Due to the extremely low power, GPS signal can be easily affected by interferences. In this paper, from the point of adaptive array processing, we review the existing spatial and space-time interference suppression methods which attempt to mitigate interferences before the GPS receiver performs correlation. These methods comprise self-coherence restoral technique based on the nature of GPS sign...

Due to the extremely low power, GPS signal can be easily affected by interferences. In this paper, from the point of adaptive array processing, we review the existing spatial and space-time interference suppression methods which attempt to mitigate interferences before the GPS receiver performs correlation. These methods comprise self-coherence restoral technique based on the nature of GPS sign...

To achieve reliable GPS positioning results a realistic stochastic model for GPS carrier phase observations has to be specified for data processing. In order to develop such a stochastic model, the quality characteristics of GPS carrier phase measurements made by a receiver must be well understood. Recently investigators have used two types of data, Signal-to-Noise Ratio (SNR) and satellite ele...

High Rate / Low Latency GPS ground measurements for the GPS occultation experiment of the Challenging IV&risatellite Payload (CHAMP) mission are provided by a dedicated global tracking network. The r&work. is being established jointly by GF?Z and Jet Propulsion Latmratory (JPL) to ensure adequate ground d@a auail&iIity for processing of globally distributed GPS qccultadon events. GFZ operates a...

First results from the GPS radio occultation experiment aboard the German CHAMP satellite are presented. The agreement between observed temperature profiles in the upper troposphere and the lower stratosphere and temperature profiles obtained from meteorological analyses is found to be below 1 K. The data processing and analysis system (operated by GeoForschungsZentrum Potsdam) has been success...

Snowpacks provide reservoirs of freshwater. The amount stored and how fast it is released by melting are vital information for both scientists and water supply managers. GPS multipath reflectometry (GPS-MR) is a new technique that can be used to measure snow depth. Signal-tonoise ratio (SNR) data collected by GPS inst uments exhibit peaks and troughs as coherent direct and reflected signals go ...

This paper investigates a tightly-coupled Global Position System (GPS)/Ultra-Wideband (UWB)/Inertial Navigation System (INS) cooperative positioning scheme using a Robust Kalman Filter (RKF) supported by V2I communication. The scheme proposes a method that uses range measurements of UWB units transmitted among the terminals as augmentation inputs of the observations. The UWB range inputs are us...

Signal de-noising is one of the classical problems in the field of signal processing. As a new signal processing tools, wavelet analysis, which has excellent noise performance, has caused growing concern and attention. The wavelet threshold de-noising has been researched systematacially, and the wavelet de-noising method is used on the GPS signal, which has achieved very good results.

Abstract We examine the sensitivity of Global Positioning System (GPS) to non-tidal loading for a set continental Eurasia permanent stations. utilized daily vertical displacements available from Nevada Geodetic Laboratory (NGL) at stations located least 100 km away coast. Loading-induced predictions earth’s crust are provided by Earth-System-Modeling Group GFZ (ESMGFZ). demonstrate that hydrolo...

Research has demonstrated that receiver clock modeling can reduce the correlation coefficients among the parameters of receiver clock bias, station height and zenith tropospheric delay. This paper introduces the receiver clock modeling to GPS/GLONASS combined precise point positioning (PPP), aiming to better separate the receiver clock bias and station coordinates and therefore improve position...