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Spectral Atmospheric Suite (SAS)

Features

The Spectral Atmospheric Suite is a portable, autonomous network of instruments which measures a host of trace gases, including greenhouse gases (GHGs) and urban pollutants. The network consists of three "nodes", with each node consisting of 1 × Fourier Transform Infrared (FTIR) spectrometer, 1 × Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument, and 1 × automatic weather station. Each node has the capability of measuring the slant column densities, and from this, the surface concentrations, of the following trace gases:
  • CO2
  • CH4
  • CO
  • NO2
  • SO2
  • Tropospheric O3
  • HCHO
  • HONO
  • Halogen oxides, such as IO and BrO
  • Glyoxal
  • Specifications

    Fourier Transform Infrared Spectrometer -- Bruker EM27/SUN

    Species Measured:
    Carbon dioxide (CO2), methane (CH4), carbon monoxide (CO)
    Spectral range:
    5,000 to 14,5000 cm-1
    Spectral reolution:
    0.5 cm-1

    Multi-Axis Differential Optical Absorption Spectroscopy -- AirYX 2D MAX-DOAS

    Spectral range:
    UV: 300 nm -- 465 nm, resolution 0.6 nm; VIS: 460 nm -- 600 nm, resolution 0.6 nm
    Species Measured:
  • NO2
  • SO2
  • Tropospheric O3
  • HCHO
  • HONO
  • Halogen oxides, such as IO and BrO
  • Glyoxal
  • Scanning range:
    -10° to 190° in elevation angle; 0° to 180° in azimuth

    Automatic weather station -- WXT536 Vaisala Weather Transmitter

    The WXT536 measures:
  • Pressure
  • Temperature
  • Humidity
  • Rain
  • Wind speed
  • Wind direction



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