Projecte llegit
Títol: Dual-frequency smartphones for ionospheric research
Estudiants que han llegit aquest projecte:
CORS ESPINAL, ÀUREA (data lectura: 11-02-2021)- Cerca aquest projecte a Bibliotècnica
CORS ESPINAL, ÀUREA (data lectura: 11-02-2021)Director/a: ESTEVE ELFAU, LUIS
Departament: FIS
Títol: Dual-frequency smartphones for ionospheric research
Data inici oferta: 24-07-2020 Data finalització oferta: 24-03-2021
Estudis d'assignació del projecte:
- GR ENG SIST AEROESP
| Tipus: Individual | |
| Lloc de realització: EETAC | |
| Paraules clau: | |
| Gps, Gnss, Space weather applications, Signal Processing | |
| Descripció del contingut i pla d'activitats: | |
| L'objectiu principal del treball és l'estudi del processament
dels senyals GNSS per a la recerca ionosfèrica. Aquest estudi es pretén dur a terme mitjançant l'anàlisi comparativa de dos receptors dual-frequency, un geodetic i un smartphone, els quals permetran estudiar pertorbacions de senyals produïdes degut als diferents fenòmens meteorològics com ara tempestes, entre d'altres, a banda de determinar la densitat d'electrons en una zona concreta de la ionosfera. Durant la realització del projecte, a més, s'obtindran coneixements sobre el funcionament de la navegació GNSS, sobre com la ionosfera afecta a la recepció dels senyals que aquests sistemes proporcionen i sobre com explorar aquests efectes per a obtenir un coneixement físic sobre l'entorn espacial. |
|
| Overview (resum en anglès): | |
|
In the last decade, smartphones have become an essential tool in our daily life. Besides its key and common uses, much more applications can be extracted from them. Ionospheric research traces back several years, and it is still a trending field in research, growing fast with the frequent release of new satellites. The aim of this work is to see if Xiaomi Mi8, the world¿s first dual-frequency smartphone, provides sufficient quality in its GNSS signals to achieve some fine accuracy values to validate the signals and make them usable. The thesis consists mainly of two different, but related objectives. At first, Xiaomi Mi8 smartphone¿s capability and quality of the received and measured signals it is studied, while comparing it with a geodetic receiver, the Trimble R9, both essentially co-located with several decimeters distance between them. As displayed in the results section, the observable satellite measurements, carrier phase and pseudorange, from one receiver to another do not diverge much from each other, indicating that besides the notable noise held in the smartphone¿s signals, the smartphone is a cheaper and a good alternative to geodetic receivers, commonly used for collecting those measurements. Secondly, TEC measurements from signals collected from both receivers are computed, analyzed, and compared with some TEC maps extracted from Madrigal Geospace Database. Some unexpected results arose from the smartphone¿s measurements, bringing this thesis to conclude that the noise embedded in the Xiaomi Mi8 receiver's pseudorange measurements are much higher than the actual raw measurements, making the pseudorange indistinguishable from the noise. Anyhow, some alternative methodology is finally proposed in order to solve the problem and discern if smartphones are or not capable for TEC determination and ionospheric research. |
|