CN115826088A - Laser heterodyne spectroscopy measurement method and system for vertical wind profile in the middle and upper atmosphere - Google Patents

Abstract

The invention relates to the field of atmospheric measurement optics, and discloses a laser heterodyne spectrum measurement method for the vertical wind profile of the middle and upper atmosphere, including: obtaining the atmospheric simulation absorption spectrum according to the established forward modeling model; using the laser heterodyne method to obtain high-quality atmospheric molecules The absorption spectrum data; According to the forward modeling model and the absorption spectrum data, the inversion model of the atmospheric vertical wind profile is established; according to the solution of the minimization of the inversion model, the atmospheric vertical wind profile is obtained, and the actual measurement of the present invention The high-resolution CO2 heterodyne absorption spectrum of atmospheric molecules, the study of the forward model and the atmospheric wind field inversion method suitable for laser heterodyne detection, and the inversion of the middle and upper atmospheric wind profiles can not only be used for the atmospheric wind profile The study of telemetry and evolution law provides necessary measurement means, and can also provide more comprehensive and accurate basic data for atmospheric climate model research, and promote the scientific understanding of the impact of atmospheric wind field on global climate.

Description

Laser heterodyne spectroscopy measurement method and system for vertical wind profile in the middle and upper atmosphere

technical field

The invention relates to the technical field of atmospheric measurement optics, in particular to a laser heterodyne spectrum measurement method for the vertical wind profile of the middle and upper atmosphere.

Background technique

Accurate detection of wind profiles in the middle and upper atmosphere (20-100km) is of great significance for understanding the formation mechanism, occurrence, development and movement of weather phenomena. The predictive power of changes and the accuracy of global numerical weather prediction (NWP) play an important role. In order to scientifically understand the impact of the upper and middle atmospheric wind profiles, it is first necessary to solve the problem of how to obtain the atmospheric wind profiles.

Before the middle of the 20th century, due to limited conditions, the atmospheric wind profile could only be obtained by simple direct detection methods, such as: cup anemometer, wing anemometer, katar thermometer and hot bulb electric anemometer, wind vane, etc., they Direct contact with the atmosphere to obtain wind speed information. However, these devices have limited ability to detect large-scale and large-scale wind profiles. In the middle and late 20th century, with the rapid development of laser technology, microwave technology, and information processing technology, remote sensing detection gradually developed into an important detection method in the field of earth atmosphere research. Different from the direct detection of the atmospheric wind profile, the remote sensing detection of the atmospheric wind profile means that the atmospheric wind profile detector does not directly contact the measured atmosphere, and the radiation waves emitted by it, such as light waves, electromagnetic waves or sound waves, propagate in the atmosphere. When the radiation wave interacts with the material carrying the wind profile information, the frequency spectrum and phase of the radiation wave signal will also change accordingly. Finally, the wind speed and wind direction information can be obtained through the inversion of the echo signal.

Atmospheric wind profile telemetry technology can be divided into active wind profile telemetry and passive wind profile telemetry. Active wind profile telemetry technologies mainly include Doppler sodar, Doppler microwave radar, and Doppler lidar. Doppler sodar mainly detects the atmospheric wind profile in the boundary layer, and can measure the wind profile from tens of meters to one thousand meters. However, Doppler sodar has a short range and is basically no longer used in remote sensing measurements. Doppler microwave radar has been widely used in the telemetry of atmospheric wind profile. It interacts with large-sized particles in the atmosphere, such as clouds, rain, ice, or heterogeneous bodies in the atmosphere to generate echoes, while interacting with some small When large-scale atmospheric molecules interact with aerosols, echo signals are basically not generated. Therefore, Doppler microwave radar has a strong remote sensing detection ability under cloudy, rainy and snowy weather conditions, but under the conditions of clear sky, uniform atmosphere or low aerosol distribution density, detection blind spots will be formed. In addition, for Doppler microwave radar, because of its huge transceiver system, it is not suitable for airborne and spaceborne telemetry.

Doppler lidar uses laser as the carrier signal, which can interact with molecules and aerosol particles in the atmosphere to generate echo signals. It is currently the best technical means to achieve global and all-weather wind profile telemetry. Compared with Doppler sodar and Doppler microwave radar, Doppler lidar has high spatio-temporal resolution, high clear-sky measurement accuracy, fast response, large detection range (extendable to the low thermal layer), and can obtain three-dimensional profiles simultaneously. The advantages of wind speed and wind direction distribution in the line. The vertical effective area of Doppler lidar wind measurement is from the ground to an altitude of 20km, and the vertical resolution is 1km. Infrared Doppler LiDAR is widely used in wind profile telemetry in small areas. However, Doppler lidar is based on the active detection of the medium by a powerful light source (laser). If you want to obtain a higher-level wind profile, it means that the weight, volume and power consumption of the instrument itself will be greatly increased.

Passive wind profiler telemetry technology mainly includes Fabry-pérot interferometer (FPI), Michelson interferometer and Doppler asymmetric space heterodyne (DASH), which are deployed on ground or spaceborne platforms. FPI wind profile detection technology obtains wind speed by accurately measuring the center and radius of interference fringes. In 1991, the High Resolution Doppler Imager (HRDI) carried by the URAS satellite realized wind profile detection in the stratosphere, middle layer and lower thermosphere. In the following years, the United States and Japan used small ground-based FPIs to study thermospheric winds and temperatures. In addition, Wang et al. also reported a ground-based FPI to obtain the upper atmospheric wind profile by combining the measured data with an inversion algorithm by using a band-pass filter behind the etalon and Galileo telescope system.

Different from the principle of FPI, Michelson interferometer realizes the detection of wind profile by measuring the phase change of interference fringes. The wind imaging interferometer is the first spaceborne instrument that uses Michelson interferometer technology to achieve passive profile detection, and has successfully detected atmospheric profiles within the altitude range of 80-300km. DASH technology is developed on the basis of spatial heterodyne spectroscopy technology, and it is a new technology developed for the specific application of middle and upper atmospheric wind profile detection. In 2013, Solheim and Shepherd of the University of York developed a SWIFT-DASH principle prototype for stratospheric wind profiling and infrared ozone detection. Recently, Shen et al. analyzed the processing error of Doppler asymmetric spatially heterodyned measurement data.

The atmospheric profile is affected by many factors (such as atmospheric environment, latitude and longitude, temperature, pressure, etc.), and the atmospheric profile varies greatly at different locations and at different times. To scientifically and accurately detect middle and upper atmospheric wind profiles, it is necessary to obtain atmospheric wind profile information in various geographical environments. This requires that the measuring instrument must have the characteristics of small size, light weight, low power consumption, low cost, and easy movement on the basis of ensuring performance. The above-mentioned atmospheric wind profile measurement instruments have been difficult to meet these requirements, and a new generation of atmospheric wind profile telemetry technology needs to be developed.

Contents of the invention

The object of the invention is to provide the laser heterodyne spectral measurement method of the vertical wind profile of the middle and upper atmosphere, to solve the following technical problems:

How to provide a method for measuring the vertical wind profile of the middle and upper atmosphere based on laser heterodyne method.

The purpose of the present invention can be achieved through the following technical solutions:

A laser heterodyne spectral measurement method for vertical wind profiles in the middle and upper atmosphere, including:

Obtain the atmospheric simulation absorption spectrum according to the established forward modeling model;

Using laser heterodyne method to obtain absorption spectrum data of high-quality atmospheric molecules;

Establishing an inversion model of the atmospheric vertical wind profile according to the forward modeling model and the absorption spectrum data;

An atmospheric vertical wind profile is obtained from minimizing the solution of the inversion model.

As a further solution of the present invention: the method for establishing the forward modeling model includes:

Using FASCODE's atmospheric stratification method to stratify the middle and upper atmosphere;

determining an atmospheric model based on said actual atmospheric parameters;

Calculation of molecular species absorbed by atmospheric molecules, determination of solar transport paths;

Use the line-by-line integration algorithm LBLRTM to calculate atmospheric molecular absorption and continuous absorption;

Obtain the optical thickness corresponding to different wavelengths of light and the atmospheric transmittance on the horizontal path and the oblique path;

Calculate the total optical thickness of each layer by using the calculated optical thickness, and calculate the parameters required by DISORT;

Call DISORT to calculate single scattering and multiple scattering, and get the calculation results of atmospheric thermal radiation;

Scattered radiation on the oblique path is obtained according to the atmospheric thermal radiation.

As a further solution of the present invention: the acquisition method of the absorption spectrum data includes:

capture sunlight that travels through the atmosphere to the Earth's surface;

Obtaining the atmospheric vertical wind profile by analyzing the atmospheric molecular absorption spectrum line pattern of the sunlight;

A near-infrared laser with a preset central wavelength is selected to obtain a heterodyne spectrum signal to obtain the absorption spectrum data.

As a further solution of the present invention: the method for establishing the atmospheric vertical wind profile inversion model includes:

performing comparative analysis of spectral line shapes according to the atmospheric simulation absorption spectrum calculated by the absorption spectrum data and the forward modeling model, and obtaining the inversion of the vertical wind profile of the atmosphere;

The inversion of the atmospheric vertical wind profile includes:

Consider the radiative transfer model and the Doppler distortion of the absorption spectrum:

为在波长

处垂直路径的归一化光学深度，

为实测大气透过率，θ为太阳天顶角，ρ(z)为假设CO2分子的密度，U(z)为假设大气风在视线上的垂直廓线，c为光速，

为吸收线中心波长，

为根据上述算法计算的每个分子在波长

和高度z处的模型吸收截面；in,

for the wavelength

The normalized optical depth of the vertical path at ,

is the measured atmospheric transmittance, θ is the solar zenith angle, ρ(z) is the density of hypothetical CO2 molecules, U(z) is the vertical profile of the hypothetical atmospheric wind on the line of sight, c is the speed of light,

is the central wavelength of the absorption line,

For each molecule calculated according to the above algorithm at the wavelength

and the model absorption cross section at height z;

Construct the following function according to the maximum entropy method (MEM):

ε＝0.001，且满足该近似性质|Ω_ε(U)-Ω(U)|<εk，k为常数；Among them, the function g(U) is introduced to provide the convexity of the function Ω _ε (U), g(U) is a smooth function, the form is

ε=0.001, and satisfy the approximate property |Ω _ε (U)-Ω(U)|<εk, k is a constant;

上搜索解；in the compact set

Search for solutions on the Internet;

According to the generalized residual regularization method (GRM) means introducing a stable functional function Ω(U,ρ) which is physically reasonable and obeys special properties such as concavity and semi-continuity to provide convergence sexual method.

Constrained minimization of the stable function:

The regularization standard is selected, and the sequential quadratic programming (SQP) algorithm is used for iterative calculation to obtain the solution of the minimum stability function and the inversion model of the atmospheric vertical wind profile.

As a further solution of the present invention: the laser heterodyne spectral measurement system of the vertical wind profile of the middle and upper atmosphere, comprising:

The atmospheric simulation absorption spectrum acquisition module is used to obtain the atmospheric simulation absorption spectrum according to the established forward modeling model;

The high-quality absorption spectrum data acquisition module is used to obtain the absorption spectrum data of high-quality atmospheric molecules;

A building block for establishing an inversion model of the atmospheric vertical wind profile according to the forward modeling model and the absorption spectrum data;

The processing module is used for obtaining the vertical wind profile of the atmosphere according to the solution of the minimization of the inversion model.

Beneficial effects of the present invention: the present invention is based on the ground-based near-infrared laser heterodyne experimental system established in the laboratory, the high-resolution CO2 heterodyne absorption spectrum of atmospheric molecules actually measured, and the forward model and atmospheric wind suitable for laser heterodyne detection are studied. The field inversion method realizes the inversion of the middle and upper atmospheric wind profile and the online measurement of its evolution characteristics with time and place, thus laying the foundation for the development of global and all-weather wind field telemetry. The scheme adopted in this application can not only provide the necessary measurement means for the remote measurement of the atmospheric wind profile and the study of its evolution law, but also provide more comprehensive and accurate basic data for the study of the atmospheric climate model, and promote the influence of the atmospheric wind field on the global climate. The level of scientific cognition of the influence and so on.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the schematic diagram of laser heterodyne spectrum measuring method among the present invention;

Fig. 2 is a schematic structural diagram of a high-quality absorption spectrum data acquisition module in the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to shown in Fig. 1, the present invention is the laser heterodyne spectral measurement method of middle and upper atmosphere vertical wind profile, comprising:

Obtain the atmospheric simulation absorption spectrum according to the established forward modeling model;

Using laser heterodyne method to obtain absorption spectrum data of high-quality atmospheric molecules;

Establishing an inversion model of the atmospheric vertical wind profile according to the forward modeling model and the absorption spectrum data;

An atmospheric vertical wind profile is obtained from minimizing the solution of the inversion model.

In the present invention, the advantage of laser heterodyne spectroscopy is mainly that the weak sunlight carrying the absorption spectrum information of atmospheric molecules after passing through the atmosphere is amplified by a relatively high-power local laser, thereby obtaining the absorption spectrum of atmospheric molecules with high sensitivity and high resolution. . Ideally, when the local oscillator laser power is high enough, the signal-to-noise ratio of the laser heterodyne system is close to the signal-to-noise ratio under the shot noise limit, and the spectral resolution of the system is determined by the electronic bandwidth of the subsequent radio frequency circuit, which can reach several MHz. In addition, the optical path system of the laser heterodyne system is relatively simple and stable, and can be realized in a small space.

Because the wind speed and direction of the wind field at different heights are different, affected by Doppler broadening, the center frequency and absorption line shape of the atmospheric molecular absorption spectrum at different heights will change. When the atmospheric wind field, temperature, pressure and other atmospheric parameters have changed When the time is known, the absorption line shape of atmospheric molecules at a certain altitude can be determined. Conversely, the CO2 absorption spectrum measured by the ground-based laser heterodyne system after the action of the middle and upper atmospheric wind field can be used to invert the upper and middle atmospheric wind profiles at different heights based on the CO2 absorption spectrum line shape.

As a further solution of the present invention: the method for establishing the forward modeling model includes:

Using FASCODE's atmospheric stratification method to stratify the middle and upper atmosphere;

Determine the atmospheric model according to the actual atmospheric parameters; or use manual entry of atmospheric parameter profiles under real conditions (detailed gas composition, a priori estimated vertical concentration profile, pressure, temperature, wind field, etc.);

Then combine the latest version of the HITRAN2016 database to calculate the molecular species absorbed by atmospheric molecules and determine the solar transmission path;

Use the line-by-line integration algorithm LBLRTM to calculate the absorption and continuous absorption of atmospheric molecules; select the aerosol calculation mode to calculate the aerosol attenuation;

Obtain the optical thickness corresponding to different wavelengths of light and the atmospheric transmittance on the horizontal path and the oblique path;

Use the calculated optical thickness to calculate the total optical thickness of each layer, and calculate the parameters required by DISORT; call DISORT to calculate single scattering and multiple scattering, and obtain the calculation results of atmospheric thermal radiation; obtain according to the atmospheric thermal radiation Scattered radiation on an oblique path. In the process of establishing the forward model using the line-by-line integration algorithm (lblrtm), adding the DISORT scattering algorithm can further improve the inversion accuracy of the vertical profile of greenhouse gases.

As a further solution of the present invention: the acquisition method of the absorption spectrum data includes:

capture sunlight that travels through the atmosphere to the Earth's surface;

Obtaining the atmospheric vertical wind profile by analyzing the atmospheric molecular absorption spectrum line pattern of the sunlight;

A near-infrared laser with a preset central wavelength is selected to obtain a heterodyne spectrum signal to obtain the absorption spectrum data.

As a further solution of the present invention: the method for establishing the atmospheric vertical wind profile inversion model includes:

performing comparative analysis of spectral line shapes according to the atmospheric simulation absorption spectrum calculated by the absorption spectrum data and the forward modeling model, and obtaining the inversion of the vertical wind profile of the atmosphere;

The inversion of the atmospheric vertical wind profile includes:

Consider the radiative transfer model and the Doppler distortion of the absorption spectrum:

为在波长

处垂直路径的归一化光学深度，

为实测大气透过率，θ为太阳天顶角，ρ(z)为假设CO2分子的密度，U(z)为假设大气风在视线上的垂直廓线，c为光速，

为吸收线中心波长，

为根据上述算法计算的每个分子在波长

和高度z处的模型吸收截面；in,

for the wavelength

The normalized optical depth of the vertical path at ,

is the measured atmospheric transmittance, θ is the solar zenith angle, ρ(z) is the density of hypothetical CO2 molecules, U(z) is the vertical profile of the hypothetical atmospheric wind on the line of sight, c is the speed of light,

is the central wavelength of the absorption line,

For each molecule calculated according to the above algorithm at the wavelength

and the model absorption cross section at height z;

Construct the following function according to the maximum entropy method (MEM):

ε＝0.001，且满足该近似性质|Ω_ε(U)-Ω(U)|<εk，k为常数；Among them, the function g(U) is introduced to provide the convexity of the function Ω _ε (U), g(U) is a smooth function, the form is

ε=0.001, and satisfy the approximate property |Ω _ε (U)-Ω(U)|<εk, k is a constant;

上搜索解；in the compact set

Search for solutions on the Internet;

According to the generalized residual regularization method (GRM) means introducing a stable functional function Ω(U,ρ) which is physically reasonable and obeys special properties such as concavity and semi-continuity to provide convergence sexual method.

Constrained minimization of the stable function:

The regularization standard is selected, and the sequential quadratic programming (SQP) algorithm is used for iterative calculation to obtain the solution of the minimum stability function and the inversion model of the atmospheric vertical wind profile. By combining the laser heterodyne method to obtain high-quality spectral data of the actual atmospheric molecules in the whole layer, the precise measurement of the vertical wind profile in the middle and upper atmosphere is realized by using the generalized residual regularization criterion (GRM).

As shown in Figure 2, the laser heterodyne spectral measurement system for the vertical wind profile of the middle and upper atmosphere includes:

The atmospheric simulation absorption spectrum acquisition module is used to obtain the atmospheric simulation absorption spectrum according to the established forward modeling model;

The high-quality absorption spectrum data acquisition module is used to obtain the absorption spectrum data of high-quality atmospheric molecules;

A building block for establishing an inversion model of the atmospheric vertical wind profile according to the forward modeling model and the absorption spectrum data;

The processing module is used for obtaining the vertical wind profile of the atmosphere according to the solution of the minimization of the inversion model.

In the present invention, the all-fiber portable near-infrared laser heterodyne wind profile detection system acquires atmospheric wind field information through passive telemetry using sunlight as signal light, and obtains larger spatial scales in real time and on the spot in a form of small volume and low power consumption. The range of atmospheric wind field information overcomes the shortcomings of the existing middle and upper atmospheric wind field detection technology equipment, which are bulky and difficult to move, and has higher practicability and convenience.

The detection of atmospheric components by laser heterodyne detection method is a passive detection method using sunlight as signal light. The sunlight passes through the atmosphere and reaches the surface of the earth, which carries the absorption information of various molecules in the atmosphere. The vertical wind profile of the atmosphere can be obtained by analyzing the high-resolution atmospheric molecular absorption spectrum line pattern by Doppler. A near-infrared laser heterodyne system with a central wavelength of 1.605mm is proposed to detect atmospheric CO2 molecules. In this band, CO2 molecules are less disturbed by the absorption of other atmospheric molecules, so more accurate CO2 molecular absorption line shape information can be obtained.

The schematic diagram of the designed experimental system is shown in Figure 2. The sun's position is tracked in real time by a sun tracker with high pointing accuracy. The fiber-coupled collimating lens installed on the sun tracker is used to collect sunlight and collect it into a long single-mode optical fiber. The intensity of sunlight emitted from the optical fiber is modulated by a 1×2 fiber-coupled optical switch, and a part of the sunlight emitted from the optical switch directly enters the optical power detector to calibrate the variation of the sunlight power. The laser beam emitted by the local oscillator laser is divided into two beams through the fiber beam splitter, and a part of the laser beam is combined with the sunlight modulated by the optical switch intensity through the fiber coupler, and the optical mixing is carried out on the photosensitive surface of the mixer. The DC signal and difference frequency signal generated after frequency mixing pass through the RF filter, RF amplifier, and power detection through the RF power detector, and finally sent to the lock-in amplifier combined with the synchronous reference signal output by the optical switch for correlation demodulation, and Output the final heterodyne signal, use the function generator to generate a sawtooth wave signal to drive the laser for wavelength scanning, so as to obtain a complete heterodyne spectrum signal; another part of the laser beam split by the fiber beam splitter passes through the fiber collimator and then passes through the optical After the etalon and the absorption cell enter the photodetector for frequency calibration. The data acquisition card collects these signals and displays them on the notebook computer through the Labview simulation software. Among them, when optimizing the parameters of the system, the black body optical path will be used to replace the sunlight optical path.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (5)

1. The laser heterodyne spectrum measurement method for the vertical wind profile of the middle-high atmosphere is characterized by comprising the following steps of:

obtaining an atmospheric simulation absorption spectrum according to the established forward model;

acquiring absorption spectrum data of high-quality atmospheric molecules by using a laser heterodyne technology;

establishing an inversion model of the atmospheric vertical wind profile according to the forward model and the absorption spectrum data;

obtaining an atmospheric vertical wind profile from minimizing a solution of the inverse model.

2. The laser heterodyne spectroscopy measurement method for the vertical wind profile of the middle-high atmosphere according to claim 1, wherein the forward model establishing method comprises:

layering the middle and high atmospheric layers by using an atmospheric layering method of FASCODE;

determining an atmospheric mode according to the actual atmospheric parameters;

calculating the molecular species absorbed by atmospheric molecules, and determining a solar transmission path;

calculating atmospheric molecular absorption and continuous absorption by using a line-by-line integration algorithm LBLRTM;

obtaining optical thicknesses corresponding to different wave numbers and atmospheric transmissivity on a horizontal path and an inclined path;

calculating the total optical thickness of each layer by using the calculated optical thickness, and calculating to obtain parameters required by DISORT;

calling DISORT to calculate single scattering and multiple scattering to obtain a calculation result of atmospheric thermal radiation;

and acquiring scattered radiation on an inclined path according to the atmospheric thermal radiation.

3. The laser heterodyne spectrometry method for measuring the vertical wind profile of the middle-high atmosphere as claimed in claim 1, wherein the acquisition mode of the absorption spectrum data comprises:

obtaining sunlight which passes through the atmosphere to the earth surface;

obtaining an atmospheric vertical wind profile by analyzing the atmospheric molecular absorption spectral line profile of the sunlight:

and selecting near-infrared laser with a preset central wavelength, and acquiring heterodyne spectrum signals to obtain the absorption spectrum data.

4. The laser heterodyne spectroscopy measurement method for the vertical wind profile of the middle and upper atmosphere according to claim 1, wherein the method for establishing the inversion model of the vertical wind profile of the atmosphere comprises:

performing spectral line type comparison analysis according to the absorption spectrum data and the atmospheric simulation absorption spectrum calculated by the forward model to obtain inversion of atmospheric vertical wind profile;

the inversion of the atmospheric vertical wind profile comprises:

consider the radiation transmission model and the doppler distortion of the absorption spectrum:

wherein H is the height of the middle and upper atmospheric layers,

to be at wavelength

At the normalized optical depth of the vertical path,

to measure the atmospheric transmittance, θ is the zenith angle of the sun, ρ (z) is the density of the assumed CO2 molecule, U (z) is the vertical profile of the assumed atmospheric wind on the sight line, c is the speed of light,

in order to absorb the center wavelength of the line,

for each molecule calculated according to the algorithm described above at wavelength

And a model absorption cross-section at height z;

the following function is constructed according to the maximum entropy method:

wherein a function g (U) is introduced to provide a function omega _ε Convexity of (U), g (U) is a smooth function of the form

And satisfies the approximate property | Ω _ε (U) -omega (U) | < epsilon k, k being a constant;

in the tight album

Searching for a solution;

regularization methods according to the generalized residual mean to introduce a stable harmonic function Ω (U, p) that is physically reasonable and follows special properties such as concavity and semicontinuousness to provide a convergent approach.

Constrained minimum stability function:

and selecting a regularization standard, and performing iterative computation by using a sequential quadratic programming algorithm to obtain a solution of the minimized stability function and obtain an inversion model of the atmospheric vertical wind profile.

5. Laser heterodyne spectral measurement system of perpendicular wind profile of middle and high-rise atmosphere, its characterized in that includes:

the atmosphere simulation absorption spectrum acquisition module is used for acquiring an atmosphere simulation absorption spectrum according to the established forward model;

the high-quality absorption spectrum data acquisition module is used for acquiring absorption spectrum data of high-quality atmospheric molecules;

the construction module is used for establishing an inversion model of the atmospheric vertical wind profile according to the forward model and the absorption spectrum data;

and the processing module is used for obtaining the atmospheric vertical wind profile according to the solution of the minimized inversion model.

Images