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  • Nivelación y control de movimientos de los mareógrafos hidrográficos del Port de Barcelona

     Lopez Bravo, Rogelio; Tapia Gomez, Ana Maria; Martinez Benjamin, Juan Jose; Gili Ripoll, Jose Antonio
    Date: 2013
    Report

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    Geodetic infrastructure in the Ibiza and Barcelona harbours for sea level monitoring  Open access

     Martinez Benjamin, Juan Jose; Gili Ripoll, Jose Antonio; Lopez Bravo, Rogelio; Tapia Gomez, Ana Maria; Pérez Gómez, Begoña; Gracia Gomez, Carlos; Pros Llavador, Francesc; Palau Teixidó, Vicenç
    American Geophysical Union Fall Meeting
    p. 1
    Presentation's date: 2013-12
    Presentation of work at congresses

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    The presentation is directed to the description of the actual situation and relevant information of the geodetic infrastructure of Ibiza and Barcelona sites for sea level determination and contribution to regional sea level rise. Time series are being analysed for mean sea level variations www.puertos.es. .In the framework of a Spanish Space Project, the instrumentation of sea level measurements has been improved by providing the Barcelona site with a radar tide gauge Datamar 2000C from Geonica s.l. near an acoustic tide gauge. Puertos del Estado installed in 2007 a MIROS radar tide gauge and the Barcelona Harbour Authority a GPS referente station in the roof of the new Control Tower situated in the Energy Pier. The radar sensor is over the water surface, on a L-shaped structure which elevates it a few meters above the quay shelf. 1-min data are transmitted to the ENAGAS Control Center by cable and then sent each 1 min to Puertos del Estado by e-mail. There is a GPS station Leica Geosystems GRX1200 GG Pro and antenna 1202. Precision levelling has been made several times in the last two years because the tower is founded in reclaimed land. The measured settlement rate is about 1cm/year that may be could mask the values registered by the tide gauge. A description of the actual infrastructure at Ibiza harbour at Marina de Botafoch, is presented and its applications to sea level monitoring and altimeter calibration in support of the main CGPS at Ibiza harbour. It is described the geometrical precision levelling made in June 2013 between the radar tide gauge and the GPS station. In particular, the CGPS located at Ibiza harbour is essential for its application to the marine campaign Baleares 2013, near Ibiza island. The main objective is to determine the altimeter bias for Jason-2, about 9:09 UTC September 15, 2013, and Saral/AltiKa, about 05:30 UTC September 16, UTC. These activities has been received funding of the Ministerio de Ciencia e Innovacion under Spanish National Project CGL2009-13435/CLI.

    The presentation is directed to the description of the actual situation and relevant information of the geodetic infrastructure of Ibiza and Barcelona sites for sea level determination and contribution to regional sea level rise. Time series are being analysed for mean sea level variations www.puertos.es. .In the framework of a Spanish Space Project, the instrumentation of sea level measurements has been improved by providing the Barcelona site with a radar tide gauge Datamar 2000C from Geonica s.l. near an acoustic tide gauge. Puertos del Estado installed in 2007 a MIROS radar tide gauge and the Barcelona Harbour Authority a GPS referente station in the roof of the new Control Tower situated in the Energy Pier. The radar sensor is over the water surface, on a L-shaped structure which elevates it a few meters above the quay shelf. 1-min data are transmitted to the ENAGAS Control Center by cable and then sent each 1 min to Puertos del Estado by e-mail. There is a GPS station Leica Geosystems GRX1200 GG Pro and antenna 1202. Precision levelling has been made several times in the last two years because the tower is founded in reclaimed land. The measured settlement rate is about 1cm/year that may be could mask the values registered by the tide gauge. A description of the actual infrastructure at Ibiza harbour at Marina de Botafoch, is presented and its applications to sea level monitoring and altimeter calibration in support of the main CGPS at Ibiza harbour. It is described the geometrical precision levelling made in June 2013 between the radar tide gauge and the GPS station. In particular, the CGPS located at Ibiza harbour is essential for its application to the marine campaign Baleares 2013, near Ibiza island. The main objective is to determine the altimeter bias for Jason-2, about 9:09 UTC September 15, 2013, and Saral/AltiKa, about 05:30 UTC September 16, UTC. These activities has been received funding of the Ministerio de Ciencia e Innovacion under Spanish National Project CGL2009-13435/CLI.

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    Control del asentamiento de los diques este y sur del Puerto de Barcelona mediante datos InSAR  Open access

     Martinez Benjamin, Juan Jose; Pros Llavador, Francesc; González López, Silvia
    Congreso de la Asociación Española de Teledetección
    p. 560-563
    Presentation's date: 2013-10
    Presentation of work at congresses

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    En este artículo se estudia la viabilidad del uso de InSAR en el control del asentamiento de los diques de reciente construcción en el Puerto de Barcelona. El análisis se realizó a partir de datos obtenidos mediante Persistent Scatterer Interferometry (PSI) validándose con datos obtenidos mediante GPS. El uso de satélites de alta resolución permite obtener una gran densidad de puntos en estas infraestructuras de carácter lineal, facilitando un análisis muy detallado del movimiento que se produce. Aunque su uso en el control de infraestructuras está limitado por la disponibilidad de las imágenes, no permitiendo su uso como sistema de control único.

    [CASTELLÀ] En este artículo se estudia la viabilidad del uso de InSAR en el control del asentamiento de los diques de reciente construcción en el Puerto de Barcelona. El análisis se realizó a partir de datos obtenidos mediante Persistent Scatterer Interferometry (PSI) validándose con datos obtenidos mediante GPS. El uso de satélites de alta resolución permite obtener una gran densidad de puntos en estas infraestructuras de carácter lineal, facilitando un análisis muy detallado del movimiento que se produce. Aunque su uso en el control de infraestructuras está limitado por la disponibilidad de las imágenes, no permitiendo su uso como sistema de control único. [ANGLÈS] In this paper we study the feasibility of using InSAR in monitoring the settlement of newly built dikes in the Port of Barcelona. The analysis was performed using data obtained by Persistent Scatterer Interferometry (PSI), GPS measures was used to validate PSI data. The use of high-resolution satellites allows a high density of points in these linear nature infrastructures, providing a very detailed analysis of the movement that occurs. Although its use in the control infrastructure is limited by the availability of the images, not allowing use as a unique control system.

  • Sea level monitoring in Ibiza and Begur cape

     Martinez Benjamin, Juan Jose; Termens Perarnau, Assumpció
    International Association of Geodesy Scientific Assembly
    p. 532
    Presentation's date: 2013-09
    Presentation of work at congresses

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    The determination of global and regional mean sea level variations with accuracies better than 1 mm/yr is a critical problem, the resolution of which is central to the current debate on climate change and its impact on the environment. Highly accurate time series from different techniques are needed. Measuring the sea surface height with in-situ tide gauges and GPS data provides an efficient way to control the long term stability of the radar altimeters and other applications as the vertical land motion and studies of sea level change. The necessity to validate and calibrate the satellite altimeter, due to increasing needs in accuracy and long term integrity, implies establishing calibration sites with enhanced ground based methods for sea level monitoring. A description of the actual and future operational geodetic infrastructure and instrumentation at Ibiza and Begur Cape is presented as their applications to sea level monitoring and altimeter calibration. The main objective is the integration of spaceborne, airborne and in-situ data for the establishment of altimeter calibration areas in the western Mediterranean in the framework of Global Change.

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    SAR measurements of coastal features in the NW Mediterranean  Open access

     Redondo Apraiz, Jose Manuel; Martinez Benjamin, Juan Jose; Diez Rilova, Margarita; Lopez Gonzalez-Nieto, Pilar
    European Geosciences Union General Assembly
    p. 161-162
    Presentation's date: 2013-04-12
    Presentation of work at congresses

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    The Synthetic Aperture Radar (SAR) is a useful tool to study both marine water dynamics and its pollution, this is relevant near the coastline, where river pollution may be also important. Oil spills and natural slicks are detected with SAR to reveal river and vessel pollution as well as the complex eddy and current interaction in the ocean surface near the coastline. In the framework of the ESA and European Union contracts, more than 1000 SAR images of the North-west Mediterranean Sea area taken between December 1996 and December 2008 are presented using self-similar traces that may be used to parametrize mixing at both limits of the Rossby Deformation Radius scale. Results show the ability to identify different SAR signatures and at the same time provide calibrations for the different local configurations of vortices, spirals, oil spills and tensioactive slicks that eventually allow predicting the behaviour of different tracers and pollutants in the NW Mediterranean Sea.

  • Deformation monitoring of the Control Tower, Port of Barcelona (Spain)

     Tapia Gomez, Ana Maria; Lopez Bravo, Rogelio; Gili Ripoll, Jose Antonio; Martinez Benjamin, Juan Jose; Pros Llavador, Francesc; Palau, Vicenç
    Joint International Symposium on Deformation Monitoring
    p. 1-5
    Presentation's date: 2013-09
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    The Control Tower of the Port of Barcelona is situated in the North dike of the so-called Energy Pier in the Barcelona harbor (Spain). This tower has different kind of antennas for navigation monitoring and a GNSS permanent station. As the tower is founded in reclaimed land, and because its metallic structure, the 50 m building is subjected to diverse movements, including periodic fluctuations due to temperature changes. In this contribution the 2009, 2011 and 2012 monitoring campaigns are described, specially an `ad hoc¿ solution to reach the roof of the tower by means of a vertical steel calibrated tape. In the works, GPS positioning and clinometers have been used as well. The measured settlement rate in the NE of the Energy Pier area is about 1 cm/year. Horizontal movements in the top of the Tower are in the range of +-4 mm. These are not extreme figures, but they mask the values registered by a tide gauge nearby or by the GNSS Permanent Station in the Tower roof. So, it is mandatory to carefully monitor these Stations periodically, especially in elevation.

  • Implementation of marine altimeter calibration campaign in the area of Ibiza island

     Martinez Benjamin, Juan Jose; Lopez Bravo, Rogelio; Pérez Gómez, Begoña; Gili Ripoll, Jose Antonio; Tapia Gomez, Ana Maria; Gonzalez Gonzalez, Juan Carlos; Sanz Conde, M. Mercedes; Gracia Gomez, Carlos
    European Space Agency Living Planet Symposium
    p. 1-4
    Presentation's date: 2013
    Presentation of work at congresses

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    The presentation is directed mainly to the description of the actual situation of the Ibiza site in preparation for a new altimeter calibration marine campaign of Jason-2 and Sara/AltiKa satellites to be made in september 2013. A description of the two geometric levelling campaigns made in June and September 2013 is included

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    Baleares 2013 Calibration Campaign for Jason-2 and Saral/AltiKa  Open access

     Martinez Benjamin, Juan Jose; Biancale, Richard; Martin Davila, José; Gárate Pasquín, Jorge; Pérez Gómez, Begoña; Gili Ripoll, Jose Antonio; Lopez Bravo, Rogelio; Tapia Gomez, Ana Maria; Gracia Gomez, Carlos; Frappart, Frédéric; Roussel, Nicolas
    Ocean Surface Topography Science Team Meeting
    p. 1
    Presentation's date: 2013-10
    Presentation of work at congresses

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    A Baleares calibration campaign in Spanish-French cooperation is being prepared for mid September 2013 for the altimeters of Jason-2 and Saral/AltiKa in the Ibiza island area. A similar Spanish/French experience with Jason-1 was made in June 2003 in this geographical area under IBIZA 2003 campaign. In this local/regional campaign focusing in bias, we foresee to calibrate the altimeter of Jason-2 and Saral satellites by means of GPS buoys. 4 buoys will be used near a node from Jason-2 (September 15 about 9:38 in ascending track) and Saral (September 15 about 7:30 in ascending track) satellites to get the slope of the sea in along track and cross track directions, what is necessary to interpolate the exact nadir point of the satellite. It will be used Argos floating transmitters from CLS to be tied to the buoys with a long rope. We have thought over different configurations. The crossover point between Jason-2 and Saral North of Ibiza (around 40 nm) and West of Mallorca island seems to be optimal in order to have a comparable layout of buoys at the same place for both satellites, of couse at one day interval. This would allow moreover cross calibration between Jason2 and Saral. The GPS receivers will be at 1Hz. It will be used the CGPS at Ibiza harbour from Puertos del Estado. A description of the actual geodetic infrastructure of Ibiza site will be presented. This campaign Baleares 2013 is founded from the Ministerio de Ciencia e Innovacion of Spain under National Project I+D+i ref:CGL2009-13435/CLI.

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    Monitoring sea level by tide gauges and GPS at Barcelona and Estartit harbours  Open access

     Martinez Benjamin, Juan Jose; Gili Ripoll, Jose Antonio; Lopez Bravo, Rogelio; Bosch, Ernest; Perez, Begoña; Pros, Francesc
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2012-04-25
    Presentation of work at congresses

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    The presentation is directed to the description of the actual situation of the geodetic infrastructure of Barcelona and l’Estartit sites for sea level determination and contribution to regional sea level rise

  • Monitoring sea level by tide gauges and GPS at Estartit and Barcelona sites for altimeter calibration campaigns

     Lopez Bravo, Rogelio; Martinez Benjamin, Juan Jose; Gili Ripoll, Jose Antonio; Tapia Gomez, Ana Maria; Bosch Llopart, Ernest; Pérez Gómez, Begoña; Pros Llavador, Francesc
    Years of Progess in Radar Altimetry
    p. 1-4
    Presentation's date: 2012-09
    Presentation of work at congresses

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  • Implementation of Barcelona, l'Estartit and Ibiza sites for altimeter calibration marine campaigns

     Martinez Benjamin, Juan Jose; Gili Ripoll, Jose Antonio; Lopez Bravo, Rogelio; Tapia Gomez, Ana Maria; Perez, Begoña; Bosch, Ernest; Pros, Francesc
    American Geophysical Union Fall Meeting
    p. 1
    Presentation's date: 2012-12-06
    Presentation of work at congresses

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    A marine campaign to compute the sea surface data along the Spanish Mediterranean coastline and Balearic Islands is being prepared for 2013. Jason-2 (period ~10 days) and Saral/AltiKa (period of 35 days and expected launch in 2012) altimetric data and on-board GPS data will be used. Many GPS Buoy sessions along the ship route will be performed.Sea height estimates (instantaneous and mean sea levels) will be compared. Recently some geodetic improvements has been made in specific coastal spanish sites in the NW Mediterranean Sea for monitoring sea level. The goal is to maintain and improve the quality of the observation of the sea level change in the three sites. The information is coming from Puertos del Estado www.puertos.es L¿Estartit tide gauge has been co-located with geodetic techniques (GPS measurements of XU, Utilitary Network, and XdA, Levelling Network,) and it is tied to the SPGIC (Integrated Geodetic Positioning System of Catalonia) project of the Cartographic Institute of Catalunya (ICC). In the past three calibration campaigns for Topex/Poseidon and Jason-1 in March 1999, August 2000 and July 2002 near Cape of Begur. At Barcelona harbour there is one MIROS radar tide gauge belonging to Puertos del Estado (Spanish Harbours).The radar sensor is over the water surface, on a L-shaped structure which elevates it a few meters above the quay shelf. 1-min data are transmitted to the ENAGAS Control Center by cable and then sent each 1 min to Puertos del Estado by e-mail. The information includes wave forescast (mean period, significant wave height, sea level, etc.This sensor also measures agitation and sends wave parameters each 20 min. There is a GPS station Leica Geosystems GRX1200 GG Pro and antenna 1202. Bathymetric campaigns inside the harbour have been made. At Ibiza site new measurements and levelling between the GPS reference station and a Radar MIROS, both from Puertos del Estado, has been made recently. A calibration campaign for Jason-1 was made in June 2003 in the Ibiza area, main calibration site. The presentation is directed to the description of the actual situation of the geodetic infrastructure of Barcelona, l¿Estartit sites for sea level determination and complementing Ibiza site for a new altimeter calibration campaign of Jason-2 and Saral/AltiKa satellites to be made in 2013. Specifications of the new marine calibration campaign will be presented

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    Some suggestions about satellite and airbone gravimetry geiod determination in the western Mediterranean Sea  Open access

     Martinez Benjamin, Juan Jose; Termens Perarnau, Assumpció
    GRACE Science Team Meeting
    p. 1
    Presentation's date: 2012-09
    Presentation of work at congresses

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    This paper will cover a variety of topics. First, it will overview the concepts of GRACE and GOCE satellite missions. Second, it will summarise some results of the assessment of the recent Earth global gravity field models, focusing on the study of the differences between satellite altimetry and tide gauge observations. Third, it will describe the computation and evaluation of a new geoid model for the Western Mediterranean area in the near future. All three topics will be set in the framework of the existing data and how airborne gravimetry can contribute. With the increased interest in coastal zone mapping because of threats like sea level change, airborne gravimetry can bridge the gap between land and satellite-altimeter-derived gravity data. As such, a proposal will be made to collect airborne gravimetry in key Mediterranean coastal zones.

    This paper will cover a variety of topics. First, it will overview the concepts of GRACE and GOCE satellite missions. Second, it will summarise some results of the assessment of the recent Earth global gravity field models, focusing on the study of the differences between satellite altimetry and tide gauge observations. Third, it will describe the computation and evaluation of a new geoid model for the Western Mediterranean area in the near future. All three topics will be set in the framework of the existing data and how airborne gravimetry can contribute. With the increased interest in coastal zone mapping because of threats like sea level change, airborne gravimetry can bridge the gap between land and satellite-altimeter-derived gravity data. As such, a proposal will be made to collect airborne gravimetry in key Mediterranean coastal zones.

  • Nivelación de la estación GPS de la torre de control y del mareógrafo de la Autoridad Portuaria de Barcelona

     Lopez Bravo, Rogelio; Tapia Gomez, Ana Maria; Gili Ripoll, Jose Antonio; Pros Llavador, Francesc; Martinez Benjamin, Juan Jose
    Congreso Iberoamericano de Geomática y Ciencias de la Tierra
    p. 1-12
    Presentation's date: 2012-10-18
    Presentation of work at congresses

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    Comparison of several geoid models over the Western Mediterranean Sea  Open access

     Martinez Benjamin, Juan Jose; Termens Perarnau, Assumpció
    Revista catalana de geografia
    Vol. 16, num. 43, p. 1-7
    Date of publication: 2011-10
    Journal article

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    The Mediterranean Sea is a semi-enclosed true ocean. Recent Mediterranean circulation and sea level studies using various observations and ocean general circulation models show good coherence and agreement. The satellite altimetry and tide gauge observed and model predicted sea level show good coherent with correlation coefficient of 0.6. The barotropic pressure response accounts for about 66% of the Mediterranean sea level rise (1948-2001). The estimated sea level trend (1.54 ± 0.75 mm/yr) using decadal altimetry (1985-2001) after correcting the interannual/decadal signals reconstructed using tide gauge data, agrees well with the long term trend (1948-2001) estimated using tide gauges (1.43 ± 0.09 mm/yr) in the Mediterranean Sea, and is in better agreement than before with the global long-term sea level trend (1.7 - 1.8 mm/yr). Simulation studies indicate that the time-varying mass variations of Mediterranean Sea likely are sensitive to GOCE at the few mEötvös level. One of GOCE's primary high-level data products is the global gravity model with anticipated geoid accuracy of 1 cm RMS and a spatial resolution of 130 km or longer. Actually, the International Centre for Global Earth Models (ICGEM) distributes some GOCE's Global Gravity field Models (GGMs) like GO_CONS_GCF_2_DIR (Bruinsma et al, 2010), GO_CONS_GCF_2_TIM (Pail et al, 2010a), GO_CONS_GCF_2_SPW (Migliaccio et al, 2010), GOCO01S (Pail et al, 2010b). The work focuses on the comparison between these GOCE's GGMs, EGM2008 and EIGEN-51C, with sea gravity anomalies and geoid undulations provided by existing local and regional geoids - like IBERGEO (Sevilla, 2008), IGG (Corchete et al, 2005), etc. - in the Western Mediterranean Sea in order to find the GGM that best fits this area. We also try to estimate how the GOCE geoid data, provided by ESA, works on the Western Mediterranean Sea in order to prepare future geomatic issues.

    The Mediterranean Sea is a semi-enclosed true ocean. Recent Mediterranean circulation and sea level studies using various observations and ocean general circulation models show good coherence and agreement. The satellite altimetry and tide gauge observed and model predicted sea level show good coherent with correlation coefficient of 0.6. The barotropic pressure response accounts for about 66% of the Mediterranean sea level rise (1948-2001). The estimated sea level trend (1.54 ± 0.75 mm/yr) using decadal altimetry (1985-2001) after correcting the interannual/decadal signals reconstructed using tide gauge data, agrees well with the long term trend (1948-2001) estimated using tide gauges (1.43 ± 0.09 mm/yr) in the Mediterranean Sea, and is in better agreement than before with the global long-term sea level trend (1.7 - 1.8 mm/yr). Simulation studies indicate that the time-varying mass variations of Mediterranean Sea likely are sensitive to GOCE at the few mEötvös level. One of GOCE's primary high-level data products is the global gravity model with anticipated geoid accuracy of 1 cm RMS and a spatial resolution of 130 km or longer. Actually, the International Centre for Global Earth Models (ICGEM) distributes some GOCE's Global Gravity field Models (GGMs) like GO_CONS_GCF_2_DIR (Bruinsma et al, 2010), GO_CONS_GCF_2_TIM (Pail et al, 2010a), GO_CONS_GCF_2_SPW (Migliaccio et al, 2010), GOCO01S (Pail et al, 2010b). The work focuses on the comparison between these GOCE's GGMs, EGM2008 and EIGEN-51C, with sea gravity anomalies and geoid undulations provided by existing local and regional geoids - like IBERGEO (Sevilla, 2008), IGG (Corchete et al, 2005), etc. - in the Western Mediterranean Sea in order to find the GGM that best fits this area. We also try to estimate how the GOCE geoid data, provided by ESA, works on the Western Mediterranean Sea in order to prepare future geomatic issues.

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    Implementación CGPS y altimetría en los Puertos de Ibiza, l¿Estartit y Barcelona para monitorización del nivel del mar  Open access

     Martinez Benjamin, Juan Jose; Ruiz, A.; Bosch, Ernest; Martinez I Garcia, Marina; Martinez De Osés, Francisco Javier; Perez, Begoña; Rodríguez Velasco, G.; Pros Llavador, Francesc; Gili Ripoll, Jose Antonio; Tapia Gomez, Ana Maria; Lopez Bravo, Rogelio; Termens Perarnau, Assumpció; Ortiz Castelló, Miquel Angel
    Revista de teledetección
    num. 36, p. 20-25
    Date of publication: 2011-12
    Journal article

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    Dos campañas aéreas con el LIDAR Optech ALTM-3025 del ICC (Instituto Cartogáfico de Cata- luña) fueron realizadas el 16 de Junio de 2007 de día con un Partenavia P-68 y el 12 de Octubre de 2007 de noche con un Cessna Caravan 208B. La validación posible de esta nueva tecnología LIDAR puede ser útil para suministrar medidas en áreas costeras, de unos 15 a 20 km desde la línea de costa, donde la altimetría radar por satélite da problemas severos debido al amplio haz («footprint») que abar- ca zona de tierra. La segunda campaña aerotransportada se realizó coincidiendo con el paso del saté- lite ICESat provisto de un láser altímetro. Se describe la situación actual de las infraestructuras CGPS en Ibiza, l¿Estartit y Barcelona así como sus aplicaciones a la monitorización del nivel del mar y ca- libración altimétrica. El objetivo principal es la integración de datos geodésicos espaciales, aero- transportados e in-situ para establecer áreas de calibración altimétrica en el Mediterráneo Occidental en el marco del estudio del Cambio Global

    Dos campañas aéreas con el LIDAR Optech ALTM-3025 del ICC (Instituto Cartogáfico de Cataluña) fueron realizadas el 16 de Junio de 2007 de día con un Partenavia P-68 y el 12 de Octubre de 2007 de noche con un Cessna Caravan 208B. La validación posible de esta nueva tecnología LIDAR puede ser útil para suministrar medidas en áreas costeras, de unos 15 a 20 km desde la línea de costa, donde la altimetría radar por satélite da problemas severos debido al amplio haz («footprint») que abarca zona de tierra. La segunda campaña aerotransportada se realizó coincidiendo con el paso del satélite ICESat provisto de un láser altímetro. Se describe la situación actual de las infraestructuras CGPS en Ibiza, l’Estartit y Barcelona así como sus aplicaciones a la monitorización del nivel del mar y calibración altimétrica. El objetivo principal es la integración de datos geodésicos espaciales, aerotransportados e in-situ para establecer áreas de calibración altimétrica en el Mediterráneo Occidental en el marco del estudio del Cambio Global. Two airborne calibration campaigns carrying an Optech Lidar ALTM-3025 (ICC) were made on June 16, 2007 with a Partenavia P-68 and October 12, 2007, with a Cessna Caravan 208B flying along two ICESat target tracks including crossover near l’Estartit. The validation of this new technology LIDAR may be useful to fill coastal areas where satellite radar altimeters are not measuring due to the large footprint and the resulting gaps of about 15-30 km within the coastline. The second airborne campaign was made at night at the same time of the ICESat overflying. A description of the actual geodetic CGPS (Continuos GPS) infrastructures at Ibiza, l’Estartit and Barcelona is presented as their applications to sea level monitoring and altimeter calibration. The main objective is the integration of spaceborne, airborne and in-situ data for the establishment of altimeter calibration areas in the western Mediterranean in the framework of Global Change.

  • Coastal altimetry

    DOI: 10.1007/ 978-3-642-12796-0
    Date of publication: 2011
    Book

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    Geodetic infrastructure in the Barcelona and l¿Estartit harbours for sea level monitoring  Open access

     Martinez Benjamin, Juan Jose; Bosch, Ernest; Pérez Gómez, Begoña; Martinez De Osés, Francisco Javier; Gili Ripoll, Jose Antonio; Tapia Gomez, Ana Maria; Gonzalez Gonzalez, Juan Carlos; Sanz Conde, M. Mercedes; Lopez Bravo, Rogelio; Pros Llavador, Francesc
    Ocean Surface Topography Science Team Meeting
    p. 1
    Presentation's date: 2011-10
    Presentation of work at congresses

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    Comparison of several geoid models over the western Mediterranean sea  Open access

     Martinez Benjamin, Juan Jose; Termens Perarnau, Assumpció
    International GOCE User Workshop
    p. 1-5
    Presentation's date: 2011-03-31
    Presentation of work at congresses

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    The Mediterranean Sea is a semi-enclosed true ocean. Recent Mediterranean circulation and sea level studies using various observations and ocean general circulation models show good coherence and agreement.

  • Multiscale analysis of SAR and ASAR river plumes and coastal features

     Redondo Apraiz, Jose Manuel; Sekula, Emil; Martinez Benjamin, Juan Jose
    International Workshop on Science and Applications of SAR Polarimetry and Polarimetric Interferometry
    p. 140-141
    Presentation's date: 2011-01-24
    Presentation of work at congresses

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  • TECNICAS DE TELEDETECCION IN-SITU, ALTIMETRICAS RADAR Y OPTICA EN LAS AREAS DE CALIBRACION LOS PUERTOS DE

     Sanz Conde, M. Mercedes; Tapia Gomez, Ana Maria; Lopez Bravo, Rogelio; Gonzalez Gonzalez, Juan Carlos; Gili Ripoll, Jose Antonio; Martinez De Osés, Francisco Javier; Schutz, Bob; Urban, Timothy; Bosch, Ernest; Martinez Benjamin, Juan Jose
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  • Laser altimeter experiences at Ibiza island, Cape of Begur and Barcelona (Spain)

     Martinez Benjamin, Juan Jose; Schutz, Bob; Urban, Tim; Ortiz Castellón, M. A.
    American Geophysical Union Fall Meeting
    p. 1
    Presentation's date: 2010-12-16
    Presentation of work at congresses

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    Campañas altimétricas de calibración del Topex y Jason-1 en el Mediterráneo Occidental  Open access

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina; Ortiz Castellón, M. A.; Martin Davila, José; Garate, Jorge; Perez, Begoña; Bonnefond, Pascal
    Latin American Remote Sensing Week
    p. 1-11
    Presentation's date: 2010-10-06
    Presentation of work at congresses

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    Se describen las campañas de calibracion altimétrica realizadas en el Mediterráneo Occidental por la Universidad Politécnica de Cataluña con el soporte del Instituto Cartográfico de Cataluña, el Real Instituto y Observatorio de la Armada y por Puertos del Estado principalmente. Se realizaron tres experiencias en el Cabo de Begur para calibracion altimétrica y mapeo del geoide marino realizadas en 1999, 2000 y 2002. Calibración absoluta directa estimando el bias del Alt‐B del Topex fue realizada durante el overflight del satelite usando boyas GPS. Una contribución española a las experiencias de calibración ha sido el diseño de las Boyas y Catamarán GPS teniendo en cuenta diseños previos de la Universidad de Boulder en Colorado y las de Senetosa/Capraia. Una campaña mas fue realizada en Junio de 2003 en el area de la Isla de Ibiza. Se utilizaron cinco estaciones GPS de referencia localizadas en Ibiza, San Antonio y Portinax, y por dos mareógrafos georeferenciados situados en los puertos de Ibiza y San Antonio. Una calibración directa adicional fue realizada el 14 de Junio. Otro objetivo importante era obtener el perfil de la Superficie Media Marina a lo largo de las trazas del T/P o Jason‐1 con boyas/catamarán GPS. Mapear la superficie marina para la calibración altimetrica indirecta tiene la ventaja de permitir la calibración de cualquier radar que cruce el area estudiada pero, en cambio, la desventaja es reduce la precision de la estimación del bias. Se tiene prevista una nueva campaña a realizar en la misma zona aproximadamente siguiendo las trazas de los atélites Jason‐2 y Altika con lanzamiento previsto en 2011 que permitirá obtener datos altimétricos en zonas róximas a la costa. Three Begur Cape experiences on radar altimeter calibration and marine geoid mapping made on 1999, 2000 and 2002 are overviewed. One campaign has also been made in June 2003 at the Ibiza island area. Direct absolute calibration estimating the Topex Alt‐B bias was performed during the satellite overflight by using GPS buoys. The advantage of that method is that neither geoid modelling nor tidal error is needed. Other main objective was to map the profile of the Mean Sea Surface (mss) along the closest T/P and Jason‐1 groundtrack. Mapping the marine surface for indirect altimeter calibration has de advantage of allowing the calibration of any radar sensor that crosses the studedarea but, in turn, the disadvantage is that the method requires ocean tide and geoid knowledge, which reduces the accuracy of the bias estimate by a factor of 2. A technical Spanish contribution to the calibration experience has been the design of GPS buoys and GPS catamaran taking in account the University of Colorado at Boulder and Senetosa/Capraia. For the mapping of the extended calibration areas centered on satellite ground tracks, the catamaran was tracked by the Patrol Deva, from the Spanish Navy. An additional absolute altimeter direct calibration was performed on June 14. Complementary data came from five GPS reference stations deployed at Ibiza , San Antonio and Portinatx, and from vertically‐referenced tide gauges located at Ibiza and San Antonio. We present first results on Jason‐1 altimeter calibration using the marine geoid derived from data collected during the campaign. Moreover, the geodetic activities (e.g., GPS, leveling) has permitted to build a very accurate (few mm) local network linked to the european one,s (ITRF2000).

  • EGEO: Enginyeria Geomàtica

     Gili Ripoll, Jose Antonio; Buill Pozuelo, Felipe; Corral Manuel de Villena, Ignacio; Gonzalez Gonzalez, Juan Carlos; Gonzalez Lopez, Sergio; Lantada Zarzosa, Nieves; Lopez Bravo, Rogelio; Martinez Benjamin, Juan Jose; Nuñez Andres, Maria Amparo; Prades Valls, Albert; Puig Polo, Carolina; Rodriguez Jordana, Juan; Tapia Gomez, Ana Maria
    Jornada R+D+I a l'EPSEB
    p. 1
    Presentation's date: 2010-05-05
    Presentation of work at congresses

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  • Contribution of airborne lidar and spaceborne laser experiences at l'Estartit for sea level studies

     Martinez Benjamin, Juan Jose; Schutz, Bob; Urban, Tim; Ortiz, Miquel Angel; Ruiz, Antoni
    IAG Scientific Assembly
    p. 1
    Presentation's date: 2009-09-02
    Presentation of work at congresses

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  • CGPS implementation at the Ibiza, Estartit and Barcelona harbours for coastal altimetry

     Martinez Benjamin, Juan Jose; Ortiz Castellón, M. A.; Bosch, Ernest; Termens, Assumpció; Martinez I Garcia, Marina; Martinez de osés, Xavier; Perez, Begoña; Pros, Francesc
    Coastal Altimetry Workshop
    p. 1
    Presentation's date: 2009-09-17
    Presentation of work at congresses

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  • Comparison of GPS analysis strategies for high-accuracy vertical land motion

     Kierulf, H P; Plag, H P; Bingley, R M; Teferle, N; Demir, C; Cingoz, A; Yildiz, H; Garate, J; Davila, J M; Silva, C G; Zdunek, R; Jaworski, L; Martinez Benjamin, Juan Jose; Orus Pérez, Raul; Aragon Angel, Maria Angeles
    Physics and chemistry of the Earth
    Vol. 33, num. 3-4, p. 194-204
    Date of publication: 2008-01
    Journal article

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  • Altimeter Calibration and Validation campaigns at Ibiza island and Cape of Begur

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina
    EUROCow-2006. Internacional Calibration Orientation Workshop
    p. 1-7
    Presentation of work at congresses

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  • Tide gauges contribution to altimeter calibration experiences in the western Mediterranean

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina
    UNESCO Workshop, Understanding Sea Level rise and variability
    p. 1
    Presentation of work at congresses

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  • Altimeter calibration and Validationcampaigns at Ibiza island and Cape of Begur

     Martinez Benjamin, Juan Jose
    EUROCow-2006. Internacional Calibration Orientation Workshop
    Presentation's date: 2006-01-25
    Presentation of work at congresses

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  • Experiences on altimeter calibration at Ibiza island

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina
    Symposium on 15 Years of progrss in Radar Altimetry
    p. 1-5
    Presentation of work at congresses

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  • Mediterranean circulation and sea level using satellite altimetry and GRACE

     Martinez Benjamin, Juan Jose; Shum, C.K.; Han, S.C.; Kuo, C.Y.
    Geophysical research abstracts
    Vol. 8, p. 87
    Date of publication: 2006
    Journal article

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    The Mediterranean Sea is a semi-enclosed "true" ocean bordering European nations from the Western Europe to the near- and middle-East and Africa and inhibited by some of the world¿s most ancient civilizations and its tremendous resources could be significantly influenced by global climate change which has considerable impact to the society and human well-beings in the region. Long-term sea level change has been quantified recently using a decadal data record from TOPEX/POSEIDON and ERS-1/ERS-2, and using long-term (several decades to 100 years) tide gauge records. The currently observed sea level change of 1.1-1.4 mm/yr from tide gauges [Tsimplis and Baker, 2000] and 2.2 mm/yr from satellite altimetry (1996-2000) [Cazenave et al., 2002; Fenoglio-Marc, 2002] indicate substantial regional variability (rise of sea level in the Eastern Mediterranean and a drop of sea level in the Western Mediter- ranean), and do not agree with the current estimated global sea level rise of 1.8 mm/yr [Church et al., 2004]. This paper is focused on the potential quantification of the pro- cesses governing Mediterranean circulation and long-term sea level change, includ- ing hydrological fluxes associated with refreshening, heat transport, salinity, oceanic mass variations, precipitation, and evaporation, using satellite altimetry and space- borne gravimetry, and available in situ oceanic measurements.

  • On the optimum traffic allocation in heterogeneous CDMA/TDMA networks

     Martinez Benjamin, Juan Jose; Martinez-Garcia, M; Martin-Davila, J; Garate, J; Talaya, J; Ortiz, M A; Baron, A; Bonnefond, P; Agusti Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol
    IEEE transactions on wireless communications
    Vol. 6, num. 9, p. 3170-3174
    Date of publication: 2006-08
    Journal article

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  • Experiences on altimeter calibration at Ibiza island and Cape of Begur (Spain)

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina
    ESA - SP
    Vol. ESA SP-614, p. 1-5
    Date of publication: 2006-03
    Journal article

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    Experiences on altimeter calibration at Ibiza island and Cape of Begur (Spain)  Open access

     Martinez Benjamin, Juan Jose; Martínez-García, Marina; Ortiz Castelló, Miquel Angel; Talaya, Julia; Baron, Anna; Rodríguez Velasco, G.; Martin Davila, José; Bonnefond, Pascal; Gárete-Martín, Jorge; García, Cristina
    Symposium on 15 Years of Progress in Radar Altimetry
    p. 1-5
    Presentation's date: 2006
    Presentation of work at congresses

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    Three preliminary camp aigns for TOPEX /POSEIDON (T/P) wer e made in March 1999 and July 2000 and for JASON-1 in August 2002, in the NW Mediterran ean Sea at th e Begur Cape area. Dir ect abso lute altimeter calibration , and mapping of the sea surface, w ere made in these camp aigns from dir ect overflights using GPS buoys with a toroidal design performed at the I CC based in the orig inal design of the Univ ersity of Colorado at Boulder and a estimation of the TOPEX A lt- B bias w as made. A Spanish JASON-1 geoid gradien t campaign with Fench support has been made in June 2003 at the Ibiza island in the NW Mediterr anean Sea. Th e main objectiv e has b een to map w ith a new d esign ed, builded and calibrated GPS catamar an, the lo cal geoid gradien t in three ar eas around Ibiza island under the ascending (187) and descending (248) Jason-1ground tracks. The catamaran equ ipped with two GPS antennas to perform continuous sea lev el measur ements was towed by the Patro l Dev a from th e Span ish N avy. Five GPS reference stations were dep loyed on Ibiza island: one in Portinatx, two in San Anton io and two in Ibiza. The marin e geo id has been used to relate the coastal tide gauge data from Ibiza and San An tonio h arbours to off- shore altimetric data. In th e framework of the campaign, the levelling of the Ibiza and San Anton io tide gauges to the r espective GPS mark ers w as p erformed. We present synth esis of the resu lts obtained from Topex/Poseidon and th e first r esults on Jason-1 altimeter calibration using the direct measurements from GPS buoys and the derived marin e geoid. Th e Ibiza results agree relativ ely w ell with resu lts ob tained at Corsica, Harvest and Bass Strait calibration permanen t sites. Moreov er, the geod etic activities (e.g., GPS, levelling) has p ermitted to build a very accurate (few mm) local n etwork link ed to th e European one, w ith a reference frame compatible with th e satellite altimetry missions (ITRF2000). The GPS kinematic data wer e processed using two d ifferen t sof twar es allowing to check th e consistency of the solutions. A perspective of a new Jason-1, in cluding Envisat, Ibiza campaign to be made around 2007 will be pr esen ted. These camp aigns w ere supporte by th e Span ish Ministery of Scien ce and Technology under projects of the N ational Space Program ref : ESP1997-1816-CO4- 03 and ESP2001-4534-PE.

    Three preliminary camp aigns for TOPEX /POSEIDON (T/P) wer e made in March 1999 and July 2000 and for JASON-1 in August 2002, in the NW Mediterran ean Sea at th e Begur Cape area. Dir ect abso lute altimeter calibration , and mapping of the sea surface, w ere made in these camp aigns from dir ect overflights using GPS buoys with a toroidal design performed at the I CC based in the orig inal design of the Univ ersity of Colorado at Boulder and a estimation of the TOPEX A lt- B bias w as made. A Spanish JASON-1 geoid gradien t campaign with Fench support has been made in June 2003 at the Ibiza island in the NW Mediterr anean Sea. Th e main objectiv e has b een to map w ith a new d esign ed, builded and calibrated GPS catamar an, the lo cal geoid gradien t in three ar eas around Ibiza island under the ascending (187) and descending (248) Jason-1ground tracks. The catamaran equ ipped with two GPS antennas to perform continuous sea lev el measur ements was towed by the Patro l Dev a from th e Span ish N avy. Five GPS reference stations were dep loyed on Ibiza island: one in Portinatx, two in San Anton io and two in Ibiza. The marin e geo id has been used to relate the coastal tide gauge data from Ibiza and San An tonio h arbours to off- shore altimetric data. In th e framework of the campaign, the levelling of the Ibiza and San Anton io tide gauges to the r espective GPS mark ers w as p erformed. We present synth esis of the resu lts obtained from Topex/Poseidon and th e first r esults on Jason-1 altimeter calibration using the direct measurements from GPS buoys and the derived marin e geoid. Th e Ibiza results agree relativ ely w ell with resu lts ob tained at Corsica, Harvest and Bass Strait calibration permanen t sites. Moreov er, the geod etic activities (e.g., GPS, levelling) has p ermitted to build a very accurate (few mm) local n etwork link ed to th e European one, w ith a reference frame compatible with th e satellite altimetry missions (ITRF2000). The GPS kinematic data wer e processed using two d ifferen t sof twar es allowing to check th e consistency of the solutions. A perspective of a new Jason-1, in cluding Envisat, Ibiza campaign to be made around 2007 will be pr esen ted. These camp aigns w ere supporte by th e Span ish Ministery of Scien ce and Technology under projects of the N ational Space Program ref : ESP1997-1816-CO4- 03 and ESP2001-4534-PE.

  • Jason-1 and Topex/Poseidon altimeter calibration campaigns in the western Mediterranean

     Martinez Benjamin, Juan Jose; Martinez I Garcia, Marina
    ISPRS Commission I Symposium: From Sensors to Imagery
    p. 1-6
    Presentation of work at congresses

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  • Semi-Annual Report

     Martinez Benjamin, Juan Jose
    Date: 2005-04
    Report

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  • Informe Final Proyecto de Investigacion ESP2001-4534-PE

     Martinez Benjamin, Juan Jose
    Date: 2005-09
    Report

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  • JASON-1 CALVAL experiences in Cape of Begur and Ibiza island

     Martinez Benjamin, Juan Jose; Gonzalez Lopez, Sergio; Nuñez Andres, Maria Amparo; Buill Pozuelo, Felipe; Espino Infantes, Manel; Martinez I Garcia, Marina
    6ª Setmana Geomàtica
    Presentation of work at congresses

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  • Observaciones mediante RADARSAT y ERS de las condiciones medioambientales en el Estrecho de Gibraltar

     Platonov, Alexei; Martinez Benjamin, Juan Jose; Redondo Apraiz, Jose Manuel
    XI Congreso nacional de Teledetección
    p. 223-226
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  • UPC activities inside the ESEAS-RI project: precise GPS data processing and future contribution of l'Estartit CGPS station to altimeter calibration

     Martinez I Garcia, Marina; Martinez Benjamin, Juan Jose; Buill Pozuelo, Felipe; Lantada Zarzosa, Nieves; Nuñez Andres, Maria Amparo; Orus Pérez, Raul
    Workshop on Sea Level Variations: Towards an Operational European Sea Level Service
    p. 53
    Presentation of work at congresses

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  • Precise time series determination in the European Sea Level Service (ESEAS) project

     Martinez Benjamin, Juan Jose
    6ª Setmana Geomàtica
    Presentation's date: 2005-02-08
    Presentation of work at congresses

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  • Precise coordinates time series determination in the ESEAS project

     Orús Pérez, Raul; Aragon Angel, Maria Angeles; Martinez Benjamin, Juan Jose
    6ª Setmana Geomàtica
    Presentation of work at congresses

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  • Observaciones mediante RADARSAT y ERS de las condiciones medioambientales en el Estrecho de Gibraltar

     Martinez Benjamin, Juan Jose
    XI Congreso nacional de Teledetección
    Presentation's date: 2005-09-21
    Presentation of work at congresses

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  • Precise time series determination in the European Sea Level (ESEAS) project

     Orús Pérez, Raul; Aragon, A; Martinez Benjamin, Juan Jose
    6ª Setmana Geomàtica
    p. 1-7
    Presentation of work at congresses

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  • The ESEAS-RI CGPS data processing

     Martinez Benjamin, Juan Jose; Orus Pérez, Raul; Aragon Angel, Maria Angeles
    Workshop on Sea Level Variations: Towards an Operational European Sea Level Service
    p. 1-24
    Presentation of work at congresses

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  • Geoid gradient campaign at the Ibiza island

     Martinez Benjamin, Juan Jose
    Geophysical research abstracts
    Vol. 7, p. 1517
    Date of publication: 2005-04
    Journal article

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