109 results about "Atmospheric layer" patented technology

The invention discloses a high-precision spectral remote sensing atmospheric correction and cloud removal processing method fusing multiple time phases, atmospheric parameters and ground reflectivity, and relates to the technical field of computer vision, deep learning image processing and remote sensing. Comprising the following steps: acquiring an atmosphere top reflectance and surface reflectance model of a Sentinel-2 satellite remote sensing image in a Guilin region, and constructing a data set by atmosphere data; constructing a diffusion model for multispectral remote sensing image processing; constructing a condition control and coding structure to carry out multispectral parameter and atmospheric parameter processing; and establishing a unified model to carry out atmospheric correction and cloud removal processing on the spectral satellite remote sensing image. According to the method, multi-temporal multi-spectral parameters, atmospheric aerosol optical thickness, atmospheric water vapor and ground reflectivity remote sensing characteristic parameters and data are fully fused, and a brand new unified model is established to realize atmospheric correction and cloud removal processing of a high-precision spectral satellite remote sensing image; and atmospheric correction and cloud removal processing of the high-precision spectrum satellite remote sensing image are realized.

The invention relates to the technical field of meteorological monitoring and lightning protection, and discloses a radio signal-based lightning protection detection method for a meteorological station, which comprises the following steps of: receiving electromagnetic wave signals generated by lightning discharge in real time through radio receiving equipment of a plurality of meteorological stations, and acquiring characteristic data of time, frequency and intensity of the signals; an effective light velocity model is adopted to correct the influence of the propagation velocity of the lightning signal in the atmosphere, and the effective propagation velocity of the lightning signal is calculated by considering the ionospheric and atmospheric refraction effects; the position of the lightning power supply is estimated by measuring the arrival time difference and the time difference of lightning signals received by different sites and utilizing the geometric positions of the multiple sites. The positioning precision of the lightning power supply is greatly improved by adopting the cooperative work of the radio receiving equipment of a plurality of meteorological stations and combining the technologies of accurate lightning signal propagation speed correction, time synchronization error correction, geometric precision optimization and the like.

The invention comprises an apparatus, method for using the apparatus and system for balloon altitude control by in-situ characterization and active energy management. The invention presented enables transportation, autonomous operation and use of a balloon beyond the limits of conventional high-altitude ballooning to the edge of the atmosphere, or about 100 km above the surface of the Earth. The apparatus comprises at least: an envelope containing lift-gas; an envelope and lift-gas characterizer; an altitude control system operated using active energy addition and lift-gas transfer or ambient air introduction into the system; and an external payload component. The invention is capable of operating in ascent, descent, or stationary mode; the altitudinal movement of the balloon is caused by measuring in-situ envelope and lift-gas characteristics, identifying the change in the lift-gas energy needed, and facilitating the required energy change for altitude control.

The invention belongs to the technical field of aerosol extinction, and relates to a CALIOP and Mie scattering laser radar combined aerosol extinction coefficient inversion method, which comprises the following steps of: calculating a first-order gradient according to a Mie scattering laser radar echo signal, and judging whether a strong positive and negative gradient pair layer exists or not according to whether a strong gradient exists in the first-order gradient; calculating the relative increase amplitude of the strong gradient, comparing the relative increase amplitude with a threshold value to judge the type of a strong positive and negative gradient pair layer, and setting an atmospheric boundary layer height range; a discrete wavelet covariance transformation function is adopted to invert the height of the atmospheric boundary layer, and in the Gaussian process machine learning network training process, scale factor parameters are selected for the discrete wavelet covariance transformation function so as to accurately invert the height of the atmospheric boundary layer; dividing the atmospheric layer into an atmospheric boundary layer and an atmospheric boundary layer top to a troposphere top according to the inversion atmospheric boundary layer height; according to the invention, the inversion precision of the aerosol extinction coefficient can be improved.

The invention relates to a near space non-uniform atmospheric refraction angle calculation method, which comprises the following steps: acquiring a deflection angle of light in the atmosphere, and obtaining a refraction angle model; determining atmospheric density change, obtaining a Boltzmann statistical model, and further obtaining a Boltzmann energy distribution model; determining molecular kinetic energy and potential energy, substituting the molecular kinetic energy and potential energy into a Boltzmann energy distribution model to obtain the atmospheric molecular number density away from the geocenter, and determining the change rule of the atmospheric molecular number density along with the altitude and the atmospheric temperature according to the atmospheric molecular number density away from the geocenter; acquiring a transmission path from the observation height to the top of the atmospheric layer, and acquiring the atmospheric temperature and atmospheric pressure at the observation height by combining the change rule of the atmospheric molecular number density along with the altitude and the atmospheric temperature; and inputting the atmospheric temperature and the atmospheric pressure at the observation height into an Elden refractive index model to obtain a refractive index value under a corresponding radiation condition, and inputting the refractive index value into a refraction angle model to obtain a refraction angle.

The invention provides a hyperspectral remote sensing data atmospheric correction method based on spectral smoothness. The hyperspectral remote sensing data atmospheric correction method comprises the steps of 1, generating a representative atmospheric parameter lookup table and atmospheric roof apparent spectral radiance; 2, constructing a deep learning network model to estimate the atmospheric aerosol optical thickness and the atmospheric column water vapor content initial value; and step 3, estimating the atmospheric aerosol optical thickness and the atmospheric column water vapor content based on the reflectivity spectrum smoothness, and performing atmospheric correction. According to the method provided by the invention, a novel method for estimating the optical thickness of the pixel-level atmospheric aerosol and the moisture content of the atmospheric column by using the hyperspectral remote sensing image is developed, and a novel method and system for obtaining the surface spectral reflectivity of the pixel by performing atmospheric correction are developed; therefore, a key method is provided for atmospheric correction of spaceborne hyperspectral remote sensing data in the wavelength range of 0.4-2.5 microns.

The invention provides a fixed star sight atmospheric refraction correction method for optical satellite limb observation, and the method comprises the steps: constructing an atmospheric ellipsoid model according to an earth atmosphere parameter set and earth ellipsoid parameters; according to the satellite orbit, the attitude measurement value, the image imaging time, the fixed star image plane coordinate and the satellite camera parameter, calculating the fixed star sight line; performing penetration layer atmospheric refraction correction on the fixed star sight line based on the atmospheric ellipsoid model to obtain a corrected first fixed star sight line; based on the atmosphere ellipsoid model, performing penetrating layer atmosphere refraction correction on the corrected first fixed star sight line to obtain a corrected second fixed star sight line; and calculating the right ascension and declination of the fixed star by using the corrected second fixed star sight line. According to the method, fixed star sight atmospheric refraction correction processing of optical satellite limb observation can be realized, so that support is provided for high-precision geometric processing of optical satellite limb observation images.

The invention provides an offshore area atmosphere and ocean parameter collaborative inversion method and system, and relates to the technical field of satellite remote sensing, and the method comprises the steps: obtaining to-be-inverted parameters which comprise an atmosphere parameter and an ocean parameter, calling a multi-parameter physical information neural network model to carry out the ocean water-leaving radiation calculation of the ocean parameter, and calculating the ocean water-leaving radiation of the ocean parameter; an atmospheric aerosol model is called to carry out parameterization calculation on atmospheric parameters, and scattering parameters and absorption coefficients of atmospheric aerosol are obtained; inputting the ocean water-leaving radiation quantity and the scattering parameter and the absorption coefficient of the atmospheric aerosol into a forward radiation transfer model, and carrying out radiation transfer calculation to obtain entrance pupil radiation brightness of the top of the atmospheric layer; and finally, performing parameter inversion by combining a satellite measurement radiation signal to obtain an inversion parameter corresponding to the to-be-inverted parameter. According to the invention, problems existing in an atmospheric correction algorithm for ocean water color remote sensing in the prior art are solved.

The invention discloses a deep learning inversion method and system based on physical constraint reflectivity, and an electronic device. The method comprises the following steps: constructing a deep neural network model; hyperspectral remote sensing sample data are input into the deep neural network model, and the transmittance product combination parameter sub-model, the atmospheric intrinsic reflectivity sub-model and the atmospheric hemisphere albedo sub-model are respectively subjected to model training by utilizing the hyperspectral remote sensing sample data; carrying out model training on the physical inversion model through a physical constraint formula; and S3, acquiring hyperspectral remote sensing data of the research area, inputting the hyperspectral remote sensing data into the deep neural network model, and predicting and outputting the atmospheric roof reflectivity. According to the method, the parameter model is innovatively constructed, the transmittance product combination parameter, the atmospheric intrinsic reflectivity and the atmospheric hemisphere albedo are respectively predicted by means of the parameter model, and the output atmospheric top reflectivity is efficiently and rapidly predicted based on the constructed physical radiation transfer equation by means of the three parameters. The method has the advantages of high prediction efficiency and high precision.

The invention relates to the technical field of atmospheric layer height detection, in particular to a coherent Doppler laser radar-based atmospheric boundary layer height identification and detection method, which comprises the following steps of: transmitting a laser beam through a coherent Doppler laser radar to obtain echo original radial wind speed data under different azimuth angles; performing inversion operation on the echo original radial wind speed data to obtain three-dimensional wind field information; horizontal wind speed is extracted from the three-dimensional wind field information, and turbulence intensity is obtained through calculation; and performing cubic root gradient calculation on the turbulence intensity, and selecting the height corresponding to the minimum value of the cubic root gradient calculation result, namely the height of the atmospheric boundary layer. According to the method, the accurate atmospheric boundary layer height with high time resolution and high spatial resolution can be obtained, so that the problems of large detection height limitation, poor continuity, poor time resolution, poor spatial resolution, limited deployment, low accuracy and the like in an existing atmospheric boundary layer observation mode are solved.

The invention provides an automobile skylight full-shading roller shutter composite fabric with a nine-functional-layer structure, and relates to the technical field of automobile textiles. The nine-functional-layer structure sequentially comprises a graphene far infrared emission yarn layer, a connection yarn layer, a rare earth far infrared absorption heating yarn layer, a first PUR connection point layer, a first aluminized heat reflection layer, a film layer, a second aluminized heat reflection layer, a second PUR connection point layer and an interior fabric layer from top to bottom. The woven fabric with the radiation cooling function and the composite fabric of the nine functional layers of the woven fabric have the capability of reversely emitting sunlight heat penetrating through skylight glass on the top of an automobile to the atmosphere outside the automobile and even the outer space through the skylight glass through absorption reflection and infrared radiation; and the aluminum-plated layer on the lower layer of the film can reduce the cold loss of a passenger compartment. The functions of cooling, heat insulation, cold insulation, shading, beautification and decoration of the nine-layer composite skylight roller shutter fabric for the vehicle are achieved through the effects of absorption, reflection and anti-radiation of infrared rays.

The invention comprises an apparatus, method for using the apparatus and system for balloon altitude control by in-situ characterization and active energy management. The invention presented enables transportation, autonomous operation and use of a balloon beyond the limits of conventional high-altitude ballooning to the edge of the atmosphere, or about 100 km above the surface of the Earth. The apparatus comprises at least: an envelope containing lift-gas; an envelope and lift-gas characterizer; an altitude control system operated using active energy addition and lift-gas transfer or ambient air introduction into the system; and an external payload component. The invention is capable of operating in ascent, descent, or stationary mode; the altitudinal movement of the balloon is caused by measuring in-situ envelope and lift-gas characteristics, identifying the change in the lift-gas energy needed, and facilitating the required energy change for altitude control.

The invention discloses an atmospheric high-resolution radiation transfer calculation method for greenhouse gases, which is used for simultaneously calculating absorption of molecules and scattering action and earth surface reflection of particulate matters with high spectral resolution, and comprises the following steps: acquiring atmospheric state parameters; doppler broadening, collision broadening and comprehensive broadening under the combined action of the Doppler broadening and the collision broadening are calculated, and the absorption coefficient of atmospheric molecules, the total optical thickness of the atmospheric molecules and light intensity attenuation caused by the absorption action are calculated; the scattering coefficient and the extinction coefficient of the particulate matter are calculated; integrating the land reflectance and the ocean reflectance to obtain global surface reflectance; the absorption of atmospheric molecules in the radiation transmission process and the attenuation of cloud and aerosol in the radiation transmission process are simulated, and the atmospheric roof radiance is obtained by combining the global surface reflectance simulation. Compared with an existing atmospheric radiation transmission model, the method has the advantages of high accuracy, high resolution and the like, is suitable for multiple scenes, and lays a foundation for satellite load forward modeling and inversion algorithm development.

The present invention discloses a real-time calibration method for the scattering channel of a spectroradiometer based on direct solar irradiance, which includes: obtaining the calibration values of the entire wavelength band of the direct channel of the spectroradiometer through a hybrid calibration method that combines the Langley calibration method in the non-absorbing wavelength band and the theoretical calculation of the solar irradiance at the top of the atmosphere in the strong absorption wavelength band; accurately obtaining the spectral irradiance reaching the optical acquisition system of the radiometer and the atmospheric transmittance through the calibration of the direct channel; using the measured direct solar radiation passing through the atmosphere and the atmospheric transmittance in real time, combining the solar irradiance at the top of the atmosphere and the optical component parameters of the instrument to obtain the real-time calibration values of the entire wavelength band of the scattering channel. Without using other auxiliary materials, the present invention transfers the calibration of the direct channel of the spectroradiometer to the calibration of the scattering channel, and will be applied to devices that simultaneously measure direct solar light and atmospheric scattered light.

The invention provides an atmosphere acquisition control method and system based on multi-source fusion, and belongs to the technical field of atmosphere acquisition, and the method comprises the steps: collecting the atmosphere parameters of a golden star, and forming an observation vector; obtaining an optimal state estimation vector, dynamically weighting each parameter in the optimal state estimation vector, and outputting a credible normalized fusion value; when the fusion value is higher than a preset fusion threshold value, opening a sampling port of the acquisition system to enable the Jinstar atmosphere to enter a cooling tank of the acquisition system; when the temperature is lower than a preset fusion threshold value or it is monitored that the cooling tank is full, a sampling opening is closed; cooling the cooling tank to solidify part of components of the gas sample, and transferring the residual gas to a gas storage tank of a collection system; vaporizing and discharging the solid sample in the cooling tank after the aircraft leaves the atmosphere; repeating the steps until sufficient samples are collected at the current target sampling height; and then executing an acquisition task of the next target sampling height. According to the invention, the success rate of the atmospheric sampling task and the sample effectiveness in the aventurine extreme environment are guaranteed.

The application discloses a method for inverting marine aerosol optical depth by using spaceborne lidar noise, belongs to the technical field of laser remote sensing, and is used for quantitatively inverting aerosol optical depth. Under the premise that system hardware parameters of the spaceborne lidar and total background noise data detected by the spaceborne lidar, environmental parameters of a corresponding region and moment are given, a noise model of solar radiation items corresponding to water surface white froth diffuse reflection and water surface specular reflection, a water-leaving noise model (a noise model of solar radiation items of water body backscattering), and an atmospheric noise model (a noise model of solar radiation items of Rayleigh scattering of atmospheric molecules and Mie scattering of aerosol particles) are respectively constructed. Water surface noise, water-leaving noise and atmospheric Rayleigh scattering noise are removed from total noise rate of the atmosphere top detected by the lidar, and aerosol scattering noise results are obtained. Finally, marine aerosol optical depth of a satellite transit region and moment is quantitatively inverted by using the aerosol scattering noise results and the aerosol scattering noise model.

Systems, devices, and methods for a gas sensor comprising one or more optical cells; a processor having addressable memory, the processor configured to: detect gas from the one or more optical cells of the gas sensor, where the detected gas is one or more of: methane, carbon dioxide, hydrogen sulfide, water, ammonia, sulfur oxides, and nitrogen; record data corresponding to the detected gas, where the recorded data comprises at least one of: an ambient temperature from a temperature sensor, an ambient pressure from a pressure sensor, an aerial vehicle telemetry, and an aerial vehicle location from a global positioning system (GPS); and generate a map of atmospheric greenhouse gas concentration on a map based on the detected gas and the recorded data.

The invention provides a greenhouse gas passive load atmospheric roof radiation simulation method and device. The method provided by the invention comprises the steps of determining a satellite radiation band based on spectral response characteristics of a satellite load and energy distribution characteristics of solar radiation; calculating a first radiation quantity after the initial solar radiation is modulated by the earth surface reflection by using the earth surface reflectance data under the radiation wave band; the total optical thickness of molecules is determined based on the Doppler broadening characteristic and the collision broadening characteristic of molecular absorption spectral lines under the radiation wave band and distribution of different molecular number densities in the atmosphere, and the first radiation attenuation of molecular absorption on the atmospheric roof is calculated; determining the optical thickness of the aerosol based on the scattering coefficient and the extinction coefficient of the aerosol particles under the radiation wave band and the distribution of the density of the aerosol particles in the atmosphere, and calculating the second radiation attenuation of the aerosol to the atmospheric roof; and subtracting the first radiation attenuation and the second radiation attenuation from the first radiation quantity to obtain the atmospheric top radiation intensity.

The invention discloses a bionic air-space cooperative atmosphere intelligent regulation and control system and method. The system comprises a twin digital earth, an atmospheric brain, an air-space AI mobile base comprising a troposphere special base and a stratosphere special base, a plurality of macroscopic telescopic pipelines, an array composed of macroscopic intelligent sunshade reflectors, and a multifunctional intelligent micro-unit cluster. A regulation and control strategy is generated through multi-source data assimilation and intelligent strategy optimization, physical states such as temperature and humidity of air masses in a pipeline are actively adjusted through an environment control section in a macroscopic telescopic pipeline, and low-energy-consumption, stepped and directional transportation of cloud water substances is achieved by actively utilizing the chimney effect formed by the atmospheric environment; controllable adjustment of solar radiation input is achieved through dynamic management of the intelligent sunshade reflector array. The system has four operation modes which can be evolved according to technical capability stages from macroscopic direct intervention to global intelligent collaboration, and is configured with a module recovery and platform stability anchoring mechanism so as to realize emergency intervention on disastrous weather.

The application discloses a kind of surface solar radiation prediction method and equipment based on satellite observation data, belong to solar radiation remote sensing prediction technical field.The method includes obtaining target observation data and prediction model;Difference is obtained by the target observation data of the adjacent observation time of each spectral channel of the top reflectivity of atmosphere layer, and cloud movement sensing feature is obtained;The input sequence that target observation data and cloud movement sensing feature jointly constitute is input into the prediction model, and the surface solar radiation prediction result is obtained.The application can realize more rapid, more continuous surface solar radiation short-term prediction, and reduce the dependence of intermediate inversion product and multi-source auxiliary data while maintaining good prediction accuracy in actual prediction stage, and has practical application value for solar energy resource monitoring, photovoltaic power generation power estimation and short-time power dispatching.

A floating craft control system that controls floating craft floating in the atmosphere. [Solution] This is a floating machine control system that controls a floating machine floating in the atmosphere. The floating machine has a power generation device that generates electricity using solar power, a power storage device that stores the electricity generated by the power generation device, a levitation device with balloons that use gas lighter than the atmosphere on the ground, and a propulsion device that uses the power from the power storage device to propel the machine through the air. Furthermore, the floating machine control system has a navigation control system that controls the levitation device and propulsion device and uses air currents in the atmosphere to move the machine to its destination.

The present invention relates to a shortwave radiation full-factor integrated remote sensing estimation method and system, wherein the method comprises: using the albedo of the acquired remote sensing observation data as the input of a pre-constructed simulation library, obtaining the radiation brightness of the blue, green and red bands at the top of the atmosphere or a certain height based on the atmospheric parameters in the simulation library; comparing the radiation brightness obtained by the simulation library with the radiation brightness of the acquired remote sensing observation data, and then matching the atmospheric parameters that meet the preset conditions in the simulation library according to the comparison result; and analyzing and obtaining the full elements of shortwave radiation according to the albedo and the atmospheric parameters that meet the preset conditions. The present invention proposes a new idea of ​​shortwave radiation full-factor integrated remote sensing estimation, which can realize the synchronous and high-precision estimation of 8 types of shortwave radiation through the radiation brightness data of simulation data and remote sensing data, and the present invention does not require atmospheric parameters such as cloud detection and aerosols, and is applicable to all weather and global scales.

This invention discloses a method for inverting atmospheric N2O column concentration based on thermal infrared satellite remote sensing, belonging to the field of atmospheric environment remote sensing technology. The method includes: acquiring and preprocessing satellite observation data; selecting a specific spectral range as the inversion characteristic spectral region; introducing a fast radiative transfer model to construct a forward simulation operator to simulate the radiance of the top atmospheric layer; selecting N2O-sensitive characteristic bands with high signal-to-noise ratio and low interference based on a channel optimization strategy using the N2O / CO2 Jacobi intensity ratio; constructing an extended state vector, using surface temperature as an unknown parameter and performing joint optimal estimation iterative inversion with the N2O profile to correct the surface temperature in the reanalysis data, thereby achieving high-precision inversion of N2O atmospheric column concentration. This invention transforms surface temperature from a fixed input parameter into a state variable to be inverted, effectively decoupling surface temperature error from the N2O signal, eliminating systematic bias, and significantly improving the inversion accuracy of N2O column concentration.

The invention discloses a control method and device for freezing rain prevention and control operation and a storage medium, and belongs to the technical field of power grid disaster prevention. The control method comprises the steps that under the condition that a thermal inversion layer exists in a target atmosphere area, a plurality of warm area target meteorological parameters of a thermal inversion layer warm area and a plurality of cold area target meteorological parameters of a thermal inversion layer cold area in the thermal inversion layer in the target atmosphere area are acquired; according to the multiple warm area target meteorological parameters and the multiple cold area target meteorological parameters, determining an early warning index corresponding to a thermal inversion layer; and under the conditions that the early warning index is greater than or equal to a preset early warning index threshold value, the plurality of warm region target meteorological parameters meet a preset warm region meteorological condition and the plurality of cold region target meteorological parameters meet a preset cold region meteorological condition, performing freezing rain prevention and control operation on the thermal inversion layer warm region and the thermal inversion layer cold region. The problem that in the prior art, the supercooled water drop phase change efficiency is low can be solved.

The invention provides an on-satellite on-orbit compensation method for an earth observation sight angle of an optical remote sensing satellite. The method comprises the following steps: acquiring an atmospheric refractive index of an optical wave band; obtaining the partial derivative of the atmospheric refractive index to the pressure intensity and the partial derivative of the atmospheric refractive index to the temperature, and obtaining the calculation precision of the atmospheric refractive index model according to the partial derivative of the atmospheric refractive index to the pressure intensity and the partial derivative of the atmospheric refractive index to the temperature; carrying out adaptive layering on the atmosphere according to the calculation precision of the atmospheric refractive index model to obtain adaptive height layer distribution of the atmosphere; and on the basis of the atmospheric layer adaptive height layer distribution, acquiring the line-of-sight angle deviation of the optical remote sensing satellite for earth observation by using a ray tracing method, and compensating the line-of-sight angle of the optical remote sensing satellite for earth observation according to the line-of-sight angle deviation of the optical remote sensing satellite for earth observation. According to the invention, the technical problem that the earth observation sight angle compensation method in the prior art cannot satisfy on-satellite in-orbit real-time high-precision calculation can be solved.

The invention belongs to the field of determination of a flight corridor speed-height boundary of a hypersonic flight vehicle returning and reentering the atmosphere, and particularly relates to a flight corridor speed-height boundary determination method of a flight vehicle returning and reentering the atmosphere, which comprises the following steps: step 1, calculating the flight corridor speed-height boundary of the flight vehicle returning and reentering the atmosphere, and determining the flight corridor speed-height boundary of the hypersonic flight vehicle returning and reentering the atmosphere; a flight corridor speed-height boundary constrained by boundary parameters; step 2, calculating a flight corridor speed-height boundary of a heat flow constraint when the aircraft returns to the atmosphere; step 3, calculating a flight corridor speed-height boundary of the aircraft returning to the atmosphere and constrained by dynamic pressure; 4, calculating a flight corridor speed-height boundary of overload constraint when the aircraft returns to the atmosphere again; and step 5, integrating the flight corridor speed-height boundary of the boundary parameter, the heat flow, the dynamic pressure and the overload constraint to obtain the flight corridor speed-height boundary of the aircraft returning and reentering the atmosphere.

The application discloses a micro-light target device and an absolute radiation calibration method for a spaceborne micro-light load, and adopts a light source which is industrialized and customized and meets corresponding conditions in terms of spectral energy stability, waveband response, light source emission energy stability, light source emission energy uniformity in each direction and light source power as a calibration light source of the target, so that the problem that the light source in the prior art has great uncertainty due to the influence of lamp temperature and the narrow spectral range cannot meet the full spectral range calibration requirement can be overcome. In addition, the application arranges multiple targets with different openings to form an absolute radiation calibration target array of the spaceborne micro-light load, so that multi-point and full waveband radiation calibration can be realized, and through the combination of the micro-light targets with different openings, the measured target radiance, the atmospheric profile and the aerosol content and other parameters, and the simulation of the entrance pupil radiance of the spaceborne micro-light load at the top of the atmosphere by means of a radiation transmission model, high-precision absolute radiation calibration of the spaceborne micro-light load with different spatial resolutions can be realized.

The utility model discloses a kind of dry gas seals for superhigh pressure gas injection centrifugal compressor, it is related to dry gas seal structure field, and it includes: shaft sleeve, primary sealing mechanism, it is sleeved in the outside of shaft sleeve, primary sealing mechanism has primary seal leakage port in communication with atmosphere side, secondary sealing mechanism, block process medium that leaks from primary sealing mechanism but is not discharged from primary seal leakage port to atmosphere layer;Primary sealing mechanism includes first dynamic ring and first static ring, secondary sealing mechanism includes second dynamic ring and second static ring, first dynamic ring and second dynamic ring are made of silicon nitride, first static ring and second static ring are made of silicon carbide, diamond coating is coated on the sealing end face of first static ring.The utility model is by being arranged as silicon nitride material to dynamic ring, it is arranged as silicon carbide material to static ring, and diamond coating is coated on the sealing end face of static ring, to reach the purpose that process medium enters atmosphere when gas injection pressure reaches 45Mpa, is blocked.

The present invention provides a method for constructing and looking up a Rayleigh scattering lookup table for the hyperspectral imager of the Environmental Disaster Reduction Satellite No. 2A / B to solve the problem that the existing Rayleigh scattering lookup table for water color satellite remote sensors is not applicable to the hyperspectral imager of the HJ-2A / B satellite and its accuracy is not high. According to the spectral response function of the hyperspectral imager of the HJ-2A / B satellite, this method calculates the solar irradiance at the top of the atmosphere, the Rayleigh scattering optical thickness of atmospheric molecules under standard atmospheric pressure, and the specific absorption coefficient of ozone per unit volume concentration, revises the anisotropic band difference of atmospheric molecules and the atmospheric pressure of the ocean-atmosphere coupled vector radiative transfer model, and calculates the Rayleigh scattering radiation vector under the equivalent Rayleigh scattering optical thickness of each band under different wind speeds and solar elevation angles, so as to generate a high-precision Rayleigh scattering lookup table for the hyperspectral imager of the HJ-2A / B satellite.

Method for establishing a bidirectional optical communication between a ground station (10) and a particularly geostationary satellite (14), to which a lead angle (PAA) is assigned, by which an uplink light beam (20) to be sent from the ground station (10) to the satellite (14) is offset from the direction of incidence of a downlink light beam (16) previously sent from the satellite (14) to the ground station (10), wherein in the method - a satellite (14) transmits a downlink light beam (16) through the atmosphere to a ground station (10) in a direction of incidence and - an orbital relay device (22) is provided, flying in the direction of movement (12) of the satellite (14) at a distance (24) behind the latter, which - receives an uplink light beam (20) sent by the ground station (10) and forwards it to the satellite (14) or - receives an uplink light beam (20) transmitted by the ground station (10) and transmits signals representing data of the uplink light beam (20) to the satellite (14) or - receives an uplink light beam (20) transmitted by the ground station (10) and transmits signals processed by the relay device (22) on the basis of data transmitted by the uplink light beam (20) to the satellite (14), - wherein the distance (24) between the satellite (14) and the relay device (22) is determined based on the difference in movement speed between the satellite (14) and the ground station (10) and on the distance of the satellite (14) from the ground station (10) and thus on the lead angle (PAA) assigned to the satellite (14), and - the uplink light beam (20) is transmitted from the ground station (10) to and received by the relay device (22) at a lead angle (PAA) of zero degrees and thus in a direction opposite to the direction of incidence of the downlink light beam (16).