Search Results - "Pérez, Isaac Ramos"

Demonstration of a Combined Active/Passive L-Band Microwave Remote Sensing Airborne Instrument by Ogut, Mehmet, Misra, Sidharth, Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Williamson, Ross, Chae, Chun Sik, Colliander, Andreas, Yueh, Simon H.

“…The passive and active L-band system (PALS) is an airborne microwave instrument suite that combines a separate radar and radiometer airborne instrument with a…”
Get full text

Correction: Ramos-Pérez, I. et al. Calibration of Correlation Radiometers Using Pseudo-Random Noise Signals. Sensors 2009, 9, 6131-6149 by Ramos-Pérez, Isaac, Bosch-Lluis, Xavi, Camps, Adriano, Rodriguez-Alvarez, Nereida, Marchán-Hernandez, Juan, Valencia-Domènech, Enric, Vernich, Carlos, De la Rosa, Sonia, Pantoja, Sebastián

“…It has come to our attention that in the original version of a paper published in Sensors recently, the names of four co-authors were misspelled with several…”
Get full text

Common Mathematical Framework for Real and Synthetic Aperture by Interferometry Radiometers by Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Camps, Adriano, Rodriguez-Alvarez, Nereida, Valencia, Enric, Hyuk Park

“…This work focuses on the relationship between real and synthetic aperture radiometers giving a general and common mathematical framework for both of them. It…”
Get full text

Correction of the Sea State Impact in the L-Band Brightness Temperature by Means of Delay-Doppler Maps of Global Navigation Satellite Signals Reflected Over the Sea Surface by Marchan-Hernandez, J.F., Rodriguez-Alvarez, N., Camps, A., Bosch-Lluis, X., Ramos-Perez, I., Valencia, E.

“…This paper presents an efficient procedure based on 2-D convolutions to obtain delay-Doppler maps (DDMs) of Global Navigation Satellite Signals reflected…”
Get full text

Calibration of correlation radiometers using pseudo-random noise signals by Pérez, Isaac Ramos, Bosch-Lluis, Xavi, Camps, Adriano, Alvarez, Nereida Rodriguez, Hernandez, Juan Fernando Marchán, Domènech, Enric Valencia, Vernich, Carlos, de la Rosa, Sonia, Pantoja, Sebastián

“…The calibration of correlation radiometers, and particularly aperture synthesis interferometric radiometers, is a critical issue to ensure their performance…”
Get full text

A general analysis of the impact of digitization in microwave correlation radiometers by Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Camps, Adriano, Rodriguez-Alvarez, Nereida, Valencia, Enric, Park, Hyuk

“…This study provides a general framework to analyze the effects on correlation radiometers of a generic quantization scheme and sampling process. It reviews,…”
Get full text

PAU-SA: A Synthetic Aperture Interferometric Radiometer Test Bed for Potential Improvements in Future Missions by Ramos-Perez, Isaac, Camps, Adriano, Bosch-Lluis, Xavi, Rodriguez-Alvarez, Nereida, Valencia-Domènech, Enric, Park, Hyuk, Forte, Giuseppe, Vall-Llosera, Merce

“…The Soil Moisture and Ocean Salinity (SMOS) mission is an Earth Explorer Opportunity mission from the European Space Agency (ESA). Its goal is to produce…”
Get full text

Calibration, Performance, and Imaging Tests of a Fully Digital Synthetic Aperture Interferometer Radiometer by Ramos-Perez, Isaac, Forte, Giuseppe F., Camps, Adriano, Bosch-Lluis, Xavier, Valencia, Enric, Rodriguez-Alvarez, Nereida, Park, Hyuk, Vall-llosera, Mercè

“…This work presents the calibration, characterization, and imaging tests of the Passive Advanced Unit-Synthetic Aperture instrument (PAU-SA). PAU-SA is a fully…”
Get full text

Experimental Evaluation of GNSS-Reflectometry Altimetric Precision Using the P(Y) and C/A Signals by Carreno-Luengo, Hugo, Camps, Adriano, Ramos-Perez, Isaac, Rius, Antonio

“…This work describes a novel dual-band Global Navigation Satellite Systems Reflectometer (GNSS-R) that uses the P(Y) and C/A signals scattered over the sea…”
Get full text

Ocean Surface's Scattering Coefficient Retrieval by Delay-Doppler Map Inversion by Valencia, E., Camps, A., Marchan-Hernandez, J. F., Hyuk Park, Bosch-Lluis, X., Rodriguez-Alvarez, N., Ramos-Perez, I.

“…Global navigation satellite system reflectometry of signals is a promising technique to remotely sense a number of Earth's geophysical parameters, and it has…”
Get full text

Vegetation Water Content Estimation Using GNSS Measurements by Rodriguez-Alvarez, N., Bosch-Lluis, X., Camps, A., Ramos-Perez, I., Valencia, E., Hyuk Park, Vall-llossera, M.

“…Global Navigation Satellite Systems (GNSS) opportunity signals reflected at or near the Earth's surface have already shown their potential to perform…”
Get full text

On the Use of GNSS-R Data to Correct L-Band Brightness Temperatures for Sea-State Effects: Results of the ALBATROSS Field Experiments by Valencia, E., Camps, A., Bosch-Lluis, X., Rodriguez-Alvarez, N., Ramos-Perez, I., Eugenio, F., Marcello, J.

“…Sea surface salinity is a key oceanographic parameter that can be measured by means of L-band microwave radiometry. The measured brightness temperatures over…”
Get full text

Retracking considerations in spaceborne GNSS-R altimetry by Park, Hyuk, Camps, Adriano, Valencia, Enric, Rodriguez-Alvarez, Nereida, Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Carreno-Luengo, Hugo

“…The European Space Agency Passive Reflectometry and Interferometry System In-orbit Demonstrator (IoD) aims to perform mesoscale altimetric observations by…”
Get full text

New Instrument Concepts for Ocean Sensing: Analysis of the PAU-Radiometer by Camps, A., Bosch-Lluis, X., Ramos-Perez, I., Marchan-Hernandez, J.F., Izquierdo, B., Rodriguez-Alvarez, N.

“…Sea surface salinity can be remotely measured by means of L-band microwave radiometry. However, the brightness temperature also depends on the sea surface…”
Get full text

New passive instruments developed for ocean monitoring at the remote sensing lab-universitat politècnica de catalunya by Camps, Adriano, Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Marchán-Hernández, Juan F, Rodríguez, Nereida, Valencia, Enric, Tarongi, Jose M, Aguasca, Albert, Acevo, René

“…Lack of frequent and global observations from space is currently a limiting factor in many Earth Observation (EO) missions. Two potential techniques that have…”
Get full text

PAU/GNSS-R: Implementation, Performance and First Results of a Real-Time Delay-Doppler Map Reflectometer Using Global Navigation Satellite System Signals by Marchan-Hernandez, Juan Fernando, Camps, Adriano, Rodriguez-Alvarez, Nereida, Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Valencia, Enric

“…Signals from Global Navigation Satellite Systems (GNSS) were originally conceived for position and speed determination, but they can be used as signals of…”
Get full text

Description and Performance of an L-Band Radiometer with Digital Beamforming by Bosch-Lluis, Xavier, Ramos-Perez, Isaac, Camps, Adriano, Rodriguez-Alvarez, Nereida, Valencia, Enric, Marchan-Hernandez, Juan F.

“…This paper presents the description and performance tests of an L-band microwave radiometer with Digital Beamforming (DBF), developed for the Passive Advanced…”
Get full text

Optimum Intercalibration Time in Synthetic Aperture Interferometric Radiometers: Application to SMOS by Ramos-Perez, I., Bosch-Lluis, X., Camps, A., Gonzalez, V., Rodriguez-Alvarez, N., Valencia, E., Hyuk Park, Vall llosera, Merce, Forte, G.

“…Interpolation strategies for calibration of the Soil Moisture and Ocean Salinity (SMOS) mission of the European Space Agency are tested and compared…”
Get full text

PAU/RAD: Design and Preliminary Calibration Results of a New L-Band Pseudo-Correlation Radiometer Concept by Bosch-Lluis, Xavier, Camps, Adriano, Ramos-Perez, Isaac, Marchan-Hernandez, Juan Fernando, Rodriguez-Alvarez, Nereida, Valencia, Enric

“…The Passive Advanced Unit (PAU) for ocean monitoring is a new type of instrument that combines in a single receiver and without time multiplexing, a…”
Get full text

Advanced architectures for real-time Delay-Doppler Map GNSS-reflectometers: The GPS reflectometer instrument for PAU (griPAU) by Valencia, E., Camps, A., Marchan-Hernandez, J.F., Bosch-Lluis, X., Rodriguez-Alvarez, N., Ramos-Perez, I.

“…In recent years Global Navigation Satellite System’s signals Reflectometry (GNSS-R) has stood as a potential powerful remote sensing technique to derive…”
Get full text