Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere
This work describes the first global scale assessment of a Global Navigation Satellite Systems Reflectometry (GNSS-R) experiment performed on-board the Soil Moisture Active Passive (SMAP) mission for soil moisture and biomass determination. Scattered GPS L2 signals (1227.6 MHz) were collected by the...
Published in: | Remote Sensing |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2017
|
Subjects: | |
Online Access: | https://doi.org/10.3390/rs9040362 |
id |
ftmdpi:oai:mdpi.com:/2072-4292/9/4/362/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2072-4292/9/4/362/ 2023-08-20T04:06:56+02:00 Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere Hugo Carreno-Luengo Stephen Lowe Cinzia Zuffada Stephan Esterhuizen Shadi Oveisgharan agris 2017-04-12 application/pdf https://doi.org/10.3390/rs9040362 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs9040362 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 9; Issue 4; Pages: 362 GNSS-Reflectometry SMAP polarimetry scatterometry soil moisture biomass Text 2017 ftmdpi https://doi.org/10.3390/rs9040362 2023-07-31T21:05:38Z This work describes the first global scale assessment of a Global Navigation Satellite Systems Reflectometry (GNSS-R) experiment performed on-board the Soil Moisture Active Passive (SMAP) mission for soil moisture and biomass determination. Scattered GPS L2 signals (1227.6 MHz) were collected by the SMAP’s dual-polarization (Horizontal H and Vertical V) radar receiver and then processed on-ground using a known replica of the GPS L2C code. The scattering properties over land are evaluated using the Signal-to-Noise Ratio (SNR), the Polarimetric Ratio (PR), and the width of the waveforms’ trailing and leading edges. These parameters show sensitivity to the effects of the Earth’s topography and Above Ground Biomass (ABG) even over Amazonian and Boreal forests. These effects are shown to be an important factor in precise soil moisture and biomass determination. Additionally, it is found that PR shows sensitivity to soil moisture content over different land cover types. In particular, the following values of the PR are found over: (a) tropical forests ~−1.2 dB; (b) boreal forests ~0.8 dB; (c) Greenland ~2.8 dB; and (d) the Sahara Desert ~3.2 dB. Text Greenland MDPI Open Access Publishing Greenland Remote Sensing 9 4 362 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
GNSS-Reflectometry SMAP polarimetry scatterometry soil moisture biomass |
spellingShingle |
GNSS-Reflectometry SMAP polarimetry scatterometry soil moisture biomass Hugo Carreno-Luengo Stephen Lowe Cinzia Zuffada Stephan Esterhuizen Shadi Oveisgharan Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
topic_facet |
GNSS-Reflectometry SMAP polarimetry scatterometry soil moisture biomass |
description |
This work describes the first global scale assessment of a Global Navigation Satellite Systems Reflectometry (GNSS-R) experiment performed on-board the Soil Moisture Active Passive (SMAP) mission for soil moisture and biomass determination. Scattered GPS L2 signals (1227.6 MHz) were collected by the SMAP’s dual-polarization (Horizontal H and Vertical V) radar receiver and then processed on-ground using a known replica of the GPS L2C code. The scattering properties over land are evaluated using the Signal-to-Noise Ratio (SNR), the Polarimetric Ratio (PR), and the width of the waveforms’ trailing and leading edges. These parameters show sensitivity to the effects of the Earth’s topography and Above Ground Biomass (ABG) even over Amazonian and Boreal forests. These effects are shown to be an important factor in precise soil moisture and biomass determination. Additionally, it is found that PR shows sensitivity to soil moisture content over different land cover types. In particular, the following values of the PR are found over: (a) tropical forests ~−1.2 dB; (b) boreal forests ~0.8 dB; (c) Greenland ~2.8 dB; and (d) the Sahara Desert ~3.2 dB. |
format |
Text |
author |
Hugo Carreno-Luengo Stephen Lowe Cinzia Zuffada Stephan Esterhuizen Shadi Oveisgharan |
author_facet |
Hugo Carreno-Luengo Stephen Lowe Cinzia Zuffada Stephan Esterhuizen Shadi Oveisgharan |
author_sort |
Hugo Carreno-Luengo |
title |
Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
title_short |
Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
title_full |
Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
title_fullStr |
Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
title_full_unstemmed |
Spaceborne GNSS-R from the SMAP Mission: First Assessment of Polarimetric Scatterometry over Land and Cryosphere |
title_sort |
spaceborne gnss-r from the smap mission: first assessment of polarimetric scatterometry over land and cryosphere |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2017 |
url |
https://doi.org/10.3390/rs9040362 |
op_coverage |
agris |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Remote Sensing; Volume 9; Issue 4; Pages: 362 |
op_relation |
https://dx.doi.org/10.3390/rs9040362 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs9040362 |
container_title |
Remote Sensing |
container_volume |
9 |
container_issue |
4 |
container_start_page |
362 |
_version_ |
1774718306315403264 |