Browsing by Subject "Altituds -- Mesurament"

Now showing items 1-16 of 16

    • Analysis of spaceborne GNSS-R delay-doppler tracking 

      Hyuk, Park; Pascual Biosca, Daniel; Camps Carmona, Adriano José; Martínez Mindeguía, Francisco; Alonso Arroyo, Alberto; Carreño Luengo, Hugo (2014-05-01)
      Article
      Restricted access - publisher's policy
      For spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R), the delay and Doppler frequency conditions dynamically change, so the compensation of the delay and Doppler errors using tracking is important to ...

    • Attitude and heading system based on EKF total state configuration 

      Munguía Alcalá, Rodrigo Francisco; Grau Saldes, Antoni (IEEE Industrial Electronics Society, 2011)
      Conference report
      Restricted access - publisher's policy
      This paper describes the design, analysis, and experimental results of an Attitude and Heading System based on total state (direct) Extended Kalman Filtering technique. The presented scheme is suitable for implementation ...

    • Combination of fully focused sentinel-6 and interferometric CryoSat-2 to enhance sea ice retrievals 

      Guerra Bernal, Michel Enrique (Universitat Politècnica de Catalunya, 2023-06)
      Master thesis
      Open Access
      Covenantee:   isardSAT
      Radar altimetry has proven to be key in Earth observation when retrieving remote and systematic data for looking at long term trends, this is the case of the cryosphere monitoring. In this context, important missions ...

    • Cross-correlation waveform analysis for conventional and interferometric GNSS-R approaches 

      Martín Alemany, Francisco; Camps Carmona, Adriano José; Hyuk, Park; d'Addio, Salvatore; Martín Neira, Manuel; Pascual Biosca, Daniel (2014-05-01)
      Article
      Restricted access - publisher's policy
      Reflectometry using Global Navigation Satellite System (GNSS-R) signals has become an attractive tool for Earth remote sensing. Back to 1993, it was proposed as an alternative to the conventional spaceborne ocean altimetry ...

    • Disseny i verificació d’una aplicació d’altimetria a partir de baròmetre basada en smartphones 

      Sansa Melsión, Joan (Universitat Politècnica de Catalunya, 2018-06)
      Bachelor thesis
      Open Access
      This project arises from the need to incorporate the measure of altitude and ascent to mobile applications intended to improve the life quality through the monitoring of daily physical activity. To improve the characteristics ...

    • Evolution of PAU/PARIS End-to-end performance simulator (P2EPS) towards GNSS reflectometry, radio occulation and scatterometry simulator (GEROS-SIM) 

      Hyuk, Park; Camps Carmona, Adriano José; Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Alonso Arroyo, Alberto; Martin Alemayny, Francisco (2015)
      Conference lecture
      Restricted access - publisher's policy
      This work shows a state-of-the-art GNSS reflectometry endto-end performance simulator, selected for the ESA’s GNSS rEflectometry, Radio Occultation and Scatterometry onboard International Space Station (GEROS-ISS). For ...

    • First Delay Doppler Maps obtained with the Microwave Interferometric Reflectometer (MIR) 

      Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      The use of Global Navigation Satellite System (GNSS) signals for mesoscale altimetry was first proposed in [1]. Since then, many experiments and a couple of space missions have been carried out to validate the concept in ...

    • GEROS-ISS, a demonstration mission of GNSS remote sensing capabilities to derive geophysical parameters of the earth surfaces: performance evaluation 

      Camps Carmona, Adriano José; Hyuk, Park; Ghavidel, Ali; Rius Casals, Juan Manuel; Sekulic, Ivan (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      The GNSS rEflectometry, Radio Occultation and Scatterometry onboard International Space Station (GEROS-ISS) is an innovative experiment for climate research, proposed in 2011 within a call of the European Space Agency (ESA) ...

    • GNSS-R altimeter based on Doppler multi-looking 

      D'Addio, Salvatore; Martín Neira, Manuel; di Bisceglie, Maurizio; Galdi, Carmela; Martín Alemany, Francisco (2014-05-01)
      Article
      Restricted access - publisher's policy
      Measuring ocean mesoscale variability is one of the main objectives of next generation satellite altimeters. Current radar altimeters make observations only at the nadir sub-satellite ground track, which is not sufficient ...

    • La medición del nivel medio del mar: principios y métodos 

      Pons Valls, Josep Maria (2009-07)
      Article
      Open Access

    • Modeling and analysis of GNSS-R waveforms sample-to-sample correlation 

      Martín Alemany, Francisco; D'Addio, Salvatore; Camps Carmona, Adriano José; Martín Neira, Manuel (2014-05-01)
      Article
      Restricted access - publisher's policy
      The exploitation of global navigation satellite systems Earth-reflected signals to perform ocean mesoscale altimetry from space has been originally proposed at the beginning of the 1990s. This technique is generally defined as

    • Numerical computation of the electromagnetic bias in GNSS-R altimetry 

      Ghavidel, Ali; Schiavulli, Domenico; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016-01-01)
      Article
      Open Access
      In radar altimetry, the electromagnetic (EM) bias is originated by the smaller reflectivity of wave crests than troughs; thus, the average sea surface height is underestimated. Bias uncertainty is currently the largest ...

    • Precision bounds in GNSS-R ocean altimetry 

      Pascual Biosca, Daniel; Camps Carmona, Adriano José; Martínez Mindeguía, Francisco; Hyuk, Park; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl (2014-05-01)
      Article
      Restricted access - publisher's policy
      Global navigation satellite systems (GNSS) signals offer a promising opportunity to perform mesoscale altimetry with worldwide coverage using small satellites. However, unlike the signals used in classical altimeters, the ...

    • Selection of the optimum frequency channels of microwave radiometers for upcoming radar altimetry missions 

      Gual de Torrella Covas, José María (Universitat Politècnica de Catalunya, 2016-09-26)
      Master thesis (pre-Bologna period)
      Open Access
      Nowadays, altimetry radars measurements provide us very important data related to weather, climate etc. A very importan field of of study is the surface altimetry, where an small change in the oceanic surface could mean ...

    • Simulation and analysis of GNSS-R composite waveforms using GPS and Galileo signals 

      Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl (2014-05-01)
      Article
      Restricted access - publisher's policy
      Nowadays, several global navigation satellite system (GNSS) services coexist at L-band and some more will be available in the near future. These new signals were originally conceived to enhance the location accuracy, but ...

    • The microwave interferometric reflectometer. Part II: Back-end and processor descriptions 

      Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      This paper describes the Microwave Interferometric Reflectometer (MIR) instrument back-end for GNSS reflectometry (GNSS-R) applications. MIR uses the interferometric (iGNSS-R) and conventional (cGNSS-R) techniques for ...