Spectral Analysis Tool for GPS Multipath Effects

This document provides detailed instructions on utilizing a specialized tool for spectral analysis of GPS multipath effects. The tool enables researchers to perform Fourier-based signal decomposition to identify frequency-domain characteristics of multipath interference in GPS measurements. Through spectral density calculations and periodogram analysis, users can quantify multipath oscillations typically ranging from 2-10 minutes in duration. The implementation involves processing SNR (Signal-to-Noise Ratio) observations from GPS receivers using windowing functions (e.g., Hamming window) to reduce spectral leakage. We demonstrate how to integrate this analytical tool with TEQC (Translation, Editing and Quality Check) software, leveraging TEQC's data preprocessing capabilities for efficient multipath extraction from RINEX files. The workflow includes configuring TEQC's mp1/mp2 output parameters, applying spectral estimation algorithms (such as Welch's method), and visualizing results through power spectral density plots. Step-by-step procedures and configuration examples are provided to facilitate seamless adoption, enabling researchers to enhance GPS data quality assessment through advanced multipath characterization techniques.