NDLI: Comparison of radar signatures based on flight morphology for large birds and small birds

Content Provider	IET Digital Library
Author	Gong, Jiangkun Yan, Jun Li, Deren Chen, Ruizhi
Abstract	The identification of bird size from radar echoes is a mission in radar ornithology. Yet, neither radar cross-section nor wingbeat frequency measured from radar signals of birds is good recognition discriminant. In this study, the authors propose that large birds habitually carry their feet stretched out behind them during flight, leaving their feet apart from the body and being recognisable to both human observation and radar detection, while small birds tend to carry their feet drawn up in front, clinging to the body, thus hiding their feet from detection. The 23 most common bird species groups involved in bird strike hazards are consistent with this classification criterion. The visibility of a bird's feet will register radar signatures on bird echoes, and these signatures contribute to the classification of radar echoes from different sized birds in relatively short data sampling time. Their Ku-band avian radar data indicated that those radar signatures, including distribution of scattering centres and the modulation in radar echoes from small birds and large birds, do differ in radar echoes from large birds and small birds.
Starting Page	1365
Ending Page	1369
Page Count	5
ISSN	17518784
Volume Number	14
e-ISSN	17518792
Issue Number	Issue 9, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2020.0064
Journal	IET Radar, Sonar & Navigation
Publisher Date	2020-05-07
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	23 Most Common Bird Species Groups Bird Echoes Bird Size Bird Strike Hazards Different Sized Birds Doppler Radar Electrical Engineering Computing Feet Human Observation Ku-band Avian Radar Data Optical, Image And Video Signal Processing Radar Computing Radar Cross Section Radar Detection Radar Echoes Radar Equipment Radar Imaging Radar Ornithology Radar Signal Radar Signatures Statistics System And Application Zoology
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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