Compensation of Positioning Errors Caused by Tropospheric Wave Propagation in Wide-Area Multilateration Systems

Wide Area Multilateration report

Mitigating Tropospheric Propagation Delay Errors in Precise Airborne GPS Navigation

The high spatial and temporal variability of the troposphere is well known, as is its effect − through propagation delays − on GPS positioning. This effect can be particularly problematical in airborne kinematic differential positioning where the altitude difference between reference station and aircraft is typically quite large. The use of zenith delay models and mapping functions at ground st...

Multipath Compensation in Acoustic Local Positioning Systems

This work proposes a novel method to estimate the Line-of-Sight Time-of-Flights (LOS-TOFs) in a broadband acoustic local positioning system (ALPS) with strong multipath interference. The proposed method is based on the Matching Pursuit channel estimation algorithm that provides a low complexity approximation to the Maximum Likelihood solution for sparse channels. A multichannel version of this ...

Errors in estimating propagation distances in pulse wave velocity.

Errors in Estimating Propagation Distances in Pulse Wave Velocity To the Editor: Recent correspondence1,2 over the report by Lantelme et al3 exposes a more serious problem with the use of the automated pulse wave velocity (PWV) measuring instrument (Complior®). The aortic PWV reported by Lantelme et al ( 14 m/s) was approximately 50% higher than the aortic PWVs obtained by others for similarly ...

Wave propagation theory in offshore applications

A frequency-wavenumber-domain formulation is presented in this paper for calculation of the Green's functions and wave propagation modes in a stratified fluid body underlain by a layered viscoelastic soil medium. The Green's functions define the solid and fluid displacements and fluid pressures due to uniform disk loads acting in either the soil or fluid media. The solution is in the frequency ...