@article{PAR00000138,
  title = {{S}urface motion of mountain glaciers derived from satellite optical imagery},
  author = {{B}erthier, {E}. and {V}adon, {H}. and {B}aratoux, {D}. and {A}rnaud, {Y}ves and {V}incent, {C}. and {F}eigl, {K}.{L}. and {R}emy, {F}. and {L}egresy, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} complete and detailed map of the ice-velocity field on mountain glaciers is obtained by cross-correlating {SPOT}5 optical images. {T}his approach offers an alternative to {SAR} interferometry, because no present or planned {RADAR} satellite mission provides data with a temporal separation short enough to derive the displacements of glaciers. {T}he methodology presented in this study does not require ground control points ({GCP}s). {T}he key step is a precise relative orientation of the two images obtained by adjusting the stereo model of one "slave" image assuming that the other "master" image is well georeferenced. {I}t is performed with numerous precisely-located homologous points extracted automatically. {T}he strong ablation occurring during summer time on the glaciers requires a correction to obtain unbiased displacements. {T}he accuracy of our measurement is assessed based on a comparison with nearly simultaneous differential {GPS} surveys performed on two glaciers of the {M}ont {B}lanc area ({A}lps). {I}f the images have similar incidence angles and correlate well, the accuracy is on the order of 0.5 m, or 1/5 of the pixel size. {S}imilar results are also obtained without {GCP}s. {A}n acceleration event, observed in early {A}ugust for the {M}er de {G}lace glacier, is interpreted in term of an increase in basal sliding. {O}ur methodology, applied to {SPOT}5 images, can potentially be used to derive the displacements of the {E}arth's surface caused by landslides, earthquakes, and volcanoes. (c) 2004 {E}lsevier {I}nc. {A}ll rights reserved.},
  keywords = {mountain glaciers ; surface displacement ; {SPOT}5 ; cross correlation ; satellite optical images},
  booktitle = {},
  journal = {{R}emote {S}ensing of {E}nvironment},
  volume = {95},
  numero = {1},
  pages = {14--28},
  ISSN = {0034-4257},
  year = {2005},
  DOI = {10.1016/j.rse.2004.11.005},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00000138},
}