air quality assessment & management
Reference and User Manual
      AirWare   On-line Reference Manual
        Release Level 7.0
        Revision Level beta
        Release Date 2015 03

      Last modified on:   Tuesday, 1-Dec-15 11:07 CET

      OBJECT Data Base: Monitoring Station

      Monitoring Stations describe the physical monitoring equipment, its location, and lead to the actual monitoring time series. This includes meteorological variables, emissions, and ambient concentrations. A special case are traffic observations in real time.
      The monitoring stations are accessible to a CLASS specific OBJECT selector, that list the stations (sortable list), indicates their type (air quality, meteorology, combined) and shows the number of time series associated with each station. The last number shown is the total number of valid data points, also displayed as a color coded (ranking) bar.

      A Monitoring Station Object is defined by its HEADER including a hypertext page describing it, and the list selector for all the time series collected there.

      Other attributes are grouped into topics that are shown in pop-up windows triggered by (optional) BUTTONS. They include:

      1. Links to other objects
      2. Administrative information
      3. Technical information

      Time series (parameter) selection>

      Under the Object HEADER, the page displays a selector of available time series, organized in terms of their parameters. The selector (full page width) shows:

      1. Parameter name
      2. Last measurement (end date)
      3. First measurement (start date)
      4. Time step (symbolic, i.e., a STRING that can also indicate irregular sampling or bi-monthly);
      5. unit
      6. Number of observations
      7. Coverage in % (100-% of missing values).

      The MONITORING TIME SERIES themselves consist of a HEADER, and the actual time-stamped values. TIME SERIES META DATA compiled during the import process, include:

      1. USER: (determined automatically)
      2. NAME: a descriptive (short) name for the time series that will be used in the selector list;
      3. TYPE: one of historical or real-time.
      4. DESCRIPTION: a free text field that defines, e.g., data source (such as the original monitoring station/sensor), method for patching, assumptions (for synthetic time series);
      5. LOCATION: defines the geographical scope (on import, this selected by the user from a list of pre-defined options, or generated automatically from the application's CONFIGURATION information if the data base covers a single location);
      6. VARIABLE: (or parameter selected from a pre-defined list) with its associated UNIT;
      7. START DATE: will be determined automatically from the time stamps of the imported data.
      8. TIME STEP: symbolic label for the time stamp (e.g., hourly, daily, monthly, irregular); internally, we can derive the time tep in minutes from the delta between the obervations;
      9. GENERATED: date of original imnport;
      10. LAST MODIFIED: date of last update, mainly for real-time data;

      Other descriptive information is organized in two linked pages:

      1. Administrative information, describing the owner or operator, contact addresses etc.
      2. Technical information, describing the actual monitoring equipment used, telemetry, etc.

      Data Items

      Administrative information

      • Address block for the institution and a contact person with an optional second (local, on site) address, derived from the INSTITUTIONS data base, relational contact/address data base TABLE.

      Technical information

        Sensors List of sensors/methods used for the parameters monitored;
        for each sensor, the following information can be stored and displayed in a separate pop-up window:
        1. Sensor name
        2. Hypertext link (URL) for descriptive text and optional imagery.
        3. Manufacturer
        4. Model name
        5. Sensor technology
        6. Year of installation
        7. Date of last maintenance/calibration

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