[1] Across contractional orogens, the equivalency between decadal convergence rates from geodetic GPS data and geologic shortening rates at time scales of thousands or millions of years has rarely been documented. Here, we present an example from the northern margin of Chinese Pamir, where the Main Pamir Thrust is tectonically quiescent, and recent deformation is concentrated on the Pamir Front...

Ground subsidence can be caused by both natural and human-induced activities. In this paper, a radar remote sensing technique named Differential Interferometric SAR (D-InSAR) is introduced as means of monitoring the ground deformation caused by mining activities. D-InSAR and current geodetic technologies, such as GPS, are complementary in monitoring ground subsidence due to underground mining a...

Since GPS signals have very low received power levels (−130 dBm, or −160 dBW), their vulnerability to RF Interference (RFI) is a serious concern. This is particularly true for GPS-based safety-critical systems such as the Local Area Argumentation System (LAAS). The Stanford LAAS Integrity Monitor Testbed (IMT) is a prototype of a LAAS Ground Facility (LGF) that is composed of various monitors t...

The replacement I-35W bridge in Minneapolis saw less traffic than the original bridge though it provided substantial travel time saving for many travelers. This observation cannot be explained by the classical route choice assumption that travelers always take the shortest path. Accordingly, a boundedly rational route switching model is proposed assuming that travelers will not switch to the ne...

The future satellite positioning/navigation systems (i.e. GPS and Galileo) will provide civil signals on multiple frequencies, similar to those currently available for military purposes only. This paper presents a direct RF sampling front end design well suited for multiple frequency satellite navigation receiver design. No frequency downconversion is necessary; rather the particular frequency ...

This chapter focuses on the design of compact planar multiband antennas intended for exist‐ ing wireless services including LTE, GPS, GSM, PCS, DCS, GPS, UMTS, WLAN and Wi‐ MAX bands. The present techniques available in the open literature include the modification of the main radiator via bending, folding, meandering and wrapping. Each approach offers different advantages, depending on the requ...

This paper describes the design and the implementation of a novel tracking system that does not depends on the use of GPS-GSM tracking techniques or radar systems. The designed tracking system integrates both of wireless signals in VHF frequency band and laser beams to realize the tracking principle of an object movement, such as vehicles or pedestrian movement within any areas to determine its...

Autonomous fixed-wing UAV landing based on differential GPS is now a mainstream providing reliable and precise landing. But the task still remains challenging when GPS aviability is limited like for military UAV’s. We discuss a solution of this problem based on computer vision and dot markings along stationary or makeshift runway. We focus our attempts on using infrared beacons along with narro...

This paper describes the design of a compact, dual GPS frequency L1/L2, multi element adaptive antenna array, where each array element is comprised of an aperture coupled spiral slot array. In short, it is an array of arrays. The design of a seven element array is described. The design is quite different from existing CRPA antennas which use a stacked patch approach. The aperture coupled spiral...

The Ms8.0 Wenchuan earthquake occurred on May 12, 2008 in Wenchuan County, Sichuan Province, China. The devastating event caused a significant surface rupture and deformation in a large geographical area. This study intends to investigate the co-seismic surface deformations due to the main shock by integrating observations from interferometric synthetic aperture radar (InSAR) and global positio...