Pseudolite-augmentedGPSforDeformationMonitoring:AnalysisandExperimentalStudyAbstract:AlthoughGPShasbeenwidelyusedfordeformationmonitoring,manysurveyenvironments,likeindeepopen-pitminesandvalleys,limitthenumberofvisibleGPSsatellites,(PSL),inparticularthemethod/strategytoestimatePSLmultipatheffect,:GPS;pseudolite;deformationmonitoring;precisionpositioning1IntroductionGPShasbeenwidelyusedforprecisionsurveys,.,deformationsurveys,ontrol,settingoutofengineeringstructures,,availability,andreliabilityofGPSsurveys,however,,uracyofGPS-,manysurveyconditions(likeinurbanareas,deepopen-pitmines,valleys),uracyinaparticulardirection,,ground-based“pseudosatellites”,hereaftercalledpseudolite(PSLS),canbeaddedintoaGPSsurveysystemtostrengthenpositioninggeometry,whichisreferredasthePSL-,broadcastingGPS-,however,
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