Sökning: "SAR imaging"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden SAR imaging.

  1. 1. Sea Ice and Ocean Environmental Applications of Spaceborn SAR

    Författare :Sverre Thune Dokken; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Radarsat; SSM I; ERS-1 2; ocean applications; sea ice applications; numerical models; SAR; Arctic Ocean; Envisat; climate change;

    Sammanfattning : The worldwide focus on our changing environment has led to an increased need to observe and characterise a range of environmental phenomena. The Arctic Ocean is particularly sensitive to climate variations. LÄS MER

  2. 2. Urban Land-cover Mapping with High-resolution Spaceborne SAR Data

    Detta är en avhandling från Stockholm : KTH

    Författare :Hongtao Hu; Yifang Ban; Johan Fransson; [2010]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; High-resolution; RADARSAT-1 SAR; RADARSAT-2 SAR; Urban Land Cover; Object-based Classification; Neural Network; Support Vector Machines.; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING Area technology Remote sensing; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING Areell teknik Fjärranalys;

    Sammanfattning : Urban areas around the world are changing constantly and therefore it is necessary to update urban land cover maps regularly. Remote sensing techniques have been used to monitor changes and update land-use/land-cover information in urban areas for decades. Optical imaging systems have received most of the attention in urban studies. LÄS MER

  3. 3. Estimation Problems in Array Signal Processing, System Identification, and Radar Imagery

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Richard Abrahamsson; Peter Stoica; A. Lee Swindlehurst; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Parameter Estimation; Array Signal Processing; STAP; SAR; Ground Penetrating Radar; System Identification; Bilinear Models; Covariance Matrix Estimation; TECHNOLOGY Information technology Signal processing; TEKNIKVETENSKAP Informationsteknik Signalbehandling; Signal Processing; Signalbehandling;

    Sammanfattning : This thesis is concerned with parameter estimation, signal processing, and applications.In the first part, imaging using radar is considered. More specifically, two methods are presented for estimation and removal of ground-surface reflections in ground penetrating radar which otherwise hinder reliable detection of shallowly buried landmines. LÄS MER

  4. 4. 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

  5. 5. Development and evaluation of SAR algorithms for image formation and speed estimation in wideband SAR

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Thomas Sjögren; ; [2010]

    Sammanfattning : Remote sensing and surveillance are the main application areas for radar in general and synthetic aperture (SAR) radar in particular. Since the first radar system built by Hülsmeyer in 1904, radar has developed so that it is now able to create images from a large distance. LÄS MER