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

Method for calibrating long-wavelength satellite-borne CTLR-mode compact-polarized SAR

A technology of reduced polarization and long wavelength, applied in the field of signal processing, can solve the problem that SAR images cannot correctly reflect the polarization scattering characteristics of ground targets, and achieve the effect of high precision and simple processing flow

Inactive Publication Date: 2011-09-14
BEIHANG UNIV
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Faraday rotation effect causes the polarization plane of the SAR signal to rotate, causing the SAR image to not correctly reflect the polarization scattering characteristics of the ground target

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 calibrating long-wavelength satellite-borne CTLR-mode compact-polarized SAR
  • Method for calibrating long-wavelength satellite-borne CTLR-mode compact-polarized SAR
  • Method for calibrating long-wavelength satellite-borne CTLR-mode compact-polarized SAR

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] The method proposed in the present invention is verified by simulation experiments.

[0061] In the simulation experiment, according to the given parameters, including the Faraday rotation angle Ω, the unbalance error f of the receiving channel, and the crosstalk coefficient δ of the linearly polarized receiving channel 1 and δ 2 , the circularly polarized transmit channel crosstalk coefficient δ c , and the scattering matrix of the scaler:

[0062] S Gt 1 = 1 0 0 0 S Gt 2 = 0 0 0 1 ...

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

The invention discloses a method for calibrating long-wavelength satellite-borne CTLR-mode compact-polarized SAR. The method comprises the following steps of: 1, acquiring an estimated value of an unbalanced error of a receiving channel; 2, acquiring an estimated value of a crosstalk coefficient of a circular-polarized transmitting channel; 3, acquiring an estimated value of a crosstalk coefficient of a linear-polarized receiving channel; 4, acquiring an estimated value of a Faraday rotation angle; and 5, acquiring an unambiguous estimated value of the Faraday rotation angle by using total electron content (TEC) data of a global navigation satellite system (GNSS) to finish SAR calibration. By the method, the processing process is simple and the processing precision is high; and the application of the method in processing of the long-wavelength satellite-borne CTLR-mode compact-polarized SAR data represented by a P wave band is very important.

Description

technical field [0001] The invention relates to a calibration method for a long-wavelength space-borne circular polarization transmitting and linear polarization receiving (CTLR) reduced polarization mode synthetic aperture radar (SAR), which belongs to the technical field of signal processing. Background technique [0002] Forest biomass is one of the key links in the inversion of the global carbon cycle model, and it is of great significance to the study of major basic scientific issues such as the interaction between the global carbon cycle and climate change. Long-wavelength spaceborne SAR images have great potential in retrieving land surface biomass (Biomass), and have attracted great attention from major scientific and technological powers in the world in recent years. Forest biomass observation SAR has become one of the hot topics in the current international research frontier. The European Space Agency (ESA) has selected six new Earth probe missions represented by ...

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): G01S7/40G01S13/90
Inventor 陈杰李卓尹巽军李春升
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