Development of sensor system for autonomous quadcopter cartographer by Ang, Aaron Jia Jun

“…However, the same method cannot be used for indoor environments, because of the lack of GPS signals. This project, carried out by three people in a team, aims to design and create a quadcopter that will be able to perform autonomous SLAM and exploration algorithms using an on-board computer, while maintaining a small footprint and carry a minimal set of sensory equipment. …”
Get full text

SISTEM PELAPORAN PERITUNGAN JUMLAH PENUMPANG BUS VIA SMS BERBASIS ARDUINO UNO by , DODDY SURYO PERMADI, , Muhammad Arrofiq, S.T., M.T., Ph.D

“…However, this system still has many weaknesses, which depends on the condition of GSM and GPS signals.…”

Ionospheric correction and ambiguity resolution in DGPS with single frequency. by Ya’acob, Norsuzila, Abdullah, Mardina, Ismail, Mahamod, Jusoff, Kamaruzaman

“…The free electron distributed in the atmospheric region known as the ionosphere produces a frequency dependent effect on the Global Positioning System (GPS) signals, a delay in the pseudorange and advance in the carrier phase. …”
Get full text

Kinematic GPS survey as validation of LIDAR strips accuracy by C. Gordini, M. Barbarella

“…Many problems arose during the survey: difficulties in receiving the GPS signal, complex terrain features and unfavorable atmospheric conditions. …”
Get full text

Influence of solar radiation on ionosphere over India by P. Chaithra, B. Ramesh Krishna, Nagaraja Kamsali

“…Ionospheric TEC variations are studied by measuring the degree to which satellite-sent GPS signals are disrupted. The results were compared with geomagnetic measurements such as disturbed storm time (Dst) index and planetary K-index (Kp) and analyzed with TEC anomalies during geomagnetic storms, and the results may be used to estimate the magnetic field of the Earth. …”
Get full text

Localization Error Modeling for Autonomous Driving in GPS Denied Environment by Feihu Zhang, Zhiliang Wang, Yaohui Zhong, Liyuan Chen

“…As Global Position System (GPS) signals are often susceptible to interference or even not fully available, odometry sensors can precisely calculate positions in urban environments. …”
Get full text

Motion Mode Recognition and Step Detection Algorithms for Mobile Phone Users by Gérard Lachapelle, Valérie Renaudin, Melania Susi

“…However, MEMS cannot allow accurate autonomous location without external updates, e.g., from GPS signals, since their signals are degraded by various errors. …”
Get full text

GPS for high resolution positioning by Liau, Zi Hong

“…The accuracy of GPS coordinates in an urban canyon environment is reduced due to the GPS signals reflecting off high-rise buildings. GPS coordinates of a device could end up in another location away from the user. …”
Get full text

WiFi-based indoor localization by Wong, Shi Heng

“…While existing positioning technology such as the Global Positioning System (GPS) works sufficiently well in outdoor environments, the absence of GPS signals in indoor environments meant that it is not a feasible solution. …”
Get full text

A lunar GPS network by Teo, Bryan Da You

“…This study will also look at the feasibility of receiving GPS signal from Earth orbit on the moon. It will also explore the signal strength and antenna gain needed for receiving existing GPS signals, aa well as utilising satellites on Lunar orbit as a relay for systems on the ground.…”
Get full text

Development of nanosatellite-GPS subsystem by Liew, Casey Xia Xing.

“…Lastly, there will be a study and implementation of acquisition and tracking GPS signals through the usage of software, Matlab. The purpose of acquisition is to find the Coarse/Acquisition code phase and Doppler frequency of the GPS signal so that it can be used in the tracking. …”
Get full text

Design of a navigation and localization system for an AI-enabled underwater robot by Wong, Kelvin Jin Tong

“…In underwater environment, the complexity for navigation of unmanned underwater vehicle’s increase exponentially because of the working environment and the constraint on GPS signals. Thus, the cost for navigation and localization systems for underwater operation has been consistently high and has limits the use for small and medium-sized enterprises. …”
Get full text

APLIKASI INFORMASI DAN PEMANDU WISATA DIGITAL SITUS - SITUS CANDI DI KABUPATEN SLEMAN BERBASIS ANDROID by , HENDRA PERMANA, , Ma�un Budiyanto, S.T., M.T.

“…This application only need the Internet connection and GPS signals, so it is very easy to use. Turn on the GPS and Internet Connection on the android mobile smartphone, then enjoy the features of Seribu Candi application.…”

Colour constancy feature detection and matching technique for WLAN/Camera indoor positioning system by Wan Bejuri, Wan Mohd. Ya'akob

“…The location determination system in a changing environment, especially in an indoor environment can be very challenging if Global Positioning System (GPS) signals are blocked. It is necessary to combine or integrate multiple sensors and positioning methods in order to provide better location determination service to detect these signals. …”
Get full text

Autonomous Navigation of a Forestry Robot Equipped with a Scanning Laser by Fida Ben Abdallah, Anis Bouali, Pierre-Jean Meausoone

“…The poplar forest is considered as a semi-structured environment where the dense canopy prevents the use of GPS signals and laser sensors are often preferred to localize the vehicle. …”
Get full text

Data Fusion Algorithms for Multiple Inertial Measurement Units by Gérard Lachapelle, Jared B. Bancroft

“…Data was collected in two environments, one where GPS signals are moderately attenuated and another where signals are severely attenuated. …”
Get full text

Indoor Localization With an Autoencoder-Based Convolutional Neural Network by Hatice Arslantas, Selcuk Okdem

“…Global Navigation Satellite System (GPS) signals do not provide sufficient location data indoors because they are interrupted or completely lost in closed areas. …”
Get full text

Multi-Channel Target Shadow Detection in GPS FSR by Kabakchiev Hristo, Garvanov Ivan, Behar Vera, Kabakchieva Dorina, Kabakchiev Kalin, Rohling Hermann, Kulpa Krzysztof, Yarovoy Alexander

“…The paper offers new application of a Multi-channel Forward Scatter Radar (MFSR), which uses GPS signals for detection of air targets on their GPS radio shadows. …”
Get full text

NFC Internal: An Indoor Navigation System by Busra Ozdenizci, Vedat Coskun, Kerem Ok

“…Indoor navigation systems have recently become a popular research field due to the lack of GPS signals indoors. Several indoors navigation systems have already been proposed in order to eliminate deficiencies; however each of them has several technical and usability limitations. …”
Get full text

Improved Multi-GNSS PPP Software for Upgrading the DEMETRA Project Time Monitoring Service by Wei Huang, Pascale Defraigne, Giovanna Signorile, Ilaria Sesia

“…The advantages of these updates are demonstrated: Combining the Galileo and global positioning system (GPS) signals for PPP time transfer will further improve the frequency stability inside the computation batch; PPP with receiver clock constraint is not only used to reduce the short-term noise of the clock measurements but can also be used for some specific applications to a keep continuous clock solution in the computation batch or retrieve correct clock measurements from extremely noisy environments; the integer PPP allows a continuous clock solution, and improves the mid-term and long-term stability of the frequency transfer compared to the current PPP frequency transfer techniques.…”
Get full text