Google Timeline Geolocation Accuracy

Google Location History Timeline could be used in the future to track mobile devices of users with a Google account. The Department of Forensic Digital Technology in the Netherlands Forensic Institute might consider using it as available data for evidence in its investigations. A part of this research is to assess the accuracy of the locations...

Ionospheric monitoring using GNSS data from LEO satellites for space weather applications: (additional thesis)

In this report, a least-squares approach is described for retrieving the 3D structure of the electron concentration in the Earth’s upper ionosphere and plasmasphere, using Global Navigation Satellite System (GNSS) data-sets from Low-Earth-Orbiting (LEO) satellites. Due to the lack of horizontal radio wave geometries, the method uses assumptions...

Precipitable water vapour estimation using GPS in Uganda: Measuring and modelling the precipitable water vapour using single and dual frequency GPS receivers

Additional thesis - Precipitation and especially rainfall are very important for the world’s population. It has its positive and negative side like providing water and contrary causing floods. Therefore it is of utmost importance to make clear and accurate weather predictions. The revolution of GPS in the last few decades gave a new opportunity...

Precipitable water vapour estimation using GPS in Uganda: A study on obtaining the Zenith Wet Delay

Additional thesis - To improve weather monitoring, local near-real time weather forecasts and climate monitoring, a dense network of sensors should be set up. As shown already in the 1990s, GPS is a promising measurement device to form a dense network for meteorology observation. Because of economic reasons, a network of dual frequency GPS...

Next Generation Precise Satellite Positioning: Analysis of advanced positioning techniques with multiple navigation satellite systems using Curtin's PPP-RTK User Platform

Many different Global Navigation Satellite Systems (GNSS) are currently in orbit or are being deployed. Research on positioning techniques using these satellites is ongoing. The Curtin GNSS Research Centre has developed a software tool for further testing of these techniques. This thesis represents the testing done on the Curtin PPP-RTK User...

Spaceborne Remote Sensing for Near Eastern Archaeology: A case study on archaeological site-detection in Jordan's Black Desert

The Black Desert in the east of Jordan has recently gained attention in the archaeological domain due to the discovery of pre-historical structures and a vast amount of rockart depictions. The Department of Near Eastern Archaeology of the University of Leiden has started investigating the cultural developments within this area from c. 1000 BC to...

Estimation of slack tide using GPS measurements on a buoy: A case study on buoy 18 in the Schelde Estuary

In this paper I present a novel method to determine the time of occurrence of tidal slack with a GPS receiver mounted on an anchored buoy commonly used to delineate shipping lanes in estuaries and tidal channels. Slack tide occurs when the tide changes direction from ebb to flood flow, or from flood to ebb. The determination of this point in...