This paper investigates the use of carrier-phase differential GPS (CDGPS) for race car applications. In particular, experimental results are presented to demonstrate the use of CDGPS to accurately measure several key parameters of a test vehicle, including the inertial velocity, side-slip, and its precise location. This data is useful as a driver’s coaching tool because it can be used to determ...

The current low temperatures and pressures at the martian surface are not conducive to the stability of liquid water; hence the discovery of recently active, fluvial-like gullies [1, 2] presents an apparent paradox: how can these fluvial landforms have occurred if water is not stable at the surface? To approach this problem we have compared the morphometric properties of gullies in various sett...

In a gravel pit (SE Vienna basin), metre-thick bedded successions of conglomerate and sand layers of Miocene age are exceptionally well exposed along a W-E-striking wall. The sediments are cut by numerous N-Sstriking, high-angle normal faults. The faults have a marked displacement gradient and offset marker layers of up to several metres. Using ground penetrating radar, we measured ten sections...

Formation flying is a key technology for deep space and orbital applications that involve multiple spacecraft operations. Imaging and remote sensing systems based on radio interferometry and SAR require very precise (subwavelength) aperture knowledge and control for accurate relative data collection and processing. Closely tied with the Orion and TechSat21 projects, this work describes the ongo...

An experimental technique is being developed for mapping the normal mode field and its wavenumber spectrum as a function of position in a complex, shallow-water waveguide environment whose acoustic properties vary in three spatial dimensions. By describing the spatially varying spectral content of the modal field, the method provides a direct measure of the propagation characteristics of the wa...

A prototype precise augmented reality (PAR) system that uses carrier phase differential GPS (CDGPS) and an inertial measurement unit (IMU) to obtain sub-centimeter level accurate positioning and degree level accurate attitude is presented. Several current augmented reality systems and applications are discussed and distinguished from a PAR system. The distinction centers around the PAR system’s...

As one of soil dynamics properties, soil moisture content is an important factor of soil fertility which counts for much to crop growth situation and scientific irrigation management. A design plan of regional spatial variation of soil moisture measurement was introduced. Its main job includes the use of differential GPS technology for each sampling points in farmland, collecting data of high-p...

This report describes development of technologies that can assist a driver with safe lanekeeping in the event that the driver is incapacitated due to fatigue. We use a Differential GPS system to sense the position and velocity of the vehicle since it appears that this method offers adequate precision with a low enough infrastructure cost to make the system practical in most rural settings. We h...