1. Data sources
   1. modis
      1. aqua
      2. terra
      3. deep blue
      4. ocean
      5. land
   2. omi
      1. aod
      2. aaod
      3. ai
   3. misr
   4. Parasol
2. Techniques
   1. Obs Handling
      1. retrievals
      2. 1d-var
      3. radiances
   2. Analysis
      1. Bias Correction
         1. GLM concepts
         2. Eulerian/Lagrangian
      2. Random component
         1. Lagrangian aspects
         2. Feature aligment
         3. Ensemble concepts
   3. Q/C
      1. Adaptive Buddy Check
      2. NRL AdHoc
3. Software
   1. Analysis
      1. PSAS
      2. GSI
   2. Python
   3. AeroObs
4. People
   1. Arlindo
   2. Virginie
   3. Ravi
5. GSI Obs Operators
   1. CRTM Simulator
      1. Gridded
      2. Iron out CRTM/GOCART interface
      3. Assess Impact on BTs
   2. Errico's OSSE Simulator
      1. Read Nature/Aero fields
      2. Full T511 Gaussian grid
      3. Produce aerosol affected radiances
   3. GSI Experiments
      1. Produce Analysis with Aerosol contaminated radiances
      2. Assess Impact of aero contamination
      3. Implement aerosols in GSI Obs operators
      4. Assess Impact on Analysis