Essays about: "ESA"

Showing result 21 - 25 of 82 essays containing the word ESA.

  1. 21. Spatial Variability in the Ionosphere and GNSS Signal Delays in the L-band: A Direct Comparison of In-Situ Satellite- and Swepos-Data

    University essay from Uppsala universitet/Institutionen för fysik och astronomi; Uppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen

    Author : Oscar Suneson; [2021]
    Keywords : fysik; jonosfären; GNSS; GPS; astrofysik; navigationssystem; mätteknik;

    Abstract : It has been shown that ionospheric irregularities can disturb our GNSS (Global Navigation Satellite System) communication. This disturbance is caused by scintillation of the radio signals when they pass through the ionosphere, leading to lock-on difficulties or in worst case, a loss of position for the GNSS-receiver. READ MORE

  3. 22. Markov Chain Monte Carlo (MCMC) and Bayesian Inference for Gravitational Waves

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Christine Andersson; [2021]
    Keywords : Gravitational Waves; LISA; LISA mission; Bayesian Inference; Markov Chain Monte Carlo; MCMC; Bayes’ Theorem; stochastic sampling; Metropolis Hastings; histograms; Physics and Astronomy;

    Abstract : The Laser Interferometer Space Antenna (LISA) is a space borne gravitational wave detec- tor set to launch in 2034, with the objective of detecting and studying the Gravitational Waves (GWs) of our universe. So far, ground-based detectors such as the Laser Interferometer Gravitational-Wave Observatory (LIGO) have been successful in detecting GWs, but the limitations of ground based detectors is what makes LISA so special. READ MORE

  4. 23. Agriculture monitoring using satellite data

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Graff Erik; [2021]
    Keywords : Sentinel; satellite; agriculture; monitoring; dynamic time warping; remote sensing;

    Abstract : As technology advances, the possibility of using satellite data and observations to aid inagricultural activities comes closer to reality. Swedish farmers can apply for subsidies for their land in which crop management and animal grazing occurs, and every year thousands of manual follow-up checks are conducted by Svenska Jordbruksverket (Swedish Board of Agriculture) to validate the farmers’ claims to financial aid. READ MORE

  5. 24. Concurrent Engineering and Generative Design Methodologies Applied to the Design and Analysis of a Future Space Mission Using COMET

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Paloma Maestro Redondo; [2021]
    Keywords : Concurrent Engineering; Concurrent Design; CDF; Generative Design; SpaceMaster; Space System Engineering; Feasibility Studies;

    Abstract : Concurrent Design studies have become of great importance in the space industry reducing the time and costs associated to the feasibility assessments for future space missions. This has also helped companies and space agencies to be at the forefront of this fast-developing sector. READ MORE

  6. 25. Particle Trajectory Simulations for SCIENA-N : Conversion surface design for an ENA sensor head

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Anja Möslinger; [2021]
    Keywords : ENA sensor; plasma; comets;

    Abstract : This thesis serves as a preliminary design study for the combination of a flight-proven ion optics system (SWIM) with a conversion surface to create a small energetic neutral atom (ENA) sensor. It is planned to use this sensor as ENA sensor for the DFP-SCIENA instrument on Comet Interceptor. READ MORE