now: optprop_file including spectral ssa, const phamat, ext=1, use wc.dat to specify tau (but this could only be done sequentially for all wavelengths, much overhead). 
      * may be better: make a aerosol_files option for phase matrix (but this requires too much memory).  


== 5 spectral ranges ==

  * [[:studies:score_mip:b1_w1|Band 1: O2 A-band, Window 1]]
  * [[:studies:score_mip:b1_w2|Band 2: O2 A-band, Window 2]]
  * [[:studies:score_mip:b2_w1|Band 2: 1.61 micron CO2 band, Window 1]]
  * [[:studies:score_mip:b3_w1|Band 3: 2.04 micron CO2 band, Window 1]]
  * [[:studies:score_mip:b3_w2|Band 3: 2.04 micron CO2 band, Window 2]]

==== Results ====

First results: {{:studies:score_mip:libradtran.tar.gz|}}

  - DISORT: 
      * Cases A-E, scalar, no sun glint
  - MYSTIC: 
      * Cases A,B,E, scalar, no sun glint
      * Cases A,B,E, vector, including sun glint

==== Status ====

  * MYSTIC scalar for sun glint to be done
  * DISORT for sun glint to be done
  * MYSTIC ice clouds with more photons