35 results about "Cloud base height" patented technology

The invention discloses a system and a method for measuring a cloud base height through combination of radiation brightness temperature and photogrammetry. The method comprises the following steps: calibrating interior orientation elements and radiation brightness temperatures of two thermal infrared image sensors, shooting cloud images by using the two thermal infrared image sensors respectively, and acquiring original brightness temperature data; enhancing and filtering the two infrared cloud images respectively, and extracting and matching features of the images; according to an image matching result, acquiring a homonymy point; when the infrared cloud images have clear textures, according to a double imaging photogrammetric principle, calculating to acquire the cloud base height; according to the original brightness temperature data of the images, acquiring a brightness temperature value corresponding to the homonymy point, and establishing a relationship between the cloud base height and the brightness temperature; when the infrared cloud images have fuzzy textures or no textures, based on the relationship between the cloud base height and the brightness temperature at a previous time, calculating the cloud base height. Through the system and the method, the cloud height measuring precision is ensured on the premise of reducing the fog influence and improving the data acquisition rate.

The invention discloses a cloud-base height inversion method based on radio occultation detection data, comprising the following steps of: firstly, giving statistics of distribution characteristics within the worldwide COSMIC occultation vertical sounding scope and calculating the probability of the cloud-base height inversion influenced by the COSMIC sounding scope; secondly, reading temperaturedata and water vapour pressure data from COSMIC occultation detection moist air data; thirdly, acquiring cloud-base height information with the combination of relative humidity variation profile inversion based on the method brought forward by Wang for determining the cloud-base height by using relative humidity profile data; finally, based on the method brought forward by Wang for determining the cloud-base height by using the relative humidity profile data, carrying out the cloud-base height inversion by the adoption of radiosonde detection data, and calculating the relative difference between the radiosonde cloud-base height inversion result and the COSMIC cloud-base inversion result. The cloud-base height inversion method provided by the invention makes up the defects that previous satellite remote sensing can not provide bottom cloud-base height information and the reliability of field observation is poor for the detection of the medium cloud-base height and the high cloud-base height.

The present invention disclosed a height monitoring method based on the cloud bottom of Fengyun No. 4 and the foundation millimeter wave radar.This method is: the monitoring results of the base of the base millimeter wave radar divide the clouds into different types. Based on this, organize Fengyun No. 4 meteorological satellite remote sensing product and foundation millimeter wave radar data to form a historical database;The accumulated neural network analyzes historical data, and uses the monitoring results of the ground base millimeter wave radar to correct the monitoring results of Fengyun No. 4 meteorological satellite, and establish a highly -based cloud -based high -level monitoring model; use historical data to verify the monitoring model, determine the results according to the resultsWhether to adjust the model; use the real -time Fengyun 4 meteorological satellite remote sensing product and the final determined cloud underground monitoring model to monitor the height of the cloud underground.The invention has high accuracy, small errors, and wide monitoring scope of the height of the cloud underground, which can be used to develop height products of satellite cloud underground.

The invention discloses a vehicle-mounted ceilometer chamber which comprises a ceilometer chamber body, a chamber door, a chamber door inclined strut, a slide rail, a retractable platform, a circular turntable, turntable bolts, a locking bolt and the like. The complete equipment is used for fixing and supporting a ceilometer during transportation and detection work and is placed in a ceilometer chamber formed in a detection vehicle. The chamber door is opened and placed in a horizontal direction through the chamber door inclined strut, the turntable bolts are loosened, the locking bolt is taken out, the ceilometer, together with the retractable platform and the circular turntable, is pulled onto the chamber door through the slide rail, the locking bolt is screwed, the turntable bolts are rotated into circular holes in the retractable platform, and the ceilometer enters into a working state. According to the invention, the ceilometer is fixed in a special chamber, damage caused by external force during transportation is avoided, and the ceilometer can be directly taken out and placed on a vehicle to carry out cloud base height detection without being carried to the ground and can be rotate in different directions to perform cloud base height detection in different directions. The vehicle-mounted ceilometer chamber has the advantages of compact and reasonable integral design, simple structure, low cost, convenience in use and firmness in fixation.

The present invention provides a cloud scattering error correction method and device for a laser altimeter, wherein the method includes: acquiring echo waveform data of the altimetry laser, the echo waveform data including echo power at different altitudes; calculating Raw altimetry data; calculate backscatter coefficient and extinction coefficient at different altitudes according to echo power; calculate cloud top height and cloud base height according to backscatter coefficient; calculate attenuation coefficient according to backscatter coefficient and extinction coefficient; calculate cloud top height according to cloud top height , cloud base height, and attenuation coefficient to calculate the cloud optical thickness; calculate the altimetry deviation correction value based on the cloud optical thickness and the altimetry deviation model caused by atmospheric scattering; calculate the corrected altimetry data based on the original altimetry data and the altimetry deviation correction value. This method not only can quickly calculate the height measurement deviation correction value, but also the calculated height measurement deviation correction value is relatively accurate.

The invention provides a method and device for predicting the arrival and departure rate of flights. The method includes classifying the meteorological conditions of the airport according to the cloud base height and visibility, and establishing the first arrival rate function model and the first Departure rate function model; according to the historical data set of the airport, and using the opportunity constraint optimization model to optimize the first arrival rate function model and the first departure rate function model, the second arrival rate function model and the first departure rate function model of the flight are established. Two departure rate function models; obtain the current meteorological conditions of the airport, select the corresponding second arrival rate function model and the second departure rate function model under the current weather conditions; obtain the predicted arrival rate and predicted departure rate of airport flights . The invention establishes a flight arrival and departure rate function model on the basis of the airport historical data set, and can accurately predict the flight arrival and departure rate.

The invention discloses a multilayer cloud real-time distance measurement device and a distance measurement method thereof. The multilayer cloud real-time distance measurement device comprises a laser beam expanding and shaping system, an infrared laser diode, a signal identification timer, a system control module, a photoelectric detector, a subsequent light path, a small hole diaphragm and a receiving telescope; the laser beam expanding and shaping system is arranged in front of the infrared laser diode, and the infrared laser diode is connected to the signal identification timer; the signal identification timer is connected with the photoelectric detector, the photoelectric detector is connected with the subsequent light path, and the small hole diaphragm and the receiving telescope are arranged in front of the subsequent light path in sequence; the laser beam expanding and shaping system is formed by combination of a plurality of adjustable lenses; and the system control module includes a communication interface used for being connected with an upper computer. According to the multilayer cloud real-time distance measurement device provided by the invention, an efficient optical transmitting and receiving system and a simple low-cost distance measurement identification circuit are adopted, the multilayer cloud-base height can be measured, and the multilayer cloud real-time distance measurement device can automatically work all the time in an unattended manner.

The invention relates to a cloud layer height measurement system based on an aircraft. The cloud layer height measurement system comprises an air measuring device and a ground control device. The air measuring device comprises the aircraft, a first control module, a location module, an airborne communication module and an image shooting device, wherein the first control module, the location module, the airborne communication module and the image shooting device are arranged on the aircraft, the image shooting device is perpendicularly arranged on the surface of the aircraft upwards in the shooting direction, the ground control module comprises a second control module, a ground communication module and an information output device, and the ground communication module and the information output device are connected with the second control module. The invention meanwhile relates to a cloud layer height measurement method. By means of the cloud layer height measurement system and the cloud layer height measurement device based on the aircraft, the cloud top height or the cloud base height can be flexibly and accurately measured according to measurement requirements, and the measurement work efficiency is effectively improved.

The invention discloses a method for quickly determining the cloud reflectance applicable to the oxygen A zone, the method comprising the following steps: 1) obtaining the solar zenith angle θ during satellite observation; 2) setting the cloud attributes required for calculating the cloud reflectance, Including cloud optical thickness, cloud top height and cloud base height; 3) divide the spectral range of the oxygen A band to be calculated into multiple wavelength sequences; 4) calculate the cloud reflectance wavelength by wavelength for the divided wavelength sequences; 5) divide The calculated reflectances of clouds are arranged in ascending order of their corresponding wavelengths. The invention proposes a simplified calculation model of the cloud reflectance, and calculates the reflection of the cloud layer on each spectrum. The time-consuming calculation of cloud reflectance is shortened, the calculation pressure is reduced, the speed of single data processing is accelerated, and the cost of single satellite data is reduced.