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International Polar Year 2007–2008 - WMO

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Fig. 3.1-4. Maps<br />

of Perito Moreno<br />

glacier (Argentina)<br />

velocity field using<br />

ASI COSMO-SkyMed<br />

constellation spotlight<br />

images (prepared by<br />

Luca Pietranera and<br />

Achille Ciappa, e-GEOS).<br />

The velocity field has<br />

been extracted from<br />

spotlight images pairs<br />

acquired on 2 and<br />

18 February, 2009<br />

(detected by COSMO-1<br />

with a time interval<br />

of 16 days and pixel<br />

resolution of 1 meter)<br />

(upper) and on 6 and 14<br />

March, 2009 (detected<br />

by COSMO-1 and<br />

COSMO-2 with a time<br />

interval of 8 days, 1 m,<br />

resolution) (lower). High<br />

speeds occur along<br />

the centre slope of the<br />

glacier tip while slow<br />

speeds are located<br />

along the lateral sides.<br />

End-of-summer speeds<br />

are higher than midsummer<br />

speeds.<br />

(Courtesy: Agenzia Spaziale<br />

Italiana, 2009)<br />

o b s e r v I n g s Y s t e m s a n d d a t a m a n a g e m e n t 365

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