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8057 results about "Meteorology" patented technology

Meteorology is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics, with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not occur until the 18th century. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at prediction of weather depended on historical data. It was not until after the elucidation of the laws of physics and more particularly, the development of the computer, allowing for the automated solution of a great many equations that model the weather, in the latter half of the 20th century that significant breakthroughs in weather forecasting were achieved. An important domain of weather forecasting is marine weather forecasting as it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water.

System and method for inland river bridge zone shipborne sailing active collision prevention

The invention provides a method for inland river bridge zone shipborne sailing active collision prevention. The method comprises the steps of collecting hydrological information, meteorological information and ship information of nearby ships and the ship, automatically updating river map information on line, and performing data storage; forecasting tracks of the ship and other ships according to obtained track information of the ship and other ships by combination with the real-time hydrological information and the meteorological information, and obtaining track information of every ship; calculating the nearest meeting distance and the nearest meeting time of the ship and a target object according to the obtained track information; and giving collision accident pre-warning and active collision prevention suggestions according to the nearest meeting distance and the nearest meeting time of the ship and the target object. According to the method, by predicating ship sailing situations, the shortcoming that an existing ship assistance navigation device cannot accurately obtain the position of the target object, and the nearest meeting distance and the reaching of the nearest meeting distance cannot be pre-judged more accurately is overcome.
Owner:湖南湘船重工股份有限公司

Method and apparatus for rejecting rain clutter in a radar system

InactiveUS6127965ADue to rain clutter are dramatically reducedReduces false alarmsRadio wave reradiation/reflectionPatch arrayRadar systems
A method and apparatus for detecting the presence of objects in a vehicle operator's blind spots. The apparatus comprises a side-facing Doppler radar system using continuous wave (CW) transmission with frequency modulation (FM) operation from a frequency modulation switching technique. The radar system determines the presence, range and closing rate of detected targets. The radar system detects targets even when operated in adverse weather conditions and will not generate false warnings due to rain clutter caused by wet roads and other wet surroundings. The radar system uses ranging techniques to reject false targets that are detected outside of a predetermined target detection zone. In accordance with the present invention, the radar system indicates that a target is detected if and only if any part of the target is within the detection zone and it: (1) remains in front of the antenna for at least TH1 seconds; (2) is at a range between Rangemin and Rangemax; and (3) is moving faster than Closing-Speedmin relative to the antenna. By rejecting targets that are closer than Rangemin feet to the antenna, false alarms due to rain clutter are dramatically reduced. Also, by rejecting targets that are further than Rangemax feet from the antenna, the radar system reduces false alarms caused by wet foliage and other wet "non-road" surroundings. In one embodiment, the radar system uses a patch array antenna oriented into a diamond-shape configuration to effectively create a natural linear amplitude taper that aids in rejecting clutter caused by wet road surfaces.
Owner:BENDIX COMML VEHICLE SYST LLC

Ground daily rainfall predicting method based on satellite remote sensing and regression Kriging

The invention discloses a ground daily rainfall predicting method based on satellite remote sensing and regression Kriging. The method comprises the steps that firstly, data are fast obtained through satellite remote sensing, and a regression relation among ground-based observation values, TRMM, DEMs and geographic positions of rainfall capacities of all levels is established according to the classification of the rainfall to obtain regression estimated values and regression residual errors of all levels; secondly, the spatial agglomeration degrees of the regression residual errors of all levels are analyzed, the trend removing is carried out on the regression residual errors, and the Kriging interpolation of the regression residual errors is carried out to obtain the regression residual error spatial distribution characteristics of all levels per 1 km; thirdly, the regression estimated values of all levels and the regression residual errors of all levels are added to obtain the ground-based predicting values of rainfall of all levels per 1 km; lastly, the ground-based predicting values of the rainfall of all levels are merged to obtain a daily rainfall predicting value per 1 km. According to the ground daily rainfall predicting method, the spatial and temporal distribution characteristics of the ground-based rainfall can be accurately predicted, the predicting precision of the ground daily rainfall is improved, the predicted space resolution is improved, and the key problem that the water conservancy department predicts the ground rainfall is solved.
Owner:ZHEJIANG UNIV

BDS/GPS high-accuracy positioning method

The invention discloses a BDS/GPS high-accuracy positioning method, relating to the field of satellite navigation. The method includes establishing a virtual reference station, acquiring the common-view satellite ephemeris and the satellite observation data received by a reference station Bi and a roving station M, and acquiring the geometry distance between the satellite and the reference station Bi; acquiring the pseudo range correction number of the reference station Bi; interpolating the pseudo range correction number of the virtual reference station by means of an algorithm of inverse distance to a power; interpolating the pseudo range correction number of the roving station by the roving station by means of an algorithm of inverse distance to a power; correcting the satellite pseudo range observation data received by the roving station by means of the pseudo range correction number of the roving station; and establishing a roving station satellite pseudo range observation equation to obtain the accurate coordinate of the roving station to complete the positioning. According to the invention, the safety hidden troubles of information leakage of the reference station because a multi-reference difference positioning method in the prior art must use the accurate coordinate of the reference station can prevented, and high-accuracy positioning is obtained.
Owner:CHINESE ACAD OF SURVEYING & MAPPING

Unmanned aerial vehicle device for automatic water sampling and sampling method

The invention relates to an unmanned aerial vehicle device and a sampling method for automatic sampling of water quality, comprising a main body of an unmanned aerial vehicle, an unmanned aerial vehicle foot arranged on the side of the main body of the unmanned aerial vehicle, and an energy source and a control unit. The man-machine device also includes a mounting bracket arranged on the underside of the main body of the drone, and an automatic water quality sampling unit is mounted on the mounting bracket. Driven by the stepping motor, the rotating guide shaft rotates to the position of the sampling bottle, and the water quality sample is sequentially introduced into the sampling bottle through the sampling pump, the sampling hose, and the groove guide mechanism. The UAV device of the present invention can sequentially collect water quality samples at multiple sampling points in one working cycle, which is convenient for synchronous analysis after returning, further improves sampling efficiency, and can flexibly set the number of samples collected according to requirements and can flexibly control each water quality sample. The depth of sample collection is convenient for fast and automatic collection of water quality samples in different regions or watersheds.
Owner:BEIJING ORIENT LANDSCAPE

GNSS Signal Processing with Regional Augmentation Network

Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospheric delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections. The correction data comprises at least one code bias per satellite, a fixed-nature MW bias per satellite and / or values from which a fixed-nature MW bias per satellite is derivable, and an ionospheric delay per satellite for each of multiple regional network stations and / or non-ionospheric corrections. Methods and apparatus for encoding and decoding the correction messages containing correction data are also presented, in which network messages include network elements related to substantially all stations of the network and cluster messages include cluster elements related to subsets of the network.
Owner:TRIMBLE NAVIGATION LTD

Rainfall distribution and dynamic measurement method based on big-data mobile communication network

The invention relates to a rainfall distribution and dynamic measurement method based on a big-data mobile communication network. The method comprises the following steps: (1) constructing a central server which is connected with a mobile terminal base station and establishing a data communication link among mobile terminals, base stations and the central server; (2) collecting transmitting power of the base stations and power, received by the base stations, of corresponding mobile terminals in real time; (3) establishing one-to-one correspondence relationships between the mobile terminals and some base stations and calculating the path attenuation of the communication link between each mobile terminal and the base station; (4) by taking the transmitting power of the base stations as a reference, calculating attenuation of signals of the mobile terminals caused by non-meteorological factors such as free space propagation loss, buildings, vegetation, unset obstacles and the like; obtaining rain-induced attenuation values of mobile terminal signals in unit distance; establishing correlative relationships between the signal attenuation characteristic of the mobile terminals and rainfall intensity distribution; carrying out fusion analysis with professional meteorological data such as a rain gauge, weather radar and the like to obtain areal distribution of rainfall and dynamic changes of rainfall.
Owner:PLA UNIV OF SCI & TECH

Microclimate disaster early warning method and system based on microclimate and satellite remote sensing data

The invention relates to a microclimate disaster early warning method and system based on microclimate and satellite remote sensing data, and belongs to the field of meteorological disaster early warning of an electrical power system. The microclimate disaster early warning method and system are characterized in that the satellite remote sensing technology is applied to power grid meteorological disaster monitoring, and combined application of macrometeorology and microclimate is achieved. Meteorological data in a ground observation database and satellite remote sensing observation data in a satellite remote sensing observation database are transmitted to an early warning platform server through a GSM network. Deep excavation on the observed data is carried out through analytical procedures, statistical information including the maximum value, the minimum value, the average valve and the like within any historical time period are settled, and specific information of the monitoring points is visually described for a user in the mode of graphs, curves and the like. The influence scope of the disaster weather are judged according to the disaster gradation standard,, power grid facilities influenced by the disaster weather are accurately positioned, and data supports and decision supports are provided for disaster prevention, disaster resistance and disaster reducing of power grids.
Owner:STATE GRID CORP OF CHINA +2

Ground station system and method for avoiding collinear interference with geostationary satellite

ActiveCN106027138ARealize coexistence at the same frequencyImprove usabilityRadio transmissionTelecommunications linkSynchronous orbit
The invention belongs to the field of satellite communication technologies and particularly relates to a ground station system and a method for avoiding collinear interference with a geostationary satellite. The system comprises a ground station located at one position of the earth and a non-geostationary satellite constellation connected to the ground station, wherein the ground station traces one satellite in the non-geostationary satellite constellation through controlling antenna beam and establishes a communication link with the satellite; when a connecting line between the ground station and one non-geostationary satellite points at the geostationary satellite, the ground station adjusts the beam direction and selects another non-geostationary satellite in the different direction in view to communicate, so that the collinear interference with the geostationary satellite is avoided. According to the ground station system and the method, the restriction that shutdown of the non-geostationary satellite is needed or the transmitting power of the non-geostationary satellite is greatly reduced when the collinear interference occurs is avoided, and the satellite communication of the ground station keeps continuous, so that the availability and the message capacity of the non-geostationary satellite constellation are improved and the same frequency coexistence of the non-geostationary satellite and the geostationary satellite is realized.
Owner:TSINGHUA UNIV

A method for reducing that scale of surface temperature space

The invention discloses a method for reducing that scale of surface temperature space. At first, that method quantitatively analyzes the surface temperature and the surface parameters including the impervious surface coverage, vegetation coverage, soil coverage, NDVI, NDBI, MNDWI, DEM, and the correlation between building density and its spatial distribution difference, Then the regression model of low spatial resolution land surface temperature products and related land surface parameters is established by using machine learning stochastic forest algorithm, land surface temperature with highspatial resolution can be predicted by combining the land surface parameters with high spatial resolution, Then the area-to-point Kriging interpolation method of geostatistics is used to reduce the residuals of the random forest regression model to improve the spatial resolution of the residuals, Finally, the high spatial resolution stochastic forest regression model and the surface-to-point Kriging interpolation residuals are added to generate high resolution and high precision surface temperature products to make up for the lack of spatial resolution of the existing surface temperature products.
Owner:GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI

Non-horizontalization free established station for total station and project measurement method of non-horizontalization free established station

The invention discloses a non-horizontalization free established station for a total station and a project measurement method of the non-horizontalization free established station. The invention belongs to the technical field of project measurement. The non-horizontalization free established station for the total station and the project measurement method are characterized in that (1) the total station is in a non-horizontal working gesture; the total station is operated to measure a slope distance, a horizontal angle and a zenith distance of at least thee geodetic datums; (2), according to the obtained measurement information of geodetic datums, a three-dimensional geodetic coordinate and gesture information of a total station point are obtained by using the method of non-horizontalization free established station for the total station; (3) the total station measures a point to be tested by the non-horizontal working gesture, and obtains the three-dimensional geodetic coordinate of the point to be tested through the measurement method of a non-horizontalization project of the total station. The invention solves technical problems of establishing a station, lofting and measuring only after flattening the total station in advance during project measurement, realizes the non-horizontalization free established station for the total station and project measurement of the non-horizontalization free established station; operation is simple; efficiency of field lofting and measuring works can be obviously improved.
Owner:JIANGXI EVERBRIGHT MEASUREMENT & CONTROL TECH CO LTD

Comprehensive application method for integrating forest fire danger forecasting and ground fire point monitoring

The invention discloses a comprehensive application method for integrating forest fire danger forecasting and ground fire point monitoring. The comprehensive application method for integrating the forest fire danger forecasting and the ground fire point monitoring comprises the steps that a forest fire danger class forecasting model is established; forest fire weather indexes are obtained by calculating; the forest fire weather index are divided to obtain forest fire danger classes; a satellite receiving system is adopted to receive polar orbit satellite data and pre-processes the polar orbit satellite data; on the basis of an MODIS fire disaster algorithm, a multiband brightness temperature value and a multiband reflectance value of the MODIS data are used for identifying an image; on the basis of a GIS technique, a forest fire danger class forecasting result and a ground fire point monitoring result are superimposed on an electrified wire netting output line and device and display a range of influence of a fire scene which can be intuitive analyzed. The comprehensive application method for integrating forest fire danger forecasting and ground fire point monitoring combines the forest fire danger class forecasting result and the ground fire point monitoring result with the electrified wire netting output line and device, the disposition efficiency of a forest fire accident is improved, and the monitoring range is wide.
Owner:CHINA SOUTHERN POWER GRID COMPANY +2
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