Behavior of GPS Signal Interruption Probability under Tree Canopies in Different Forest Conditions
| Autor: | Alex Souza Bastos, Hisashi Hasegawa |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Dilution of precision
Canopy Atmospheric Science business.industry Applied Mathematics Contrast (statistics) 010103 numerical & computational mathematics 010501 environmental sciences GPS signals 01 natural sciences Signal Tree (data structure) Geography Global Positioning System Satellite imagery 0101 mathematics Computers in Earth Sciences business 0105 earth and related environmental sciences General Environmental Science Remote sensing |
| Zdroj: | European Journal of Remote Sensing. 46:613-622 |
| ISSN: | 2279-7254 |
| DOI: | 10.5721/eujrs20134636 |
| Popis: | Global Positioning System (GPS) surveys were conducted over one year in four different forest environments in order to observe interactions between signal interruption probability (SIP), canopy opening index, observation period, number of available satellites and positional dilution of precision (PDOP). SIP showed larger correlation to positional errors than canopy opening index or PDOP, both horizontally and vertically, which contrast with some previous studies. An observation period of up to 15 minutes provided acceptable positional accuracy in correlation with SIP. Through indexes like SIP, canopy structure itself and signal behavior can provide a better understanding of accuracy in forestry. |
| Databáze: | OpenAIRE |
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