Listar por tema "spatial resolution"

Mostrando ítems 1-6 de 6

    • closedAccess   25 Million Sensing Measurements Per Second Using Quasi-Integer Ratio Time-Expanded φOTDR 

      Soriano-Amat, Miguel; Martins, Hugo; Durán, Vicente; Martin-Lopez, Sonia; Gonzalez-Herraez, Miguel; Fernández Ruiz, María del Rosario Optica Publishing Group (2022)
      We demonstrate the detection of strain perturbations along a 500 m optical fiber with 2 cm spatial resolution and 1 kHz sampling frequency via quasi-integer-ratio time-expanded φOTDR, requiring less than 100 MHz photodetection ...

    • openAccess   DAT-CNN: Dual Attention Temporal CNN for Time-Resolving Sentinel-3 Vegetation Indices 

      Ibáñez Fernández, Damián; Fernandez-Beltran, Ruben; Pla, Filiberto; Yokoya, Naoto IEEE (2022-03-22)
      The synergies between Sentinel-3 (S3) and the forthcoming fluorescence explorer (FLEX) mission bring us the opportunity of using S3 vegetation indices (VI) as proxies of the solar-induced chlorophyll fluorescence (SIF) ...

    • closedAccess   Frequency Stability Requirements in Quasi-Integer-Ratio Time-Expanded Phase-Sensitive OTDR 

      Soriano-Amat, Miguel; Martins, Hugo; Durán, Vicente; Fermoso, Pablo; Martin-Lopez, Sonia; Gonzalez-Herraez, Miguel; Fernández Ruiz, María del Rosario IEEE (2023-01-15)
      Time-expanded phase sensitive (TE-ϕ)OTDR is a recently reported technique for distributed fiber sensing that relies on the use of an electro-optic dual frequency comb (DFC) scheme. A distinctive feature of this approach ...

    • openAccess   Sentinel-3 Super-Resolution Based on Dense Multireceptive Channel Attention 

      Fernández, Rafael; Fernandez-Beltran, Ruben; kang, jian; Pla, Filiberto IEEE (2021-07-16)
      The unprecedented availability of remote sensing data from different complementary Sentinel missions provides increasing opportunities to alleviate the spatial limitations of Sentinel-3 (S3) from an intersensor perspective. ...

    • openAccess   Sentinel-3/FLEX Biophysical Product Confidence Using Sentinel-2 Land-Cover Spatial Distributions 

      Fernandez-Beltran, Ruben; Pla, Filiberto; kang, jian; Moreno, Jose; Plaza, Antonio IEEE (2021-03-11)
      The estimation of biophysical variables from remote sensing data raises important challenges in terms of the acquisition technology and its limitations. In this way, some vegetation parameters, such as chlorophyll fluorescence, ...

    • openAccess   Time-Resolved Sentinel-3 Vegetation Indices Via Inter-Sensor 3-D Convolutional Regression Networks 

      Fernandez-Beltran, Ruben; Ibáñez Fernández, Damián; kang, jian; Pla, Filiberto Institute of Electrical and Electronics Engineers (2021-09-03)
      Sentinel missions provide widespread opportunities of exploiting inter-sensor synergies to improve the operational monitoring of terrestrial photosynthetic activity and canopy structural variations using vegetation indices ...