Assessment of the impact of long integration time in Geosynchronous SAR imagery of agricultural fields by means of GB-SAR data

Geosynchronous synthetic aperture radar (GeoSAR) missions offer the advantage of near-continuous monitoring of specific regions on Earth, making them essential for applications that require continuous information. However, wind-induced motion along the inherent long integration time can result in im...

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Detalles Bibliográficos
Autores: Aguasca Solé, Alberto|||0000-0003-2079-4322, Broquetas Ibars, Antoni|||0000-0001-9801-9145, López Sánchez, Juan Manuel, Fabregas Canovas, Francisco Javier|||0000-0002-7654-9695, Mallorquí Franquet, Jordi Joan|||0000-0002-9424-1889, Mas i Méndez, Mireia|||0000-0001-6679-3961
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/398451
Acceso en línea:https://hdl.handle.net/2117/398451
https://dx.doi.org/10.1109/JSTARS.2023.3338468
Access Level:acceso abierto
Palabra clave:Synthetic aperture radar
Radar in agriculture
Backscattering
Coherence amplitude
Geosynchronous synthetic aperture radar (GeoSAR)
Integration time
Scene decorrelation
Radar d'obertura sintètica
Radar en agricultura
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar
Descripción
Sumario:Geosynchronous synthetic aperture radar (GeoSAR) missions offer the advantage of near-continuous monitoring of specific regions on Earth, making them essential for applications that require continuous information. However, wind-induced motion along the inherent long integration time can result in image defocusing, with potential degradation of retrieved information. This article aims to investigate the impact of GeoSAR long integration time in synthetic aperture radar (SAR) imaging and derived products (time series of backscatter and coherence) required to extract agriculture-relevant soil or crop parameters of interest. The study is based on the extensive HydroSoil data acquisition campaign carried out over barley and corn crops, funded by the European Space Agency. The collected raw data are used to synthesize equivalent apertures with integration times of up to 4 h, similar to those acquired with a GeoSAR. These ultraslow apertures facilitate the assessment of the impact of agricultural scene decorrelation on the generation of images with extended integration times.

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