Global Positioning System (GPS) signals reflected from the ocean surface have potential use for various remote sensing purposes. Some possibilities are measurements of surface roughness characteristics from which wave height, wind speed and direction could be determined. For this paper, GPS reflected signal measurements taken from aircraft are used to explore the possibility of determining wind...

Automatic location identifications are required for emergency calls in Japan and many other countries. However, giving a reliable position promptly is a problem in places where the global positioning system (GPS) signal is extremely weak. We propose an acquisition scheme for assisted GPS (AGPS) architecture based on a timingsynchronized mobile network. System errors as well as code uncertainty ...

The alignment of the Laser Interferometer Gravitational-wave Observatory (LIGO) using the Global Positioning System (GPS) is described. The LIGO project is designed to detect gravitational waves from astrophysical sources by laser interferometry. There are two sites separated by 3002 km that will be operated in coincidence. At each, site laser beams propagate in two orthogonal 4 km long evacuat...

The alignment of the Laser Interferomter Gravitational-wave Observatory (LIGO) using the Global Positioning System (GPS) is described. The LIGO project is designed to detect gravitational waves from astrophysical sources by laser interferometery. There are two sites separated by 3002 km that will be operated in coincidence. At each, site laser beams propagate in two orthogonal 4 km long evacuat...

Assessment of physical fitness of endurance athletes is usually performed by means of standardized exercise protocols in specialized laboratories. The recent development of devices measuring heart rate, power output, speed, etc. raises the possibility to assess the fitness level from data collected on the field. We propose a model based on cardiac parameters identification on training activitie...

This project work presents the sensor fusion of Global Positioning System (GPS), Inertial Measurement Unit (IMU) and Odometry data from wheel encoders which is used to estimate localization of mobile robot. GPS, IMU, Wheel encoders are interfaced with MBED. Filters are used to remove erroneous noise from the data obtained from sensors. Low pass IIR filter is used for Differential Global Positio...

To position arbitrary outdoor measurements, the most common methods are the use of global positioning system (GPS) technology or distance tracking from reference locations. The system to be introduced here consists of a combination of an optical distance tracking system and a civil, autonomous GPS receiver. Through the application of a recursive filter, both components support and correct each ...

Snowshoe hares (Lepus americanus) are generally sedentary, but are likely to move among habitats frequently to gain access to spatially segregated food and cover. We investigated movement patterns of hares from 2 characteristic boreal habitats using very-high-frequency radio collars (n 1⁄4 300) monitored weekly and global positioning system (GPS) collars (n 1⁄4 18) programmed to record location...

Satellite radar interferometry (InSAR) can be applied to study vertically integrated atmospheric refractivity variations with a spatial resolution of 20 m and an accuracy of 2 mm, irrespective of cloud cover or solar illumination. The data are derived from the diierence between the radar signal delay variations within the imaged area during two acquisitions with a temporal separation of one or ...

The signals from the Global Positioning System (GPS) reflected from the ocean surface have been considered for bistatic GPS remote sensing to estimate parameters including wind speed and height and roughness of the ocean surface. A variety of models, methods, and experimental campaigns have verified the level of viability and reliability of the bistatic GPS radars. In this article, we analyse t...