Migratory Insect Multifrequency Radar Cross Sections for Morphological Parameter Estimation
| Autor: | Cheng Hu, Teng Long, Rui Wang, Jason Lim, Philip J. L. Gould, Kongming Wu, Shaoyang Kong, Tianjiao Lang, Changjiang Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Multifrequency
Estimation theory Computer science media_common.quotation_subject fungi 0211 other engineering and technologies Migratory insect 02 engineering and technology Insect Signal law.invention Identification (information) law Range (statistics) General Earth and Planetary Sciences Species identification Insect migration Feature extraction Radar cross section (RCS) Electrical and Electronic Engineering Radar 021101 geological & geomatics engineering media_common Remote sensing |
| Popis: | Insect migration provides major ecosystem services, and sometimes, migratory pests cause serious crop damage and yield loss. Species identification is critically important in studies of insect migration, for both entomologists and pest managers. Radar is an effective means of detecting insect migrants. Current entomological radars usually operate at X-band, and signal amplitude information is used to estimate body mass and wing-beat frequency, which can then be used to categorize migratory insects into broad taxon classes. To improve the identification performance, this paper presents a novel radar method of measuring insect mass and body length. The multifrequency radar cross sections (RCS) of insects at X-band and Ku-/K-band are fully investigated, and the comprehensive relationship between RCS and insect morphological parameters provides an improvement in the estimation of insect mass. More importantly, estimations of body length can also be realized with an accuracy of 84% based on experimental data acquired by a vector network analyzer in a microwave anechoic chamber. If multifrequency RCS measurements can be obtained by radar in the future, then highly accurate estimations of insect mass and body length will be possible, although it is currently still a challenge to build a radar capable of making the required measurements over such a wide frequency range. |
| Databáze: | OpenAIRE |
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