Sökning: "radar scattering"

Visar resultat 6 - 10 av 21 uppsatser innehållade orden radar scattering.

  1. 6. A Historic Record of Sea Ice Extents from Scatterometer Data

    Master-uppsats, KTH/Geoinformatik

    Författare :Inès Otosaka; [2017]
    Nyckelord :sea ice; radar scattering; scatterometer;

    Sammanfattning : Sea ice is a vital component of the cryosphere and does not only influence the polar regions but has a more global influence. Indeed, sea ice plays a major role in the regulation of the global climate system as the sea ice cover reflects the sun radiation back to the atmosphere keeping the polar regions cool. LÄS MER

  3. 7. Radardetektering av stålämnen med hjälp av UWB-radar

    Kandidat-uppsats, Högskolan i Gävle/Elektronik

    Författare :Billy Thunberg; Kalle Kurttio; [2016]
    Nyckelord :UWB-radar; PRBS; cross-correlation; ability to penetrate; detection capability; Hilberttransform; furnaces; billets; reference measurement; target measurement; UWB-radar; PRBS; korskorrelation; penetrerande förmåga; detektionsförmåga; Hilberttransform; omvärmningsugn; stålämnen; referensmätning; målmätning;

    Sammanfattning : Stålindustrierna Sandvik, Sandviken och SSAB, Borlänge tillverkar billets (kvadratiska ochlångsmala stålämnen). Vid tillverkningen av billets förflyttas stålämnena stegvis i ugnensamtidigt som de hettas upp. När stålämnena når slutet av ugnen lyfts de ur av en externmaskin. LÄS MER

  4. 8. Multiple electromagnetic scattering by spheres using the T-matrix formulation

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Marina Wallin; [2015]
    Nyckelord :T-matrix; Multiple scattering; RCS; FDTD; Electromagnetic scattering; Mie scattering;

    Sammanfattning : Low observable technology is used in order to prevent detection, or to delay detection. Radar cross section is an important parameter in aircraft survivability since it measures how detectable an object is with radar. To find the radar cross section Maxwell's equations are solved numerically in the time-domain using a finite difference scheme. LÄS MER

  5. 9. Mapping of Water under a Part of the Greenland Ice Sheet Using Ice-Penetrating Radar

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Anna Svensson; [2015]
    Nyckelord :Greenland; hydrology; radar; attenuation; reflectivity; CMP; Grönland; hydrology; radar; dämpning; reflektivitet; CMP;

    Sammanfattning : The contribution to the global sea level change from the large ice sheet of Greenland and Antarctica if both ice sheet where to melt completely, is estimated to be approximately 70 meters. How much the actual contribution would be, is due to complex ice dynamics still unclear. LÄS MER

  7. 10. Interaction between Metallic Microparticles and Mesospheric Plasma

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Hannes Lindström; Michael Nivala Fernberg; [2014]
    Nyckelord :;

    Sammanfattning : SCRAP is a student experiment that aims to validate theories on electron density fluctuations induced by the presence of dust particles connected to the phenomenon of polar mesospheric summer echoes (PMSE). Radar echoes are to be measured from a dust cloud of metallic microparticles released into the mesosphere above northern Sweden using a sounding rocket in spring 2015. LÄS MER