Search for dissertations about: "små satelliter"

Showing result 1 - 5 of 7 swedish dissertations containing the words små satelliter.

2. 1. Deployment Simulations of a Composite Boom for Small Satellites

   Author : Pau Mallol Parera; Gunnar Tibert; Keith Seffen; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; small satellites; deployable structures; high packaging ratio; composites; bi-stable; gravity off-loading system; små satelliter; utfällbara strukturer; kompakt ihoppackning; kompositer; bistabil; tyngdkraftskompenserande system;

   Abstract : The use of small satellites is rapidly growing, especially satellites with masses between 1 and 10 kg and few litres of volume. The main reasons are due to the low development time and cost. Electronics miniaturization and high density integration is enabling the small satellites class to perform more and better tasks and at a lower cost. READ MORE

4. 2. Concurrent Engineering of Small Satellites using Hardware-in-the-loop Simulations

   Author : Cristóbal Nieto-Peroy; Mathias Milz; Élcio Jeronimo de Oliviera; Giovanni Palmerini; Sergio Montenegro; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Concurrent Engineering; Hardware-in-the-loop Simulation; Small Satellite; CubeSat; Nanosatellite; Test-driven Development; Behavior-driven Development; Frictionless Platform; Floating Platform; Onboard space systems; Rymdtekniska system;

   Abstract : The miniaturization of spacecraft has brough the possibility of conducting space missions to a vast portion of private enterprises and scientific institutions. The inaccessibility of modest developers to the resources that governmental agencies and primary contractors utilize to develop conventional satellites has not been an obstacle for them to apply different, more agile and risk-seeking approaches. READ MORE

5. 3. GNSS hardware biases in code and carrier phase observables

   Author : Martin Håkansson; Milan Horemuz; Anna B. O. Jensen; Lambert Wanninger; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GNSS; GNSS positioning; hardware biases; phase biases; multi-GNSS; GPS; GLONASS; Galileo; BeiDou; satellite dependency; characterization; android; mass market; Group delay variations; nadir dependence; ionosphere modeling; ionospheric tomography; Geodesy and Geoinformatics; Geodesi och geoinformatik; Geodesi; Geodesy;

   Abstract : GNSS hardware biases appear in code and phase observations, and originates both from the receiver and satellite hardware. The presence of biases in GNSS observations might affect the accuracy in precise GNSS positioning applications, and might also be of relevance in other GNSS applications. READ MORE

6. 4. Studies of Volcanic Influence on Aerosols, Clouds and Climate

   Author : Johan Friberg; Ergonomi och aerosolteknologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; lowermost stratosphere; volcanic aerosol; upper troposphere; sulfurous aerosol; carbonaceous aerosol; ion beam analysis; volcanism; indirect effect; radiative forcing; direct effect; Stratosphere; Fysicumarkivet A:2016:Friberg;

   Abstract : This thesis focuses on the influence of volcanism on the compositions of the aerosols in the upper troposphere (UT) and lowermost stratosphere (LMS), and their direct and indirect impact on climate. Aerosol data were obtained by aircraft-borne sampling, using the CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container) platform, and laboratory-based ion beam analysis of aerosol samples at the Lund Ion Beam Analysis Facility (LIBAF). READ MORE

7. 5. Aerosol-Cloud-Precipitation Interactions - Studied using combinations of remote sensing and in-situ data

   Author : Moa Sporre; Ergonomi och aerosolteknologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; clouds; aerosol particles; climate; precipitation; satellite data; Fysicumarkivet A:2016:Sporre;

   Abstract : Cloud droplets never form in the atmosphere without a seed in the form of an aerosol particle. Changes in number concentrations of aerosol particles in the atmosphere can therefore affect the number of droplets in a cloud. READ MORE