Exploració per tema "L-band"
Ara es mostren els items 1-20 de 21
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A two-dimensional doppler-radiometer for earth observation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-07-31)
Article
Accés obertCompared to synthetic aperture radars (SARs), the angular resolution of microwave radiometers is quite poor. Traditionally, it has been limited by the physical size of the antenna. However, the angular resolution can be ... -
Analisys of noise-injection networks for interferometric-radiometer calibration
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
Article
Accés obertThe spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ... -
Deriving VTEC maps from SMOS radiometric data
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
Comunicació de congrés
Accés obertIn this work, a new methodology is proposed in order to derive vertical total electron content (VTEC) maps from the radiometric measurements of the Soil Moisture and Ocean Salinity (SMOS) mission as an alternative approach ... -
Design and validation of a dual-band circular polarization patch antenna and stripline combiner for the FSSCat mission
(2023-07)
Article
Accés obertThe FMPL-2 payload on board the 3Cat-5/A 6 Unit CubeSat, part of the FSSCat CubeSat mission, includes a dual L-Band Microwave Radiometer and a Global Navigation Satellite System Reflectometer, in one instrument, implemented ... -
Empirical results of a surface-level GNSS-R experiment in a wave channel
(2015-06-01)
Article
Accés obertThe scattering of GNSS signals over a water surface is studied when the receiver is at a low height, as in GNSS-R coastal altimetry. The precise determination of the local sea level and wave state from the coast will provide ... -
FSSCat: The Federated Satellite Systems 3Cat Mission: Demonstrating the capabilities of CubeSats to monitor essential climate variables of the water cycle
(Institute of Electrical and Electronics Engineers (IEEE), 2022-12)
Article
Accés obertThe Federated Satellite Systems/ 3 Cat-5 (FSSCat) mission was the winner of the European Space Agency (ESA) Sentinel Small Satellite (S 3 ) Challenge and overall winner of the 2017 Copernicus Masters competition. It consisted ... -
Global evaluation of SMAP/Sentinel-1 soil moisture products
(Multidisciplinary Digital Publishing Institute (MDPI), 2022-09-16)
Article
Accés obertMAP/Sentinel-1 soil moisture is the latest SMAP (Soil Moisture Active Passive) product derived from synergistic utilization of the radiometry observations of SMAP and radar backscattering data of Sentinel-1. This product ... -
Impact of incidence angle diversity on SMOS and sentinel-1 soil moisture retrievals at coarse and fine scales
(Institute of Electrical and Electronics Engineers (IEEE), 2022-01-01)
Article
Accés obertIncidence angle diversity of space-borne radiometer and radar systems operating at low microwave frequencies needs to be taken into consideration to accurately estimate soil moisture (SM) across spatial scales. In this ... -
In-orbit validation of the FMPL-2 dual microwave payload onboard the Fsscat Mission
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés restringit per política de l'editorialThe Flexible Microwave Payload -2 is the microwave remote sensing payload of the FSSCat mission. The instrument is the outcome of years of work of the Universitat Politécnica de Catalunya Passive Remote Sensing Laboratory, ... -
In-orbit validation of the fmpl-2 instrument—the gnss-r and l-band microwave radiometer payload of the fsscat mission
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-01)
Article
Accés obertThe Flexible Microwave Payload-2 is the GNSS-R and L-band Microwave Radiometer Payload on board 3Cat-5/A, one of the two 6-unit CubeSats of the FSSCat mission, which were successfully launched on 3 September 2020 on Vega ... -
Inter-comparison of SMOS and aquarius brightness temperatures at L-band over selected targets
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Comunicació de congrés
Accés restringit per política de l'editorialThe spectral window at L-band (1.400 - 1.427 GHz) is reserved for passive microwave remote sensing. This band is well-suited to retrieve soil moisture and ocean salinity due to emissivity of soil and seawater decreases ... -
Ocean monitoring using GNSS-R techniques and microwave radiometry: The pau instrument concept
(SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2010-03-10)
Article
Accés obert -
Pocketqube L-Band RFI detection payload
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertIn the last decades, the number of wireless devices has notably increased, and improper RF filtering has resulted in an increase in Radio Frequency Interference (RFI). At L-band this is due to a plethora of reasons: from ... -
Retrieving Sea Surface Salinity With Multi-Angular L-band Brightness Temperatures: Improvement By Spatio-Temporal Averaging.
(AMER GEOPHYSICAL UNION, 2005-03-31)
Article
Accés obertThe Soil Moisture and Ocean Salinity (SMOS) mission was selected in May 1999 by the European Space Agency to provide global and frequent soil moisture and sea surface salinity maps. SMOS' single payload is Microwave Imaging ... -
RF interference analisys in aperture synthesis interferometric radiometers: Application to L-band MIRAS instrument
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-03-31)
Article
Accés obertCurrent spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ... -
Soil moisture estimation synergy using GNSS-R and L-Band microwave radiometry data from FSSCat/FMPL-2
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-05)
Article
Accés obertThe Federated Satellite System mission (FSSCat) was the winner of the 2017 Copernicus Masters Competition and the first Copernicus third-party mission based on CubeSats. One of FSSCat’s objectives is to provide coarse Soil ... -
The correlation of visibility errors and its impact on the radiometric resolution of an aperture synthesis radiometer
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-09-30)
Article
Accés obertThe correlation between the visibility samples' noise of an aperture synthesis radiometer are required for the computation of the recovered temperature noise of a given pixel and of the improvement introduced by baseline ... -
The flexible microwave payload-2: A SDR-based GNSS-reflectometer and L-Band radiometer for CubeSats
(Institute of Electrical and Electronics Engineers (IEEE), 2020-03-23)
Article
Accés obertThis article presents the FMPL-2 on board the FSSCat mission, the 2017 ESA Small Sentinel Satellite Challenge and overall Copernicus Masters Competition winner. FMPL-2 is a passive microwave instrument based on a ... -
Validation of SMOS L2 and L3 soil moisture products over the Duero basin at different spatial scales
(International Society for Photogrammetry and Remote Sensing (ISPRS), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialAn increasing number of permanent soil moisture measurement networks are nowadays providing the means for validating new remotely sensed soil moisture estimates such as those provided by the ESA's Soil Moisture and Ocean ... -
Validation of the SMOS instrument model
(Universitat Politècnica de Catalunya, 2013-07-12)
Projecte Final de Màster Oficial
Accés obert[ANGLÈS] The present work focuses on the investigations conducted in the SMOS instrument modelling. The work of this master thesis is the validation of the instrument model which it is the first step for the investigation ...