eprintid: 4100
rev_number: 11
eprint_status: archive
userid: 422
dir: disk0/00/00/41/00
datestamp: 2021-06-28 00:08:12
lastmod: 2021-06-28 00:08:12
status_changed: 2021-06-28 00:08:12
type: conference_item
metadata_visibility: show
creators_name: Ha, Minh Cuong
creators_name: Vu, Phuong Lan
creators_id: cuonghm@vnu.edu.vn
creators_id: vuphuonglan@hus.edu.vn
title: Application of GNSS-Reflectometry to evaluate the ability to detect moisture changes of sandy soils
ispublished: pub
subjects: Aerospace
subjects: at
divisions: sae
abstract: With population growth, water demand is expected to tremendously increase in the next decades. The optimization of water allocation for agriculture requires soil moisture monitoring. Recent studies suggested to take advantage of continuously emitted navigation signals by the Global Navigation Satellite System (GNSS) constellations, to retrieve soil moisture variations. This active remote sensing technique, known as GNSS Reflectometry (GNSS-R), consists in comparing the interference of reflected waves by the ground and those which come directly from satellites. It offers a wide range of applications in Earth sciences and particularly in soil moisture monitoring, this technique has shown their efficiency for soil with high clay content. It namely presents the advantage of sensing a whole surface around a reference GNSS antenna. In this article, we focus on soil moisture monitoring of sandy areas. The study site is a beach volley field, located in the Paul Sabatier University campus in Toulouse, France, the soil contains 100% of sand. We demonstrated that the waves of the GNSS signals penetrate deeply into the soil and reduce the interest of GNSS-R surface moisture measurements. However, it is possible to retrieve a correct estimate of the soil moisture at 0.1m depth and to obtain a very good temporal monitoring with the benefit of a spatial resolution directly correlated to the antenna height.
date_type: published
publisher: Trường Đại học Bách Khoa – ĐHQG-HCM
official_url: https://easychair.org/conferences/profile.cgi?track=260607;a=24818524
full_text_status: public
pres_type: paper
event_title: Hội thảo GIS toàn quốc 2020
event_dates: Tháng 12 năm 2020
event_type: conference
refereed: FALSE
book_title: GIS Conference Proceeding 2020
related_url_url: http://fenr.hcmut.edu.vn/hoi-thao/hoi-thao-gis-toan-quoc-2020-ung-dung-gis-cho-do-thi-thong-minh-huong-toi-phat-trien-ben-vung/n468
related_url_type: org
citation:   Ha, Minh Cuong and Vu, Phuong Lan   Application of GNSS-Reflectometry to evaluate the ability to detect moisture changes of sandy soils.  In: Hội thảo GIS toàn quốc 2020, Tháng 12 năm 2020.     
document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4100/1/gis2020_paper_4.pdf