Lidar system: is a laser based system used for retrieving aerosols profiles at high resolution in real time environment. The system is made of a high power pulsed laser and a detection system containing a telescope and detection units. The device used at INOE is an elastic backscatter system, working in a repetition state of 20 Hz at two wavelengths 1064, 532 nm. Our lidar is used for sounding distances of over 10 km reaching a 6 meters resolution. Because of the total weight and mass, this device is not suitable for scanning.
Mobile eye safe mini-lidar: especially made for field experiments, it has a new design that can provide manoeuvrability and easy handling. The system is equipped with a lighter and smaller telescope and a special made laser designed to operate for long periods of time. Expanding the laser beam and reducing it’s energy makes the system eye-safe, suitable for sounding in populated areas. This system is suitable for planetary boundary layer and low troposphere studies. It can provide unattended automated detection of aerosols up to 4 km. The versatility of the device is provided by the mechanical system used for scanning. The system has two polarisation channels at 355 nm.
DOAS: Based on the UV-VIS light absorption, the DOAS system is one of the devices used in the pollutant gas monitoring. Fast, reaching a precision of ppb(parts per billion), it is an adequate tool for long-term measurements of trace gases using the open path technology. The DOAS-M1 system can identify up to 33 molecular species and determine small concentration of gas pollutants in the open atmosphere, in real time. The system consist of two basic components – an emitting system consisting in a xenon lamp, a telescope collimating the light coming from the lamp and a retrieving system consisting in the same telescope, this time used for the redirection of light into a spectrograph that transfers data to a PC. In this case a retro reflector is used for redirecting the light back into the telescope.
Nondispersive Infrared (NDIR) sensors are simple spectroscopic devices often used for gas analysis. The main components are: an infrared source (lamp), a sample chamber or light tube, a wavelength filter, and the infrared detector. The gas is pumped (or diffuses) into the sample chamber. Gas concentration is measured electro-optically by its absorption of a specific wavelength in the infrared spectrum (IR). The IR light is directed through the sample chamber towards the detector. The detector has an optical filter in front of it that eliminates all light except the wavelength that the selected gas molecules can absorb. Ideally other gas molecules do not absorb light at this wavelength, and do not affect the amount of light reaching the detector.
The IR signal from the source is usually chopped or modulated so that thermal background signals can be extracted from the desired signal.
Fluorescence LIDAR system (Fluores): This is a light detection and ranging spectrometer made for sea scanning, especially suited for determining the status of the main sea components: dissolved organic matter and chlorophyll base compounds. It can also determine the presence of oil based pollutants.
The device can be ship borne or mounted on a mobile laboratory . Fluores system can retrieve data in real time with no sampling. The device can scan up to 50 m distance and in a 20 m water depth with a spatial resolution of 3 m, reaching a precision of 1 ppm for oil based substances and chlorophyll based substances.
Weather Station-WeatherMaster 2000: fully automated, it can retrieve data of pressure, wind speed, wind direction, relative humidity, air temperature, solar radiation. Some of the data will be used as an input in the lidar processing algorithm.
Gas analyzers-Draeger: is a mobile gas analyser capable of determining toxic gases, oxygen concentration and car residuals. The analyser is equipped with two electrochemical sensors build for NO2 and SO2 detection. They have a real time response, high sensitivity, long lifetime. It is easy to set them up and use. The device can measure concentrations between 0 and 100 ppm for SO2 and 0 to 50 ppm for NO2.
Particle Counter: used for outdoor measurements, equipped for determining the aerosol particle size distribution. The Particle Counter is a mobile instrument suitable for air and dust sampling in the surroundings or industrial sites.