Ice radar data processing method suitable for Antarctic aerial observation site

A technology for radar data and data processing, which is used in measurement devices, re-radiation, radio wave measurement systems, etc., to achieve high signal-to-noise ratio and high resolution.

Inactive Publication Date: 2019-10-22
BEIJING UNIV OF TECH +1
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Problems solved by technology

[0004] In view of this, in order to solve the problem of rapid acquisition of high-resolution and high signal-to-noise ratio ice radar profiles at the Antarctic aerial observation site

Method used

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  • Ice radar data processing method suitable for Antarctic aerial observation site
  • Ice radar data processing method suitable for Antarctic aerial observation site
  • Ice radar data processing method suitable for Antarctic aerial observation site

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings.

[0036] figure 1It is an overall flowchart of an algorithm for processing ice radar data applicable to the Antarctic aerial observation site proposed by the present invention, such as figure 1 shown, including:

[0037] A down-conversion module, a DC component removal module, a pulse compression module, a coherent superposition module and a non-coherent superposition module.

[0038] Down-conversion module: The IF sampling technology adopts low-pass filtering method, which directly mixes the original ice radar data with the 70MHz local oscillator signal and then removes the carrier frequency, and then filters out the mixed frequency through a low-pass filter (LPF). Upper sideband signals and higher harmonic signals. The low-pass filter adopts 128-order, and the cut-off frequency is The FIR filter is used to complete the quadrature de...

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Abstract

The invention relates to an ice radar data processing method suitable for an Antarctic aerial observation site and belongs to the field of computer parallel computing and radar signal processing. Themethod comprises down-conversion, DC component removal, pulse compression, coherent superposition and non-coherent superposition to obtain an ice radar profile map. Static memory pre-allocation, parallel computing and data block processing are used in the data processing procedure to satisfy the requirement for high resolution, high signal-to-noise ratio and short processing time of the generatedice radar profile map at the Antarctic aerial observation site.

Description

technical field [0001] The invention relates to the fields of radar signal processing and computer parallel computing, in particular to a method for processing ice radar data suitable for Antarctic aerial observation sites and its optimization acceleration. Background technique [0002] In the context of global warming, monitoring and assessing changes in polar ice sheets and their impact on global climate and sea level is critical. Because the aviation platform has the advantages of high data acquisition efficiency, wide reachable area and large coverage, the international airborne geophysical survey with multiple scientific research equipment synchronous observation has become the mainstream method, among which airborne ice radar started in the 1960s Widely used in polar ice sheet surveys. The electromagnetic waves in the very high frequency band emitted by the ice radar have strong penetrability to the ice body, which can not only be used to identify the bedrock interfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/285G01S13/88
CPCG01S7/285G01S13/88
Inventor 稂时楠崔祥斌赵钰恺郭井学唐学远孙波
Owner BEIJING UNIV OF TECH
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