@article{fdi:010071340,
  title = {{L}ow-cost {GPS} receivers for the monitoring of sunflower cover dynamics},
  author = {{Z}ribi, {M}. and {M}otte, {E}. and {F}anise, {P}ascal and {Z}ouaoui, {W}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he aim of this research is to analyze the potential use of {G}lobal {N}avigation {S}atellite {S}ystem ({GNSS}) signals for the monitoring of in situ vegetation characteristics. {A}n instrument, based on the use of a pair of low-cost receivers and antennas, providing continuous measurements of all the available {G}lobal {P}ositioning {S}ystem ({GPS}) satellite signals is proposed for the determination of signal attenuation caused by a sunflower cover. {E}xperimental campaigns with this instrument, combined with ground truth measurements of the vegetation, were performed over a nonirrigated sunflower test field for a period of more than two months, corresponding to a significant portion of the vegetation cycle. {A} method is proposed for the analysis of the signal attenuation data as a function of elevation and azimuth angles. {A} high correlation is observed between the vegetation's water content and the {GPS} signals attenuation, and an empirical modeling is tested for the retrieval of signal behavior as a function of vegetation water content ({VWC}). {T}he {VWC} was estimated from {GNSS} signals on a daily basis, over the full length of the study period.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {S}ensors},
  numero = {},
  pages = {art. 6941739 [10 p.]},
  ISSN = {1687-725{X}},
  year = {2017},
  DOI = {10.1155/2017/6941739},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071340},
}