35 results about "Atmospheric measurements" patented technology

An apparatus providing for simultaneous measurement of the wind upstream and downstream of a wind turbine uses either a single LIDAR beam split into two beams, each focused upstream or downstream of the windmill, or a multiple beam LIDAR with a first beam source aimed toward the upstream direction of the wind and a second beam source aimed at the downstream direction after the wind has passed through the wind turbine. The apparatus may also use LIDAR to measure wind direction and speed by making measurements along slightly different lines of sight, or by pointing the LIDAR in different directions. Two lines of sight allow measuring wind direction in the plane defined by the two lines of sight. Three non-coplanar lines of sight provide the information necessary to determine a full 3-dimensional wind velocity vector. Further, LIDAR may also be used to measure wind speed by estimating the wind velocity using inputs from both aerosol and molecular components.

A method and structure that inputs atmospheric forecast information from the atmospheric forecast database based on current, real time atmospheric measurements. The hyperspectral detection processing unit also inputs at least one selected reflectance library from the reflectance library database, and data collection and sensor parameters from the sensor. With this information, the hyperspectral detection processing unit employs a model to produce at least one mission radiance library during the mission planning phase. Then, during the actual mission execution, the sensor is used to collect the hyperspectral data and the comparator can immediately compare the hyperspectral data to the mission radiance library to identify features and/or targets.

A method and system configured to provide a weather forecast for a selected zone is provided. The method and system is configured to receive meteorological reports and locally sensed measurements. The information is transmitted to a weather model preprocessor disposed on the device which generates an analysis field. This information is passed to the weather model which is an executable program also disposed on the device. The weather model processes the analysis field generated by meteorological reports, large-scale initialization data and in-situ sensor values to generate an initial weather forecast. The weather model updates the initial weather forecast with real-time, high-resolution atmospheric measurements to generate a weather forecast more representative of the user's zone than that available from Internet/media outlets. Furthermore, because the weather model is run on the mobile device itself, staleness of the forecast will no longer be an issue, as forecasts can be generated on demand.

The invention provides a direct solar radiation measuring system capable of being applied to a mobile atmosphere observation platform. The direct solar radiation measuring system comprises a mountingbase and a triaxial self-stabilizing platform, wherein the triaxial self-stabilizing platform comprises a gyroscope sensor, a heading direction rotating shaft, a rolling rotating shaft and a pitchingrotating shaft; the pitching rotating shaft is fixedly connected with a mono-/multi-/high-spectral irradiance radiometer, a camera and an attitude sensor, the mono-/multi-/high-spectral irradiance radiometer and the camera are adjacently arranged in parallel and are fixedly connected to form an observation group with the same field of vision; a GPS (Global Positioning System) antenna and an electronic compass are further arranged on the triaxial self-stabilizing platform; a circuit board and a power supply are arranged in the mounting base, and the circuit board is used for controlling movement of the three rotating shafts and receiving, storing and processing data; the power supply is used for supplying power to all sensors, the GPS antenna, the electronic compass and the circuit board onthe triaxial self-stabilizing platform. The measuring system provided by the invention can effectively achieve vehicle-mounted, shipborne and airborne dynamic real-time underway automatic measurementand provides a new automated measuring method for atmospheric measurement.

The invention belongs to the technical field of satellite remote sensing, and particularly relates to a satellite remote sensing image atmospheric correction spectral analysis method. Atmospheric correction is performed according to spectral information of the image completely with no requirement for equivalent precision of the image topographic relief area and the flat area after DTM correction or synchronous atmospheric measurement data or ground object reflectivity measurement data, and the correction precision is obviously better than that of the image corrected by the present popular atmospheric correction software. The output atmospheric image and the ground object image are reflectivity images and can be synthesized into true color images and used for quantitative analysis. Landform information and BRDF information of the original image are completely reserved. Partitioned correction is performed on a huge image and the images are spliced into a complete image without lapping defect, and general atmospheric correction software can be developed. The satellite remote sensing image atmospheric correction spectral analysis method is the scientific achievement of the China's national natural science fund ("remote sensing image atmospheric correction spectral vector analysis model", the grant number: 41371394) project.

The invention relates to a method and a radiosonde. According to the method at least temperature and relative humidity of the atmosphere are measured by a radiosonde. In accordance with the invention the humidity measurement is performed continuously in an elevated temperature in order to make the measurement faster and both the elevated temperature and ambient air temperature are measured simultaneously and based on these values relative humidity is determined and the humidity sensing elements are positioned on a planar substrate.

A method of obtaining data for use by a receiver of a satellite positioning system or a GNSS comprises deriving the data remotely from the receiver by a server (200), using meteorological information and a regional or global three dimensional map of grid points from which it computes tropospherical delays by ray tracing through the refractivity field derived from atmospheric measurements of pressure, temperature and water data content, such measurements being available from meteorological bodies. When used to enhance position determined by a user receiver that includes a non-meteorological, climate based model (130) giving zenith delays and means (130′) to map them to particular inclinations, the server also includes a copy of such non-meteorological model (230) and provides its ray traced delay values as zenith delays. The sets of zenith delay values for corresponding grid points are compared in the server (260) and modifications developed (preferably in fractional form) by which the non-meteorological delay values require correcting to be accurate. The correction sets are reduced by image compression techniques (270) and transmitted via the satellites (110₁ etc) of the GNSS at low data rate to the user receiver, which receiver simply applies the corrections to the Zenith delays derived by its own model. If a user position is known, the server may derive accurate tropospheric delay values directly for the receiver position directly for transmission.

An improved system and method for evaluating stored agricultural or horticultural commodities is provided. The system and method generally include performing atmospheric measurements within multiple controlled atmosphere rooms, or sampling enclosures coupled to controlled atmosphere rooms, and determining a change over time of a respiratory value of the commodities stored therein. Based on the change over time of the respiratory value, the system and method selects commodities from among at least one of the controlled atmosphere rooms for delivery, marketing, storage, or other disposition.

The invention discloses a method for verifying an optical load on-orbit absolute radiometric calibration result. The method comprises the following steps: selecting an underlying surface and a calibration field based on calibration field target characteristics and atmospheric measurement data; synchronously measuring target reflection characteristic parameters and atmospheric parameters of the calibration field on the ground, and processing the synchronously measured data on the ground; the method comprises the following steps: acquiring image data based on a satellite-borne optical sensor, processing the image data, and extracting a corresponding channel calibration coefficient of the sensor; calculating a radiance simulation value at the entrance pupil of the satellite-borne optical sensor of the calibration field by using an atmospheric radiation transmission model; calculating the relative difference between the equivalent radiance simulation value and the equivalent radiance observation value at the entrance pupil of the satellite-borne optical sensor of the calibration field; based on the error transfer theory, carrying out single-field verification uncertainty evaluation, and obtaining single-field verification uncertainty; and based on an international measurement basis comparison result analysis method, determining a weight coefficient of each field by taking single-field verification uncertainty as a component, and synthesizing a multi-test-field comprehensive foundation verification result and total uncertainty.

The invention provides a dynamic parachute-opening control system, and belongs to the technical field of spacecraft test control. Axial dynamic pressure and static pressure of a model are measured through an airspeed head arranged at a head of the model, the model axial dynamic pressure is output after processing through an atmosphere measurement computer, then the model axial dynamic pressure issent to a dynamic pressure data processor, and the dynamic pressure data processor is used for comparing the measured dynamic pressure value with a dynamic threshold, and real-time measured overload data can be combined. When judging that a comprehensive condition reaches a parachute-popup condition, a test parachute-popup instruction is sent to a general controller so as to pop up a test parachute, wherein the comprehensive condition, especially the dynamic threshold, is a simulation result obtained according to model flight trajectory simulation analysis. The control system provided by the invention can be applied to the precise control of various airdrop tests to verify the parachute opening performance of the parachute under the specific dynamic pressure condition, the reliable work ofthe test parachute can be effectively guaranteed, and the safe recycling of the test model is guaranteed.

The invention discloses an atmosphere measuring instrument for air quality detection, which structurally comprises a detection blade box, a wind direction detector, a wind power detector, a display panel and a control box, the detection blade box is vertically fixed between the wind direction detector and the wind power detector through bolts, the wind power detector is arranged at the upper end of an outer shell of the display panel, the display panel is arranged at the top of the control box, and the control box is connected with the detection page box through a wire. Theatmosphere measuringinstrument has the beneficial effects that through cooperation of a locking buckle, an upper coupling sleeve shaft and a limiting sleeve shaft, a cleaning bottom frame is driven to rotate to synchronously clean the waterproof upper shell, dust deposition is avoided, meanwhile, due to the limiting effect of the locking buckle, the driving shaft can be linked in the center of the bearing, poor transmission caused by contact between a transmission part and dust is avoided, and meanwhile, the situation that the cleaning effect is poor due to synchronous rotation of the upper and lower fixed shafts is avoided.

The embodiment of the invention provides a temperature and emissivity separation method and device based on double networks. The method comprises the following steps: inputting a thermal infrared radiation spectrum and atmospheric measurement parameters of a target ground object into a first network model, and outputting atmospheric downlink radiation; inputting the spectrums of the atmospheric downlink radiation and the thermal infrared radiation into a second network model, and outputting the temperature and the emissivity of the target ground object, wherein the first network model is obtained by training according to an atmosphere lookup table,and the second network model is obtained by training according to the sample remote sensing data and the corresponding temperature and emissivity. According to the temperature and emissivity separation method and device provided by the embodiment of the invention, atmospheric downlink radiation is estimated through the first network model, temperature and emissivity separation is carried out through the second network model, and the temperature and emissivity separation precision can be improved.

The embodiment of the invention provides an atmospheric data measuring device, and the device comprises a pipe body for receiving atmosphere; a sensor which is used for measuring the atmosphere to obtain first atmosphere data; a control module which is electrically connected with the sensor, comprises a digital signal port, and is used for obtaining second atmospheric data according to the first atmospheric data and transmitting the second atmospheric data through the digital signal port; a body which is fixedly connected with the pipe body and used for fixing the control module; and an aviation plug which is used for fixing the atmospheric data measuring device on external equipment. According to the atmospheric measurement device provided by the embodiment of the invention, an air entraining function and an atmospheric data measurement function are integrated together to form an integrated product. Remote digital signal transmission is used for replacing existing air guide pipe drainage, measurement errors caused by airflow remote transmission are avoided, the measurement precision can be greatly improved, and the weight of the whole system can be greatly reduced by replacing anair guide pipe with a cable.