Avancerad sökning

Visar resultat 1 - 5 av 516 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Dynamical aspects of coherent eddies in the North Atlantic Ocean : Insights from Satellite Observations

    Författare :Arunraj Kondetharayil Soman; Léon Chafik; Johan Nilsson; Caroline Katsman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Eddy detection and tracking; Ocean heat content; Satellite altimetry; Lagrangian Trajectories; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Sammanfattning : Oceanic mesoscale eddies, often referred to as the “weather of the ocean”, have horizontal scales of O(10) − O(102) kilometers and timescales spanning days to months. These structures comprise a complex system of coherent eddies (meaning they retain their shape and structure over time and space), filaments, and spirals that influence the transport of heat, salt, and nutrients in the ocean. LÄS MER

  3. 2. On Satellite Gravity Gradiometry

    Författare :Mehdi Eshagh; Lars Erik Sjöberg; Zdenek Martinec; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; satellite orbit; atmosphric desity model; lateral density variation; validation downward continuation; joint inversion; ring modification; Earth sciences; Geovetenskap;

    Sammanfattning : .... LÄS MER

  4. 3. The GLAST Satellite Calorimeter

    Författare :Georg Johansson; Avdelningen för Biomedicinsk teknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GLAST; CsI Tl crystals; electromagnetic calorimeter; hodoscopic assembly; satellite-born detector; Dark Matter; cosmic gamma radiation;

    Sammanfattning : The Gamma Ray Large Area Space Telescope (GLAST) is a multi-national satellite mission with aim to study the high-energy gamma ray sky. The main instrument is the Large Area Telescope (LAT) that consists of 16 towers, each housing a silicon strip precision tracker and a CsI(Tl) calorimeter. LÄS MER

  5. 4. A Software-Defined Baseband for Satellite Ground Operations : Feasibility and Design

    Författare :Moses Browne Mwakyanjala; Jaap van de Beek; Élcio Jeronimo de Oliviera; Jaan Praks; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Software-Defined Radios; Satellite Ground Operations; Satellite Telemetry; Command; and Tracking; Onboard space systems; Rymdtekniska system;

    Sammanfattning : Satellite telemetry, tracking, and command (TT&C) is a crucial activity needed to maintainthe health of a spacecraft or sometimes to facilitate payload data download. TT&Cground operations are facilitated by a communication device known in the TT&C communityas a baseband. LÄS MER

  7. 5. Satellite measurements and climate modelling of water in the tropical upper troposphere

    Författare :Marston Sheldon Johnston; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Model; Satellite; Climate; Humidity; Radiation; Tropics;

    Sammanfattning : The International Panel on Climate Change (2007) has identified key areas of uncertainty with regards to future climate change, e.g., the upper troposphere. A portion of the uncertain- ties come from climate models and this makes model accuracy very important. LÄS MER