Vegetation Water Content Estimation Using GNSS Measurements

Global Navigation Satellite Systems (GNSS) opportunity signals reflected at or near the Earth's surface have already shown their potential to perform retrievals of a number of geophysical parameters. Radio occultations using GNSS signals are also used for atmospheric sensing. This letter presen...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2012-03, Vol.9 (2), p.282-286
Main Authors: Rodriguez-Alvarez, N., Bosch-Lluis, X., Camps, A., Ramos-Perez, I., Valencia, E., Hyuk Park, Vall-llossera, M.
Format: Article
Language:English
Subjects:
Atmospherics
Attenuation
Enginyeria de la telecomunicació
Geographic information systems
Global navigation satellite system
Global Navigation Satellite Systems
Global Navigation Satellite Systems (GNSS)
Global Positioning System
GNSS
Instruments
Localització per satèl·lit, Sistemes de
Mobile geographic information systems
Moisture content
Radiocomunicació i exploració electromagnètica
Radionavegació
Remote sensing
Satellite navigation systems
Satèl·lits i ràdioenllaços
Sistema de posicionament global
Vegetation
Vegetation mapping
water content
Àrees temàtiques de la UPC
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Summary:Global Navigation Satellite Systems (GNSS) opportunity signals reflected at or near the Earth's surface have already shown their potential to perform retrievals of a number of geophysical parameters. Radio occultations using GNSS signals are also used for atmospheric sensing. This letter presents a GNSS technique to retrieve vegetation water content (VWC). This technique measures the received powers of the GPS signals in open sky and under the vegetation layer. From these two powers, the attenuation due to the vegetation is computed, which is related to the VWC. This letter presents the results obtained after deploying the instrument in a walnut-tree stand for 11 months.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2011.2166242