Spectral instrumentation for monitoring atmospheric ozone at millimeter waves

Solomonov, S. V.; Ignat’ev, A. N.; Kropotkina, E. P.; Логвиненко, С. В.; Lukin, A. N.; Nikiforov, P. L.; Rozanov, S. B.

doi:10.1134/s0020441209020286

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…In terms of the basic parameters (sensitivity and accuracy of the ozone-profile recovery), the FIAN equipment corresponds to the world class for such instruments. [26] for quiet (a) and disturbed (b) ozonesphere. Model data from [27].…”

Section: Methods and Equipmentmentioning

confidence: 99%

“…Detailed description of the receiver which uses a planar Schottky-diode detector is given in [6,26]. Single-band noise temperature was about 700 K in the case of input-cascade cooling by liquid nitrogen and about 1500 K without cooling.…”

Section: Methods and Equipmentmentioning

confidence: 99%

“…Works on remote sensing of atmospheric ozone at millimeter waves are underway in Russia [4][5][6][7][10][11][12][13] and abroad (see, e.g., [3, 8, 9, and 14]). The FIAN spectral equipment, which allowed us to conduct regular long-term observations of vertical stratospheric and mesospheric distributions of ozone at millimeter waves, was included in the global ozonometric network in the international projects DYANA, CRISTA/MAHRSI, and SOLVE.…”

Section: Introductionmentioning

confidence: 99%

“…Multiple spectral lines of ozone, water vapor, chlorine monoxide, and some other gases playing a key role in atmospheric processes fall into this band. Radiophysical methods [3][4][5][6][7][8][9][10][11][12][13][14] allowed us to perform ground-based round-the-clock observation of the atmospheric natural thermal radio radiation over a wide altitude range under various weather conditions, since radiation attenuation in the clouds and aerosol layers in the radiofrequency range is much smaller than that in the optical spectrum. The ozonospheric radiophysical studies are aimed at studying the atmospheric-ozone variations due to the natural and technogenic effects under the changing climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Remote sensing of atmospheric ozone at millimeter waves

Solomonov

Gaikovich

Kropotkina

et al. 2011

Radiophys Quantum El

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UDC 551.510We present new results of remote sensing of the vertical distribution of ozone at millimeter waves using the FIAN (P. N. Lebedev Institute of Physics, Russian Academy of Sciences) highsensitivity spectroradiometer which includes a new 96-channel spectrum analyzer AS-96 with improved characteristics. The ozone radiation spectrum is recorded at a frequency of 142.2 GHz. Vertical profile of ozone is retrieved using an improved algorithm based on Tikhonov's method and statistical regularization technique. Specific features of the altitude-temporal distribution of ozone, which reflects ozonospheric processes above mid-latitudes are considered. Variations in the vertical distribution of ozone during major stratospheric warming in January 2009 are shown. It was concluded that the creation of a national ground-based network for ozone monitoring at millimeter waves in Russia is a must.

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Section: Methods and Equipmentmentioning

confidence: 99%

Section: Methods and Equipmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Remote sensing of atmospheric ozone at millimeter waves

Solomonov

Gaikovich

Kropotkina

et al. 2011

Radiophys Quantum El

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“…The analyzer has total bandwidth of 10.6 MHz, its channel widths increase from 0.1 MHz at the line center to 0.6 MHz at its band edges. As well, broadband 96-channel filter-bank spectrum analyzer [9] which is used at the LPI for regular ozone measurements [4] (total bandwidth of 475 MHz, channel widths increase from 0.1 MHz at the line centre to 20 MHz at its wings through intermediate steps of 0.2, 0.5, 2, and 5 MHz) may be the back-end of the new ozonometer.…”

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confidence: 99%

Transportable millimeter-wave spectrometer for monitoring of the atmospheric ozone

Rozanov

Shtanyuk

Bol’shakov

et al. 2013

2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves

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Ozone is one of the most important minor gas constituents of the atmosphere. Global depletion of the protective ozone layer in the last decades accompanied with such anomalous events as ozone holes in Antarctic and Arctic [1, 2] requires reliable long-term monitoring of ozone and ozone-related minor atmospheric gases from both satellites and ground level. Ground-based millimeter-wave (MMW) monitoring of atmospheric ozone is low-dependent on weather conditions, covers broad altitude region from the lower stratosphere to mesosphere, and is possible in day and night time [3,4]. These features of MMW measurements provide their advantages over traditional optical methods (UV spectrometers and lidars) and ozone sondes.A new transportable MMW spectrometer for ground-based monitoring of vertical distribution of atmospheric ozone (ozonometer) was designed and built at the LPI in cooperation with a number of leading scientific institutes of Russia. The instrument measures broadened spectral line of the atmospheric ozone thermal emission centered at 142.175 GHz (wavelength of 2.1 mm). Vertical ozone distribution in the stratosphere and mesosphere over point of observations (altitudes 12-75 km, up to 95 km at night) may be retrieved from the spectral line contour using special mathematical methods [4].The ozonometer consists of low-noise receiver, acousto-optical and filter-bank spectrum analyzers and PC with special software. The instrument may be operated in both automatic and manual mode. General view of the ozonometer is shown at Fig. 1. At present the instrument is placed at the LPI in Moscow before window closed with thin radio transparent polyethylene film. Elevation angle of antenna is selected at observations depending on weather conditions. Antenna pattern width is of 1.5° at -3 dB level [5].Room temperature heterodyne receiver [5] of the ozonometer is based on planar Schottky diode mixer [6, 7] and consists of optical and high-frequency blocks (Fig. 1, left). Optical block includes input Gaussian quasioptics [8], the mixer and local oscillator, corrugated horns to launch Gaussian beams, preamplifier of the first intermediate frequency (IF1) 3.5…4.0 GHz, and control interfaces. Quasioptical units are flat antenna mirror, chopper wheel of 200 mm diameter, room-temperature (hot) calibration load periodically placed across the signal beam, liquid nitrogen cooled reference load with brightness temperature varying from 85 K to 295 K by rotating wire grid, single sideband (SSB) filter, path length modulator to avoid distortions from standing waves, diplexer to combine signal and local oscillator beams and filtering local oscillator noise, and off-axis elliptic and parabolic mirrors for focusing Gaussian beams. Diameters of all apertures were selected to be no less than 4.5 w , where w is parameter of field distribution across main Gaussian mode [8]. The chopper wheel switches the receiver input between sky and the reference load with frequency of 30 Hz. The SSB filter and diplexer are Martin-Puplett interferometers. Meas...

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