Search

Application of CCD array photodetector technology is shown to provide record synchronously hundreds of spectral intervals, increase essentially the relative aperture and intensity of echo-signals in the input optical path as well as to reduce the mass – dimension parameters of hyperspectral Raman LIDAR as a whole for geoecological monitoring by aerial and underwater unmanned vehicles.

Measuring of absolute 13C/12C isotope amount ratios allows to explore the topical problems of the modern world, alcoholic beverages and tobacco, medical diagnostics of human health. Raman sensor is used to measure the ratio of carbon isotopes in the exhaled carbon dioxide, which is used to diagnose the human infection of Helicobacter pylori and the influence of the Helicobacter pylori bacterium on the occurrence of gastritis, gastric and duodenal ulcers. A method for the analysis of human infection with Helicobacter pylori was developed on the basis of measurements of the ratio of 13C / 12C carbon isotopes in human exhaled air with a high level of measurement accuracy. The provision of comparability of absolute 13C/12C isotope amount ratios is carried by gravimetrically prepared reference standards. The key features and emerging issues are discussed.

Lidar module that allows perform spiral scanning of the investigated area was developed. Software for managing and reading the angular coordinates of the laser beam was created. An example implementation of such a module performing a combined scan in wide and narrow angle fields was shown.

Design and functional subsystems of a lidar sensor for the remote detection of isotopes of iodine, indicators of radioactive contamination was developed. CARS-lidar allows to register the radionuclide with a concentration level of 3÷10 molecules has been shown.

Upgraded Raman Lidar with spectral resolution of dλ/λ≤10 have been design and elaborated for the aerosearch of leaks on the main gas pipelines. The sensing is carried out by 7ns pulses of DPSS laser with energy of 10 mJ at 300Hz frequency and wavelength of 261.7 nm. Polycromator have been implemented on base of the concave grating (N=1200 mm) and operates in 4th diffraction order. Lidar measures the leaks of CH4 with concentration of 2 ppm and above. Scanning in angles of ±30о and at frequency of 20 Hz allows to carry out measurements on inclined courses.

Remote laser spectroscopy availability for airborne search of radionuclides polution has been examined. Experiments were carried out under the CARS circuit. The method of remote detection a radionuclide in atmosphere from container burial places and in places of recycling the fuel waste of the atomic power station is elaborated. Preliminary results of investigation show the real possibility to register of leakage of a radionuclide with concentration at level of 1010 см on a safe distance from the infected object.

Currently Arctic dramatic changes due to global warming, in addition, it is influenced by globalization and cross-border pollution . Feedback mechanism between the surface and the Arctic climate system will enhance the warming effect, while the ground ice in the Arctic is increasingly contributing to global sea level rise. Need to keep track of all the changes taking place in the Arctic, document them, to simulate changes in the cryosphere and their consequences. Permafrost temperature and thickness of the active layer , in spite of some differences in certain regions, have generally increased throughout the Arctic . [1]