24 results about "High latitude" patented technology

This invention discloses a projection function modeling method and system for geomagnetic soft partitioning and height perturbation correction. The method includes: acquiring puncture point observation samples; converting them to geomagnetic latitude and constructing periodic features; calculating the weights of low, middle, and high latitude sub-models using a soft partitioning mechanism with a fixed center and continuous weights; establishing the effective height function of each sub-model and weighted fusion to obtain the basic effective height; calculating the basic explicit projection function; inputting features into the data to drive the model, outputting the effective height correction, residual, and uncertainty; mapping the correction to an interpretable correction term based on sensitivity and combining it with the residual; and adaptively outputting the complete result or reverting to the basic model based on the uncertainty. This invention combines physical interpretability and data-driven capability, improving the accuracy, regional adaptability, and robustness of the projection function, and can be used for ionospheric delay correction in satellite navigation.

This invention discloses a high-precision inversion method for cloud microphysical parameters in high-latitude cold regions, belonging to the field of aviation meteorology and cloud physics detection technology. Addressing the problems of poor environmental adaptability, lack of error verification, and low accuracy in inverting parameters of large supercooled water droplets under the cold temperate vortex / frontal weather conditions of high latitudes (47°–53°N), this invention achieves high-precision inversion of liquid water content, effective particle radius, particle number concentration, and particle size distribution through five steps: raw data standardization, cold-region-specific instrument coefficient calibration, step-by-step inversion of core parameters, and multi-dimensional cross-validation. This invention significantly improves the accuracy and environmental adaptability of cloud microphysical parameter inversion in high-latitude cold regions by over 30% through extreme cold environment instrument coefficient correction, cold-region physical rationality verification, multi-probe cross-validation, and SLD large particle size distribution optimization strategies. It can directly support aviation meteorological icing warnings and aviation operational safety assurance, requires no additional hardware equipment, and is easy to deploy operationally.

The application provides an ionospheric delay estimation method considering non-absolute zero constraint in high latitude areas. The application introduces ionospheric piercing point data of multiple historical moments and multiple geographical positions; a linear ionospheric delay calculation model is constructed; the multiple historical moments and the multiple geographical positions are compared with a latitude threshold in sequence to obtain multiple high-latitude geographical positions of multiple historical moments and multiple low-latitude geographical positions of multiple historical moments; a low-latitude observation equation and a high-latitude observation equation are constructed; the low-latitude observation equation and the high-latitude observation equation are combined to obtain an optimized parameter vector of an ionospheric model considering non-absolute zero constraint in high latitude areas; each ionospheric piercing point data of each geographical position in real time is taken to calculate and output the optimized ionospheric delay of the real-time geographical position. The application has the advantages of obviously relieving the high-latitude anomaly of the Beidou Klobuchar model and significantly improving the correction performance of the Beidou Klobuchar model in the southern hemisphere.

The invention provides a converged communication gateway suitable for polar navigation. The converged communication gateway comprises a core control module, a 5G communication module, a multi-interface adaptation module, a network detection module, a data forwarding module, a position positioning module, a polar region signal enhancement module and a power supply module. The core control module pre-stores a maritime satellite coverage map, and automatically selects an active link according to the priority hierarchy of 5G priority, VSAT second priority and iridium bottom according to the real-time position and network state; and the differentiated cache duration is selected according to the switching type during switching, so that the data integrity is guaranteed. According to the invention, communication seamless switching in near-shore, medium-low-latitude ocean and high-latitude areas is realized, and communication continuity, adaptability and cost economy are guaranteed.

The application discloses a prediction method for radiation refrigeration capacity by using aerosol optical thickness and precipitable water amount, comprising the following steps: S10, obtaining corresponding hourly weather data according to weather data; S20, judging whether the local latitude is greater than 33°, if yes, entering step S30, S30, calculating the local precipitable water amount (PWV H ) by using a high-latitude calculation method; if no, entering S40, S40, calculating the local precipitable water amount (PWV L ) by using a low-latitude calculation method; S50, calculating atmospheric radiation according to the calculated precipitable water amount (PWV H or PWV L ); S60, correcting the atmospheric radiation calculated in S50 according to the aerosol optical thickness in the weather data; and S70, calculating the radiation refrigeration capacity according to the atmospheric radiation corrected in S60.

The paper presents a high-latitude ionospheric scintillation intensity prediction method, belonging to the field of space weather monitoring and satellite navigation technology. The low-frequency trend item, high-frequency non-stationary item and residual item are generated by using the time series of high-latitude ionospheric phase scintillation factor. The high-latitude ionospheric scintillation intensity prediction model is constructed by using the ionospheric phase scintillation factor and the target physical characteristics. The prediction value is generated by using the low-frequency trend item to train the multivariate CNN-BiLSTM-Attention. The prediction value is generated by using the high-frequency non-stationary item and the residual item to train the single variable CNN-BiLSTM-Attention. The ionospheric scintillation intensity can be predicted by combining the trained high-latitude ionospheric scintillation intensity prediction model. The method can effectively improve the accuracy, stability and cross-station migration ability of multi-step prediction of scintillation in complex ionospheric environment, and provides a means for studying ionospheric disturbance law and improving the reliability of high-precision application of global navigation satellite system.

The application relates to a community life circle demarcation method and device based on multi-source big data. The method automatically extracts residential communities, public service facilities and urban road network feature information around a target community from multi-source big data such as Baidu, Gaode and other Internet maps, population heat maps and national "three surveys" data to make a planning base map, determines the optimal predicted path between the residential area and the public service facility area, obtains the predicted heat map image of the path in the planning base map in combination with the visited frequency of the public service facility area obtained by means of mobile phone signaling data, inputs the difference area, the residential area and the public service facility area into a boundary demarcation model to output the planning base map after boundary demarcation, and embeds the high-latitude information of the difference area into the boundary demarcation model for training, so that the life circle boundary can be more accurately demarcated, and different types of life circle boundaries such as five minutes, ten minutes, fifteen minutes and half an hour can be selected according to the use demand of users.

The present application relates to a kind of preparation methods for different characteristic Mars weathered layer simulation object, comprising: obtaining the chemical element information of real Mars weathered layer, selecting the brown red volcanic rock with approximate chemical characteristics as raw material and drying;The dry raw material is pulverized, classified and screened, and a plurality of particle size components are obtained;Design different types of target particle size grading, to simulate the typical mechanical properties of different regions on the surface of Mars, each grading can be used as dry state regolith sample.Add water or salt solution to dry state regolith sample, and form frozen sample by low temperature, to simulate high latitude or shallow ice frozen environment on Mars.In addition, secondary mineral powder can also be added to simulate the surface environment of Mars after acidification or salinization weathering, to realize more complex chemical characteristics demand.The present application is simple in process, suitable for mass production, and the simulation object and Mars weathered layer have good correspondence in chemical composition, physical and mechanical properties, and simulation regolith can be produced to cope with various working conditions.

The application provides an underwater visual image efficient reconstruction method and system based on implicit entropy learning, comprising: acquiring an input image, the input image being an original image collected by an underwater robot; performing feature extraction on the input image to obtain high-latitude features, extracting auxiliary features, and performing quantization operation on the high-latitude features and the auxiliary features; encoding the auxiliary quantized features to generate an auxiliary feature code stream, decoding and restoring the auxiliary quantized features, decoding and extracting potential context information, and fusing the context information into distribution prediction of the high-latitude quantized features by an implicit entropy modeling module; encoding the high-latitude quantized features to generate a high-latitude feature code stream; decoding and restoring the high-latitude feature code stream to obtain high-latitude quantized features, and performing feature decoding on the high-latitude quantized features by using a decoder to obtain a reconstructed image. The application can solve the problems of insufficient compression performance and poor reconstruction quality of traditional image compression algorithms in underwater complex environments.

The application provides an Arctic sea wave prediction method based on automatic fusion of sea ice density, and belongs to the technical field of weather prediction. The wind field data automatic acquisition system is established to ensure the continuity of the wind field driving data. The sea ice wave interaction optimization model is applied to dynamically adjust the IC4M2 sea ice wave parameterization scheme. The open boundary line is set in the high latitude sea area of the North Atlantic, and the radiation boundary condition algorithm is combined with the sponge layer absorption technology to process the boundary wave propagation. The WAVEWATCH III sea wave numerical model is started, the fourth-order precision finite difference discrete format is combined with the adaptive artificial viscosity control algorithm to calculate the Arctic sea wave field, and the sea wave prediction product business processing system is established, so that the technical problem of low accuracy of the Arctic sea wave prediction caused by the insufficient parameterization precision of the sea ice wave interaction is solved.

The application belongs to the technical field of computer information processing, and specifically discloses a high-latitude sailing chart projection selection and switching method. The application solves the problems of projection selection, coordinate system adaptation and switching link fragmentation in high-latitude sailing through a coherent technical path based on latitude selection projection, automatic coordinate system matching, switching judgment according to sailing state and smooth conversion execution. The application realizes the standardized selection of projection based on geographical latitude as an objective basis, overcoming the blindness of experience selection. Through automatic matching of projection and coordinate system, the problem of disconnection with the navigation system and the need for manual intervention is solved. By introducing a switching area and dynamically judging the timing according to real-time sailing information, the rigid boundary switching is transformed into a smooth transition linked with the sailing state. Finally, multiple isolated operations are integrated into a complete process driven by data and automatically connected, significantly improving the automation level, system adaptability and navigation reliability of high-latitude sailing.

The application provides a real-time satellite coverage calculation method and system based on an equal-area spherical grid, electronic equipment and a storage medium, and relates to the technical field of space mission planning. The method comprises the following steps: acquiring satellite orbit attitude parameters, extracting a visual axis direction and simplifying a visual axis trajectory into a plurality of discrete line segments along a time axis; initializing a nested structure pixel index of a target area based on a hierarchical rule of an equal-area spherical grid HEALPix; inputting the line segment data and the pixel index into a GPU, and decoding the pixel index into a direction vector in the GPU; calculating the intersection state of each pixel vector and a corresponding line segment in parallel in the GPU according to the satellite payload field of view shape, accumulating the coverage time; and outputting the coverage rate of the target area based on the coverage statistical result. The application eliminates high-latitude area distortion by using an equal-area grid, greatly reduces the calculation complexity by using a line segment trajectory approximation and GPU parallelism, and realizes high-precision calculation of a second-level real-time coverage rate of a user-drawn polygon.

The invention discloses a method for calculating a visible time period between a satellite and any area of the ground, relates to the technical field of visible time period calculation, and aims to solve the problems of orbit perturbation errors, low intensive transit efficiency and coverage blind areas in satellite visible time period calculation. Through three technical means of dynamic resistance correction, space-time clustering optimization and inter-satellite link cooperation, a resistance compensation mechanism fuses real-time change of atmospheric density and a satellite motion direction, an accumulative error of orbit prediction is corrected, and it is ensured that starting and ending moments of a visible window accurately correspond to an actual transit event; the space-time clustering algorithm performs grouping processing on dense transit satellites, so that repeated calculation of satellite coverage in the same time-space domain is avoided, and the large-scale constellation scheduling response time is remarkably shortened; the inter-satellite link cooperation mechanism breaks through the geometric limitation of single-satellite direct connection, indirectly covers the traditional blind area through the relay satellite, and improves the service continuity of high-latitude and complex terrain areas.

The application relates to the technical field of photovoltaic support, and discloses a photovoltaic support suitable for high-latitude mountain complex terrains, which comprises a bearing plate and a fixed frame, the fixed frame is arranged at the top of the bearing plate and is used for bearing photovoltaic components; after the photovoltaic components are installed outside the fixed frame, the stable limiting of the photovoltaic components can be realized through the fixed frame, laying a foundation for subsequent angle adjustment; and the bottom of the bearing plate is provided with a hollow disc. The photovoltaic support suitable for high-latitude mountain complex terrains is characterized in that the linear motion of the piston plate is converted into the rotation of the clamping jaw through the connecting rod, the clamping jaw is opened and closed, the clamping jaw can be in close contact with the inner wall of the stone gap when the clamping jaw is extended, the hollow box is stably fixed, the second hose can smoothly transmit gas to provide power for the movement of the piston plate, the overall structure is suitable for high-latitude mountain complex terrains, the stability and use reliability of the photovoltaic components after installation are ensured, the height and angle can be flexibly adjusted, and different use requirements can be met.

This invention discloses a high-precision integrated positioning method for polar unmanned surface vessels (USVs) that fuses BeiDou and inertial navigation, belonging to the field of integrated navigation and positioning technology for USVs. The method includes: acquiring and parsing BeiDou positioning status data of the polar USV; collecting inertial sensor measurement signals and constructing inertial navigation status estimation data; processing the above data in conjunction with polar high-latitude spatial coordinate system transformation rules to generate polar grid navigation spatial comparison data; processing the comparison data based on a multi-source data fusion algorithm to calculate fused position and attitude data; and generating an integrated positioning result based on the fused position and attitude data. This invention employs polar grid spatial projection and adaptive multi-source fusion processing with signal anti-interference capabilities, which can overcome the singularity of polar high-latitude coordinates and effectively shield against signal attenuation interference in complex environments.

This invention proposes a novel high-latitude navigation method based on the ECEF system, belonging to the field of high-precision navigation technology. This invention addresses the problems of low positioning accuracy and large error fluctuations in traditional grid coordinate system and transverse coordinate system navigation algorithms in high-latitude environments, as well as the navigation interference caused by meridian convergence and high-latitude dynamic effects. The steps of this invention include: establishing a transformation matrix between the geographic coordinate system and the geocentric-fixed coordinate system; establishing discrete navigation solution equations for attitude direction cosine matrix, velocity, and position in the geocentric-fixed coordinate system; establishing error equations for attitude error, velocity error, and position error in the geocentric-fixed coordinate system; performing an S-domain transformation based on the error equations and converting to the time domain to obtain an analytical expression for inertial navigation error in the geocentric-fixed coordinate system; and obtaining optimized high-latitude navigation results based on the oscillation and divergence characteristics of attitude and velocity errors presented by the analytical expression for inertial navigation error.

The application provides a fusion communication gateway suitable for polar navigation. The fusion communication gateway comprises a core control module, a 5G communication module, a multi-interface adaptation module, a network detection module, a data forwarding module, a position positioning module, a polar signal enhancement module and a power module. The core control module pre-stores a maritime satellite coverage map, and according to the real-time position and network state, the active link is automatically selected in the priority order of 5G first, VSAT second and Iridium last; when switching, the differentiated cache time length is selected according to the switching type to ensure data integrity. The application realizes seamless switching of communication in nearshore, mid-low latitude ocean and high latitude areas, and guarantees communication continuity, adaptability and cost economy.

This invention discloses a method for constructing a parameterized model of marine meteorological heat flux under the marine droplet effect. This invention relates to the field of marine meteorological numerical forecasting technology. It integrates localized multi-source data preprocessing, subdivides marine droplets by particle size and establishes heat exchange correlations, models wind speed intervals, and constructs a heat flux equation with multiple correction terms. Through localized calibration, multi-scenario verification, and dynamic optimization, the computational adaptability is improved. The advantages of this invention are: by subdividing marine droplets by particle size and establishing their heat exchange characteristics with wind speed and wave period, it constructs a droplet generation rate model with sea ice adjustment terms specifically for wind speed intervals. Simultaneously, it incorporates localized measured data calibration and a quarterly dynamic optimization mechanism, solving the shortcomings of traditional heat flux parameterized models that do not fully consider droplet particle size differences, dynamic changes in sea state, and the influence of mid-to-high latitude sea ice, leading to large calculation deviations in complex weather scenarios.

The application provides a method for improving the success rate of shipborne Beidou short message transmission in high-latitude sea area, which comprises the following steps: firstly, designing a coding dictionary, wherein the coding dictionary is composed of a state byte, a complete longitude byte, a complete latitude byte, a partial longitude byte and a partial latitude byte; secondly, encoding the original information to be transmitted by the message transmitting end according to the newly designed coding dictionary; thirdly, highly simplifying the message content and minimizing the message length; and fourthly, reducing the probability of error caused by interference and improving the success rate of message transmission.

The application discloses a kind of based on FY-3 / MERSI satellite data's nearshore sea ice remote sensing extraction method, comprising the following steps: S1, the MERSI image obtained is preprocessed, and only the MERSI image of sea ice and seawater is obtained;S2, according to the difference of sea ice and seawater in each channel spectral characteristics of MERSI image, establish nearshore sea ice remote sensing recognition algorithm, the precision and accuracy of nearshore sea ice remote sensing recognition algorithm are evaluated;S3, according to nearshore sea ice remote sensing recognition algorithm, the nearshore sea ice information is extracted from the MERSI image of each day;The daily sea ice data extracted in each month is averaged for 10 days and monthly, and sea ice ten-day product and monthly product are generated.The application can realize the automatic identification of high spatial resolution sea ice information in winter high latitude nearshore sea area.

The invention provides a high-latitude transfer alignment algorithm based on a factor graph, and belongs to the technical field of high-precision navigation. The invention aims to solve the problem that the traditional Kalman filtering method is difficult to deal with the strong nonlinearity and parameter coupling problem of high-dimensional regional navigation, so that the precision and robustness of transfer alignment are reduced. The method comprises the following steps: S1, modeling a high-latitude transfer alignment problem into a time sequence factor graph model; s2, calculating the posterior distribution probability of the system according to the time sequence factor graph model; s3, according to the posterior distribution probability, obtaining an error state estimation value of the sub inertial navigation relative to the main inertial navigation through maximum posterior estimation; and S4, correcting the navigation parameters of the sub inertial navigation according to the error state estimated value, and completing transfer alignment in the high-latitude environment.

A method and device for reducing cycle slip misjudgment during ionospheric scintillation in high latitude regions are proposed, which belongs to the field of space weather monitoring and satellite navigation technology. By analyzing the variation law between the total electron content rate of change index and the cycle slip detection value, it is found that the fluctuation range of the detection value increases with the increase of ROTI within a certain range. Based on this finding, a regional threshold model is proposed, which selects a fixed threshold under low scintillation conditions and constructs an adaptive cycle slip threshold detection model by quadratic fitting according to the relationship between ROTI and detection value under strong scintillation conditions. Then the model is verified by using continuous annual GNSS data of multiple high latitude stations. The proposed regional adaptive threshold model shows good stability and applicability under different intensity of ionospheric disturbances, effectively improving the accuracy and reliability of precise point positioning in high latitude regions.

This invention discloses a three-dimensional spatial discrete coding method and system based on cubic spherical topology, relating to the fields of geospatial information processing and three-dimensional discrete grid technology. It addresses the problems of high-latitude distortion, poor elevation dimension fusion, and low computational efficiency across scales and surfaces in existing coding systems. This invention establishes a geocentric coordinate system and an Earth reference ellipsoid model, transforming and separating the spherical position and elevation components of the target point. After cubic mapping, nonlinear tangent transformation, fixed-point quantization, and three-dimensional Morton interleaving, it combines dynamic sentinel positions to form a 64-bit unsigned integer code, which can be quickly deconstructed and hierarchically analyzed using tail-zero counting. This invention effectively avoids high-latitude projection distortion, achieves native three-dimensional spatial fusion, supports cross-scale recursive addressing and O(1) complexity cross-surface neighborhood resolution, and is suitable for the efficient organization and retrieval of global three-dimensional spatial data.

A second monitoring device includes a +X+Y sensor (11S) directed at +45 degrees, a +X−Y sensor (12S) directed at −45 degrees, a −X+Y sensor (13S) directed at +135 degrees, and a −X−Y sensor (14S) directed at −135 degrees. When flying northeastward, the second monitoring device monitors airspace above high latitudes in the Northern Hemisphere with the +X−Y sensor (12S), and monitors airspace above high latitudes in the Southern Hemisphere with the −X+Y sensor (13S). When flying southeastward, the second monitoring device monitors airspace above high latitudes in the Northern Hemisphere with the −X−Y sensor (14S), and monitors airspace above high latitudes in the Southern Hemisphere with +X+Y sensor.