Can we measure vegetation water content and vegetation opacity at L-band with a single GPS receiver?
| العنوان: | Can we measure vegetation water content and vegetation opacity at L-band with a single GPS receiver? |
|---|---|
| المؤلفون: | Daniel Pascual, Adriano Camps, Raul Onrubia, Hyuk Park, Jorge Querol, A. Alonso-Arroyo |
| المساهمون: | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai, Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
| المصدر: | Recercat. Dipósit de la Recerca de Catalunya instname IGARSS UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Teledetecció, 010504 meteorology & atmospheric sciences, Opacity, Satellites, education, 0211 other engineering and technologies, 02 engineering and technology, Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica [Àrees temàtiques de la UPC], GPS signals, 01 natural sciences, Receivers, Normalized Difference Vegetation Index, Sistema de posicionament global, Global Positioning System, medicine, Zenith, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Remote sensing, Vegetation mapping, Vegetation, GNSS, business.industry, GNSS-T, Elevation, Attenuation, Indexes, Enhanced vegetation index, Vegetation remote sensing, GNSS (Sistema de navegació), Vegetation opacity, Cartografia de la vegetació, Environmental science, medicine.symptom, business, Vegetation (pathology) |
| الوصف: | This work shows a technique to estimate the vegetation opacity and infer the vegetation water content using a single GPS receiver located under the vegetation layer being analyzed. It is based on the measurement of the received signal power when the GPS satellite is at the zenith, and when the GPS satellite is with an elevation of 30 degrees. Assuming a horizontally stratified vegetation layer, the attenuation on the GPS signal due to vegetation doubles at 30° elevation angle compared to the zenith. This attenuation is directly related to the vegetation opacity. Then, the vegetation opacity is related to the vegetation water content by a linear parameter. Initial results relating the measured GPS signal power to canopy parameters obtained from hemispheric photos are shown. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0519603cb6db556f7ef18227e1055a9c https://hdl.handle.net/2117/102040 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....0519603cb6db556f7ef18227e1055a9c |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |