We present the commissioning results of the MicroChannel-Plate (MCP) based, ion extraction and detection system currently in use for an experimental test stand aimed at demonstrating the operation of a leastinterceptive transverse beam profile monitor based on a planar supersonic gas jet. This monitoring design features least-interceptive operation under excellent vacuum conditions and provides...

This paper describes a new and cost effective method of analyzing hard rock discontinuities from oriented core bore hole data. This algorithm uses multivariate cluster analysis to group discontinuities (joints) into sets based on orientation and spatial position (spacing) along the bore hole, and to display the data in a three dimensional stereonet. Although drift or surface exposure mapping da...

This paper presents a tightly-coupled integration of GPS observations and ultra-wideband ranges that accounts for systematic UWB errors in real-time using additional error states to augment an extended Kalman filter. Results of range measurements obtained using commercially available UWB radios in optimal line-of-sight conditions are compared to surveyed ranges using conventional methods to ass...

In this paper the performance of GPS timing under jamming conditions is evaluated in the context of a GPS jammer localization system that uses the TimeDifference-Of-Arrival (TDOA) technique. To investigate the performance of GPS timing receivers under jamming conditions, jammer signals of different types and powers were combined with real GPS signals and input into two timing receivers and the ...

Two-Way Satellite Time and Frequency Transfer (TWSTFT) links were first introduced to Coordinated Universal Time (UTC) generation in 1999. These TWSTFT links were calibrated by alignment with the corresponding GPS time links, of which the nominal uncertainty was 5 ns. In the past decade, the primary calibration technique for TWSTFT link calibrations was based on a TWSTFT mobile ground station (...

Many ad hoc network protocols and applications assume the knowledge of geographic location of nodes. The absolute position of each networked node is an assumed fact by most sensor networks which can then present the sensed information on a geographical map. Finding position without the aid of GPS in each node of an ad hoc network is important in cases where GPS is either not accessible, or not ...

Many ad hoc network protocols and applications assume the knowledge of geographic location of nodes. The absolute location of each networked node is an assumed fact by most sensor networks which can then present the sensed information on a geographical map. Finding location without the aid of GPS in each node of an ad hoc network is important in cases where GPS is either not accessible, or not ...

We present a combined cosmic shear analysis of the modeling line-of-sight distortions on strongly lensed extended arcs and galaxy shape measurements in COSMOS field. develop framework to predict covariance strong lensing basis small scale matter power-spectrum. The weak measurement is performed using data from survey calibrated with cloning scheme Ultra Fast Image Generator UFig (Berge 2013). b...

This paper proposes a novel architecture for ultra-tight integration of a High Sensitivity Global Positioning System (HSGPS) receiver with an Inertial Navigation System (INS), to address the issue of GPS tracking and positioning in degraded signal environments. By enhancing signal tracking loops in receivers through the use of optimal controllers/estimators and aiding from external source such ...