Sergi Pons Freixes

Publications

• Design of a sensor network with adaptive sampling

  S. Pons, L. Ceccaroni, J. Piera

  01/2008

• Monolithic spectrometer for environmental monitoring applications

  S. Pons, IF Aymerich, E. Torrecilla, J. Piera

  OCEANS 2007-Europe. 01/2007;

• Effect of spectral resolution in hyperspectral data analysis

  E. Torrecilla, I.F. Aymerich, S. Pons, J. Piera

  01/2007

  The effect of hyperspectral data resolution on the results obtained using derivative spectroscopy is discussed in this article. A comparison was made between attenuation spectra measured using two different hyperspectral sensors with 3648 and 256 spectral bands, respectively. Smoothing and derivativ... [more] The effect of hyperspectral data resolution on the results obtained using derivative spectroscopy is discussed in this article. A comparison was made between attenuation spectra measured using two different hyperspectral sensors with 3648 and 256 spectral bands, respectively. Smoothing and derivative algorithms were applied to both types of spectral data in order to assess qualitative information from the spectral features of several laboratory samples. In order to make an optimal application of the derivative analysis, a suitable selection of the smoothing and derivating parameters was done according to the resolution of each type of hyperspectral data. Second derivative spectra were obtained and peaks related to the absorption bands of pigments present in the considered samples were identified in both cases. Furthermore, interpolation techniques were applied so as to match spectral resolutions of data collected by the two sensors and negligible variations in the positions of the peaks were achieved i

• Comparative response of two different hyperspectral sensors. Application to derivative analysis of absorption spectra

  E. Torrecilla, S. Pons, I.F. Aymerich, J. Piera

  Instrumentation ViewPoint. 01/2007; 6:86--87.

• Low cost hyperspectral device suitable for monitoring sensor networks

  S. Pons, I.F. Aymerich, E. Torrecilla, J. Piera

  Instrumentation ViewPoint. 01/2007; 6:60--61.

• Turbulent oceanic flow characterization derived from high-resolution CTD data processing

  R. Quesada, J. Piera, I. Fernández, E. Torrecilla, S. Pons

  Instrumentation ViewPoint. 01/2005; 4:31--32.

• An instrumentation project for studying the effects of turbulence in aquatic systems

  J. Piera, R. Quesada, E. Torrecilla, I. Fernández, S. Pons

  Instrumentation ViewPoint. 01/2005; 4:30--31.

• Characterization of the water optical properties using hyperspectral sensors

  E. Torrecilla, J. Piera, R. Quesada, I. Fernández, S. Pons

  Instrumentation ViewPoint. 01/2005; 4:48--49.

• Control of Monolithic Spectrometer: Applications for environmental monitoring

  J. Piera, S. Pons, M. Merchan, R. Quesada

  Instrumentation ViewPoint. 01/2004; 4:8--9.