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Solé, J. G.
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Solé, J. G.
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- PublicationOpen AccessAn example of operation for a partly manned Antarctic geomagnetic observatory and the development of a radio link for data transmission(2009-02)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Torta, J. M.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Marsal, S.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Riddick, J. C.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Vilella, C.; Enginyeria i Arquitectura La Salle, Universitat Ramon Llull, Barcelona, Spain ;Altadill, D.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Blanch, E.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Cid, O.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Curto, J. J.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Gaya-Piqué, L. R.; Equipe de Géomagnétisme, Institut de Physique du Globe de Paris-CNRS, Paris, France ;Mauricio, J.; Enginyeria i Arquitectura La Salle, Universitat Ramon Llull, Barcelona, Spain ;Pijoan, J. L.; Enginyeria i Arquitectura La Salle, Universitat Ramon Llull, Barcelona, Spain ;Solé, J. G.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain ;Ugalde, A.; Observatori de l’Ebre, CSIC - Universitat Ramon Llull, Roquetes, Spain; ; ; ; ; ; ; ; ; ; ; ; ; The experience acquired from more than ten years of operation of an Antarctic geomagnetic observatory is described along with the development of data transmission facilities. The observatory was deployed at the Spanish Antarctic Station in 1996. The main instrument was an Overhauser magnetometer deployed in dual axis Helmholtz coils, a δD/δI configuration. The site is only manned during the summer, with the magnetometer left recording throughout the rest of the year. During the 2007-2008 survey the observatory instrumentation has been upgraded with a DMI suspended triaxial fluxgate magnetometer, new sampling hardware and data logging software. Both sampling and timing are carried out under the control of a PIC based microcontroller and GPS receiver. Data presentation, transmission and archiving are performed under the control of a low power embedded PC. For real time access to the data two options have been provided and rigorously tested during the last 10 years: METEOSAT and GOES Data Collection Systems, and recently, a high frequency (HF) digital radio-link, using ionospheric propagation between Antarctica and Spain, has been developed. This latest transmission system is being continuously upgraded, and it would be possible to extend its application to other remote stations. Measurements have been made during the last four years in order to determine the channel characteristics and its variability, mainly the multipath and Doppler spread and the link availability for a given SNR in the receiver. These measurements are being used to design the physical layer of a radiomodem intended to maximize the link capacity keeping the emitted power low.314 512 - PublicationOpen AccessCorrelation in f0F2 and M(3000) F2 variations in South-West Europe(1996-08)
; ; ; ; ; ;de la Morena, B. A.; Atmospheric Sounding Station, INTA/CEDEA, Mazagòn, Huelva, Spain ;Alberca, L. F.; Ebro Observatory, Roquetes, Tarragona, Spain ;Sole, J. G.; Ebro Observatory, Roquetes, Tarragona, Spain ;Vilaplana, J. M.; Associate Collaborator, Atmospheric Sounding Station, INTA/CEDEA, Mazagon, Huelva, Spain ;Kazimirovsky, E. S.; nstitute of Solar-Terrestrial Physics, Academy of Sciences, Irkutsk, Russia; ; ; ; A statistical analysis of the variations of the hourly daily values of the M(3000)F2 with the corresponding values of critical frequencies f0F2 was provided for two similar ionosondes (Digisonde-256) located in El Arenosillo and Geophysical Observatory Ebro (both in Spain). Data for winter 1993/1994 and summer 1993 are presented. It is shown that for hour-to-hour variations (both seasons) and for day-to-day variations in summer the correlation is poor and contradictory but for the day-to-day variations in winter months the correlation is significantly higher and positive.179 113 - PublicationOpen AccessA new geomagnetic observatory at Livingston Island (South Shetland Islands): Implications for future regional magnetic surveys(1999-04)
; ; ; ; ; ;Torta, J. M.; Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain f) Observatori de l'Ebre, CSIC, Roquetes (Tarragona), Spain ;Gaya-Piqué, L. R.; Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain f) Observatori de l'Ebre, CSIC, Roquetes (Tarragona), Spain ;Sole, J. G.; Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain f) Observatori de l'Ebre, CSIC, Roquetes (Tarragona), Spain ;Bianco, I.; Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain f) Observatori de l'Ebre, CSIC, Roquetes (Tarragona), Spain ;Garcia, A.; Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain f) Observatori de l'Ebre, CSIC, Roquetes (Tarragona), Spain; ; ; ; A pennanent geomagnetic observatory is always the ideal reference station for monitoring geomagnetic activity during airborne, marine or ground magnetic surveying, especially in Antarctica, where logistic difficulties are an important factor even for the deployment of temporary base stations. The utility of the magnetic observatory records for the correct reduction of the survey data is reinforced if both their spatial homogeneity and their particular anomaly biases are assessed. This, combined with data from the magnetic surveys themselves, can yield information on the crustal contribution to the Earth's magnetic field from a remote and poorly understood region. With these objectives in mind, we present a new geomagnetic observatory in the South Shetland Islands, where (because of the complex regional tectonic characteristics) magnetic surveys on one or another structure are conducted from time to time. An evaluation of the observatory representativeness and a look at the crustal magnetic anomaly ambience are also given.279 192