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Brage NMBU
Master thesis . 2014
Data sources: Brage NMBU
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Precise Point Positioning under degraderte skogsforhold

Authors: Jensen, Andreas Saxi;

Precise Point Positioning under degraderte skogsforhold

Abstract

Denne oppgaven tar utgangspunkt i Precise Point Positioning under degraderte skogstettheter. Gjennom beregning av sikt på bakgrunn av elevasjonsvinkler innmålt i feltarbeid, innmåling av posisjonsdata og beregninger gjort med etterprosesseringstjenestene TerraPos og CSRS-PPP (Canadian Spatial Reference system - Precise Point Positioning), indikerer resultatene en trend hvor posisjonsnøyaktigheten og initialiseringstiden forverres og øker i forhold til referansen (målt med RTK), i takt med fortetning av skog for fire graderte punktene A - D. Som punktet med høyest \% fri sikt hadde A en romlig posisjonsnøyaktighet på 1,81cm (beregnet med TerraPos). Initialiseringstiden for A var en romlig nøyaktiget på 7 cm etter 30 min (TerraPos). Som punktet med lavest \% fri sikt hadde D en endelig romlig posisjonsnøyaktighet med 1,5916m (beregnet med TerraPos), med en initialiseringstid på 2 timer med romlig nøyaktighet på 1,699m. Sammenlignet med dagens krav på nøyaktighet og initialisering for skogsanvendelser er kun posisjonsnøyaktigheten for punkt A og B gode nok. Kravet om måling i sanntid ble ikke testet fordi igr-rapid data ikke ble benyttet.

M-GEOM

Country
Norway
Related Organizations
Keywords

GNSS, RTK, GPS, VDP::Technology: 500::Information and communication technology: 550::Geographical information systems: 555, Precise Point Positioning

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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