Radar altimeter and measurement method for position of aircraft by the radar altimeter

A technology of altimeter and testing method, applied in the field of positioning and navigation, can solve the problems of radar altimeter echo signal leading edge slowing down, reducing radar altimeter measurement precision, affecting echo signal capture, etc., to achieve navigation information and completeness , measurement accuracy improvement, the effect of improving measurement accuracy

Inactive Publication Date: 2007-08-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF0 Cites 50 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of terrain and topography, radar altimeter echo signals are prone to frontal slowing, waveform broadening and splitting, etc.
The existence of these phenomena affects the capture of the echo signal and reduces the measurement accuracy of the radar altimeter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radar altimeter and measurement method for position of aircraft by the radar altimeter
  • Radar altimeter and measurement method for position of aircraft by the radar altimeter
  • Radar altimeter and measurement method for position of aircraft by the radar altimeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0022] Suppose the flight height H of the carrier aircraft a = 5000m, when the working frequency is Ku band, choose the baseline length 0.5836m, according to the relationship between ranging accuracy and frequency and baseline, the distance-phase accuracy ratio at this time can be obtained

[0023] According to the signal processing flow in Figure 3, first apply the Doppler filter to antenna 1 to select and receive the echo of Doppler strip B and save it, and at the same time use the coarse-precision high-speed tracking loop of channel 1 to obtain the antenna 1 A rough estimate of the distance value from the region's highest point. In the next time interval, the area where the Doppler strip a is located directly below the carrier aircraft is transformed into Doppler strip b at the same time. At this time, the narrow-band high-precision tr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

This invention relates to one radar height meter and its fly device position measurement method in positioning guide field, wherein, the meter comprises one emission antenna and two receive antenna on both sides of load machine to form base line vertical to fly route; the invention method comprises the following steps: adopting one emission antenna and two receive antenna; computing fly distance to aim through two antenna signal phase difference; using Doppler displacement information to compute aim position to improve distance and height measurement accuracy.

Description

technical field [0001] The invention belongs to the field of positioning and navigation, and in particular relates to high-precision radar height measurement and terrain-assisted navigation technology. Background technique [0002] The radar altimeter is an altimeter radar mounted on aircraft, satellites and other flying platforms, which can be used to measure the average height from the radar to the target surface, target fluctuation characteristics and target backscatter characteristics and other parameters. As a microwave remote sensor, the radar altimeter is less affected by climate, weather, and day and night, and has the characteristics of all-weather and all-day time. It can be used in orbit measurement, ballistic correction, cruise guidance, aerospace landing, geodesy, oceanographic mapping, etc. [0003] So far, the development of radar altimeter has gone through four stages. Among them, the AHV altimeter developed by the French T.T.R company (applied to aircraft ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/06G01S13/08
Inventor 皮亦鸣付毓生曹宗杰闵锐范录宏王海江王金峰周鹏杨永红
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap