Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining equivalence of elevation estimation precisions of satellite-borne multi-frequency and multi-baseline InSARs (interferometric synthetic aperture radars)

A determination method, multi-frequency technology, applied in the field of signal processing, can solve the problem of limited DEM acquisition accuracy and so on

Inactive Publication Date: 2012-06-20
BEIHANG UNIV
View PDF1 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the acquisition accuracy of DEM is essentially limited by the InSAR elevation accuracy

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
  • Method for determining equivalence of elevation estimation precisions of satellite-borne multi-frequency and multi-baseline InSARs (interferometric synthetic aperture radars)
  • Method for determining equivalence of elevation estimation precisions of satellite-borne multi-frequency and multi-baseline InSARs (interferometric synthetic aperture radars)
  • Method for determining equivalence of elevation estimation precisions of satellite-borne multi-frequency and multi-baseline InSARs (interferometric synthetic aperture radars)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] according to figure 1 and figure 2 InSAR elevation estimation model in and image 3 The equivalence determination method of the space-borne multi-frequency and multi-baseline InSAR elevation estimation accuracy described in the present invention uses specific InSAR altimetry system parameters to conduct experiments to verify the equivalence of multi-frequency InSAR and multi-baseline InSAR elevation estimation accuracy, and at the same time Verify the validity of the equivalent conditions. Table 1 below gives the simulated InSAR system parameters.

[0093] Table 1 Simulation system parameters

[0094]

[0095]

[0096] according to image 3 As shown, the steps of the present invention when determining the equivalence of multi-frequency InSAR and multi-baseline InSAR elevation estimation accuracy are as follows:

[0097] Step (1): The baseline length of the InSAR system is limited to vary between 200-650 meters, and the correlation coefficient of the InSAR sy...

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

A method for determining equivalence of elevation estimation precisions of satellite-borne multi-frequency and multi-baseline InSARs (interferometric synthetic aperture radars) comprises the following four steps: 1, giving an interferometric phase probability density function; 2, acquiring a maximum likelihood function of the multi-frequency and multi-baseline InSAR elevation estimation; 3, computing a CRLB (Cramer Rao lower bound) of the multi-frequency and multi-baseline InSAR elevation estimation; and 4, analyzing the equivalence of the elevation estimation precisions of the multi-frequency InSAR and the multi-baseline InSAR. Based on the interferometric phase probability density function, the CRLB of the multi-frequency and multi-baseline InSAR elevation estimation is computed to obtain the equivalence of the multi-frequency InSAR and the multi-baseline InSAR in an aspect of improving the elevation estimation precisions and provide an equivalent condition; the method provides a theoretic basis for design of a multi-frequency InSAR system or a multi-baseline InSAR system and the general analysis and provides a theoretic support for acquiring global and high-precision DEM (digital elevation model); and the method has a relatively high practical value and wide application prospect in the signal processing field.

Description

(1) Technical field [0001] The present invention relates to a space-borne Interferometric Synthetic Aperture Radar (Interferometric Synthetic Aperture Radar, referred to as InSAR) elevation estimation precision analysis and determination method, in particular to a spaceborne multi-frequency and multi-baseline InSAR elevation estimation equivalence determination method, which belongs to the signal Dealing with technical fields. (2) Background technology [0002] Digital Elevation Model (Digital Elevation Model, referred to as DEM) was proposed in the late 1950s. It is a digital expression of terrain surface morphological information, and it is an all-digital expression with spatial position characteristics and terrain attribute characteristics. DEM is one of the most important spatial information data in the geographic information system (Geographic Information System, referred to as GIS) spatial database, and is the core data of 3D spatial data processing and terrain analysi...

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
IPC IPC(8): G01S13/90
Inventor 徐华平李爽尤亚楠
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com