Essays about: "SWEPOS"

Showing result 1 - 5 of 8 essays containing the word SWEPOS.

1. 1. 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. 2. Ionospheric Effect on GPS During Solar Maximum

   University essay from KTH/Fastigheter och byggande

   Author : Netsai Wiboonwipa; [2021]
   Keywords : GPS; Ionosphere; MS-TIDs; Polar cap patches; GPS; jonosfär; MS-TID; polarkåpor;

   Abstract : Ionospheric effects are one of the factors that can have negative impact on Global Navigation Satellite Systems (GNSS). Those effects can be called medium-scale traveling ionospheric disturbances (MS-TIDs) at middle latitude regions and polar cap patches at high latitude regions. READ MORE

4. 3. Ionospheric Models for GNSS Measurements

   University essay from KTH/Fastigheter och byggande

   Author : Carolina Offenbacher; Ellen Thornström; [2020]
   Keywords : GNSS; ROTI; TEC; ionospheric turbulence; GNSS; ROT; TEC;

   Abstract : There is an increasing demand for higher precision when using Global Navigation Satellite Systems, GNSS, for positioning. The measurement uncertainty depends on multiple factors and one of them is the ionosphere. READ MORE

5. 4. Network-RTK - A comparative study of service providers currently active in Sweden

   University essay from KTH/Geodesi och satellitpositionering

   Author : Daniel Sedell; [2015]
   Keywords : network-RTK; GNSS; Trafikverket; project based network-RTK; nätverks-RTK; GNSS; Trafikverket; projektanpassad nätverks-RTK;

   Abstract : Network-RTK is a method of relative measuring using GNSS that provides users in alarge area with an easy way obtaining low uncertainties in their measurements. Regularnetwork-RTK does not meet the requirements of the Swedish Transport Administration(STA) regarding its larger and/or more complex projects, leading to the concept ofproject-based network-RTK being introduced in Sweden by the STA, in collaborationwith the network-RTK service provider SWEPOS back in 2004. READ MORE

6. 5. Solar Cycles and the Accuracy and Precision of GNSS Measurements

   University essay from KTH/Geodesi och geoinformatik

   Author : Anton Hansson; [2013]
   Keywords : GNSS: measurement; surveying: solar cycle: solar activite: sunspot: accuracy: precision;

   Abstract : Today, GNSS (Global Navigation Satellite Systems) is a widely spread technology and are used in many different ways. GNSS is the collective name for American GPS, Russian Glonass and European Galileo and some other smaller navigation systems. READ MORE