Search for dissertations about: "GNSS"
Showing result 11 - 15 of 47 swedish dissertations containing the word GNSS.
-
11. Secure GNSS-based Positioning and Timing : Distance-Decreasing attacks, fault detection and exclusion, and attack detection with the help of opportunistic signals
Abstract : With trillions of devices connected in large scale systems in a wired or wireless manner, positioning and synchronization become vital. Global Navigation Satellite System (GNSS) is the first choice to provide global coverage for positioning and synchronization services. READ MORE
-
12. GNSS Radio Occultation Inversion Methods and Reflection Observations in the Lower Troposphere
Abstract : GNSS Radio Occultation (GNSS-RO) is an opportunistic Earth sensing technique where GNSS signals passing through the atmosphere are received in low Earth orbit and processed to extract meteorological parameters. As signals are received along an orbit, the measured Doppler shift is transformed to a bending angle profile (commonly referred to as bending angle retrieval), which, in turn, is inverted to a refractivity profile. READ MORE
-
13. Effects of Small-Scale Ionospheric Irregularities on GNSS Radio Occultation Signals : Evaluations Using Multiple Phase Screen Simulator
Abstract : Radio Occultation (RO) is a remote sensing technique which uses Global Navigation Satellite System (GNSS) signals tracked by a Low-Earth Orbit (LEO) satellite to sound the earth's atmosphere both in low (troposphere, stratosphere) and high (ionosphere) altitudes. GNSS-RO provides global coverage and SI traceable measurements of atmospheric data with high-vertical resolution. READ MORE
-
14. Algorithm development for multistatic GNSS radar technology
Abstract : Bistatic GNSS radar has received increased attention in recent years within both the radar and the GNSS communities. Its major advantages are that it has complete earth coverage and that more information is available due to the geometric diversity of the transmitters. READ MORE
-
15. Optimal Design in Geodetic GNSS-based Networks
Abstract : An optimal design of a geodetic network helps the surveying engineers maximise the efficiency of the network. A number of pre-defined quality requirements, i.e. precision, reliability, and cost, of the network are fulfilled by performing an optimisation procedure. READ MORE