Combined Aerosol Trajectory Tool, CATT Illustrated Instruction Manual

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Combined Aerosol Trajectory Tool,
CATTIllustrated Instruction Manual

• Supported by
• MARAMA contract on behalf of
• Mid-Atlantic/Northeast Visibility Union (MANE-VU)
• for theInter-RPO Workgroup for Data Analysis
• Supplemental funding from
• Environmental Protection Agency, OAQPS ,
  Agreement 83114101-0
• National Science Foundation, Grant 0113868
•  
•  
• Performed by the
• Center for Air Pollution Impact and Trend
  Analysis (CAPITA, Washington University
• In collaboration with
• Cooperative Institute for Research in the
  Atmosphere, CIRA-VIEWS Program
• January 10, 2004

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CATT Software Components and Data Flow

• The CATT software consists of two rather
  independent components
• Chemical filter component. This component is
  accomplished through queries to chemical data
  sets. The output of this step is a list of
  qualified dates for a specific receptor
  location.
• Trajectory aggregator component. This
  component receives the list of dates for a
  specific location and performs the trajectory
  aggregation, residence time calculation and other
  spatial operations to yield a transport pattern
  for specific receptor location and chemical
  conditions.

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The CATT Browser Web Page

• The CATT program is a standard web page
  accessible through a URL by any user.
• The CATT browser has two data views, the Map and
  Time views. Each view serves double purpose to
  display data as maps or time series and to accept
  user input (clicking on Map/Time view) for
  navigation (browsing)
• To the left of each view are view-specific
  controls to change either the content or form of
  the view. The top group of controls, ViewControls
  relate to the entire view, the bottom group of
  buttons are the LayerControls and the changes
  depend on which active (current) layer is in the
  view.
• The general map view settings include setting the
  overall image size, geographic zoom rectangle
  (latitude-longitude), image margins and axis
  labels. The form, accessible through the
  magnifying glass button, is considered
  self-explanatory. The T button allows the entry
  of user-specified title on the map image.

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View Controls and Settings

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Status and Navigation Bar

• The Layer menu, highlighted in a yellow box, is
  an important navigational control of CATT. It
  displays and allows the selection of the current
  layer. Most of the user interaction is confined
  to the current layer. In CATT, the three layers
  are

• The File menu item is for the design of new
  applications. It should only be used by
  developers and not by routine browsers of CATT.

• Traj_Point which shows the value of the species
  at different loc and time.
• Trajj_Line depicts the ensamble trajectories as
  lines.
• Traj_Grid shows the gridded trajectories as
  shaded contours.