Sökning: "sea ice classification"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden sea ice classification.

  1. 1. Sea Ice Concentration Estimation and Ice Type Classification from Dual-Frequency Satellite Synthetic Aperture Radar

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Wiebke Aldenhoff; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; sea ice concentration; sea ice; SAR imaging; sea ice classification; Fram Strait;

    Sammanfattning : The sea ice cover in the Arctic has undergone dramatic changes in recent years. The perennial sea ice extent is decreasing by 12.2 % per decade while annual mean sea ice thickness has decreased by more than 2 m for the central Arctic Basin from 1975 to 2012. LÄS MER

  2. 2. Microwave remote sensing of arctic sea ice during freeze-up using radar and passive radiometry

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Mats I. Pettersson; [1995]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modelling; classification; SAR and SSM I; remote sensing; sea ice; microwave; radar backscattering;

    Sammanfattning : .... LÄS MER

  3. 3. Modelling Microwave Backscattering from Sea Ice for Synthetic-Aperture Radar Applications

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Anders Carlström; [1995]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synthetic-aperture radar; microwave; surface roughness; sea ice; backscattering models;

    Sammanfattning : The spaceborne synthetic-aperture radar (SAR) is considered one of the key instruments for monitoring the ice cover in polar oceans and regional seas. This thesis is concerned with applications of electromagnetic scattering theory and SAR system theory for modelling the response of different types of sea ice in SAR imagery. LÄS MER

  4. 4. Sar Remote Sensing of Sea Ice: Towards automatic extraction of geophysical information

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Yan Sun; [1995]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; classification; deformation; SAR; segmentation; cross-correlation; rotation; optical flow; motion detection;

    Sammanfattning : Synthetic Aperture Radar (SAR) images from the ERS-1 satellite have great potential for sea ice remote sensing due to its independence of daylight and clouds. The very high data rate of SAR (over 100 million bits per second) results in an enormous volume of data that threatens the ability of human interpreters. LÄS MER

  5. 5. Contribution to Wideband SAR Space-Time Processing, and Radar Remote Sensing of Sea Ice

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Mats I. Pettersson; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAR; clutter suppression; space time adaptive processing; backprojection; remote sensing; moving target detection; radar scattering; Antenna array; wide band; sea ice;

    Sammanfattning : Synthetic Aperture Radar (SAR) has the capability to map the Earth with high resolution and is used in both civilian and military applications. The development of SAR systems is going towards higher resolution. Today there are Wide Band (WB) SAR instruments that have a resolution actually smaller than the operating wavelength. LÄS MER