@article{fdi:010071290,
  title = {{A}ssessing the reliability and consistency of {I}ri{SAR} and {GNSS} data for retrieving 3{D}-displacement rapid changes, the example of the 2015 {P}iton de la {F}ournaise eruptions},
  author = {{P}eltier, {A}. and {F}roger, {J}. {L}. and {V}illeneuve, {N}. and {C}atry, {T}hibault},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n{SAR} and {GNSS} are now the best and most developed techniques in the {E}arth sciences to track deformation, especially in volcanology. {I}n this study, we assess the reliability and consistency of these two techniques for measuring 3-{D} ground displacements-and not only the displacement in the direction of the {I}n{SAR} {L}ine of {S}ight-on volcanoes during rapid changes. {T}he use of a large amount of satellite data ({X}, {C}, {L}-band as well as right and left looking acquisitions) made it possible to retrieve the 3-{D} displacement components with an unprecedented accuracy. {W}e carry out this evaluation on the {P}iton de la {F}ournaise volcano, where four eruptions occurred in 2015. {T}he comparison between {GNSS} and {I}n{SAR} allows us: (i) to describe the deformation pattern associated with these eruptions, (ii) to quantify the discrepancies between {I}n{SAR} and {GNSS}, and (iii) to discuss the limits and the complementarities of {I}n{SAR} and {GNSS}. {T}he ground deformation patterns associated with the four eruptions of {P}iton de la {F}ournaise in 2015 are typical of this volcano, with decimeter ground displacements asymmetrically distributed along the dike path, evidencing a preferential eastward motion, particularly visible thanks to the broad spatial coverage of {I}n{SAR} {E}xcept for the {NS} component, {I}n{SAR} and {GNSS} data are in overall agreement, with most of the {GNSS}-{I}n{SAR} residuals <2.5 cm and <5 cm on the {EW} and vertical component, respectively, i.e. within the error bar of the two methods. {M}ost of the discrepancies on the terminal cone can be attributed to uncorrected atmospheric effects in {I}n{SAR}. {O}ur study confirms the consistency and the complementarity of the two methods to characterize (i) the 3-{D} ground deformation distribution in high spatial resolution ({I}n{SAR}), and (ii) the dynamism ({GNSS}) associated with eruptive activity.},
  keywords = {{REUNION}},
  booktitle = {},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {344},
  numero = {{SI}},
  pages = {106--120},
  ISSN = {0377-0273},
  year = {2017},
  DOI = {10.1016/j.jvolgeores.2017.03.027},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071290},
}