- Written by CTTC
- Category: Uncategorised
- Hits: 11588
Instituto Geográfico Nacional (IGN) is the institution responsible of volcanic monitoring and alert in Spain. The IGN monitoring system has been designed to be able to detect changes in evolution of the data recorded by the surveillance networks (seismic, geodetic, geochemical, geophysical, and thermal networks) and to interpret them in terms of possible changes in the eruptive process, establishing prognosis of future evolution including scenarios of different hazards. IGN has to communicate this information to the volcanic risk managers (Civil Protections), as scientific alerts, reports, and personal communication. This scientific alert triggers the activation of the Civil Protection Emergency Plans.
Deformation is one of the parameters that can reflect a change in the volcanic system, which can potentially lead to an eruption. Products generated by the Volcanic Early Warning System (VEW), described in the following sections, have an important effect on improving the monitoring system of IGN as they provide an excellent spatial coverage of deformation with an updating frequency of six days. VEW aims to generate products of deformation which integrates results coming from different geodetic techniques (InSAR, GPS mainly). These results, together with other geophysical information coming from the monitoring networks, can act as input parameters of volcanic assessment software to hold volcanic hazard and risk management.
The starting point of VEW are the deformation maps generated by InSAR techniques using Sentinel-1 data. The methodology to generate these products is the first part of this WP. In a second stage, those maps are integrated with deformation data coming from IGN monitoring networks. The methodology to generate IGN products and the way they are integrated in the VEW constitute the second and third parts of this WP.
Find here de related deliverbles: WP3 Deliverables
Sentinel-1 processing: Deformation Activity Map & Active Deformation Areas map
The three measured islands, La Palma, Hierro and Tenerife, are covered by a single Sentinel-1 frame. The dataset consisted of 83 Sentinel-1 Wide Swath, covering one year and 8-month period, starting in January 2017 and ending in August 2018.
The S-1 data processing has been done by using and tuning the software tools developed by CTTC in the framework of the European Project Safety ( http://safety.cttc.cat/).
The procedure used in this test site, is based in the direct integration of consecutive interferograms (see Barra et al. 2016). The main goal is to fully exploit the high coherent phase of the 6-day interferograms with two purposes: (i) to obtain a good coverage at regional scale and (ii) to be able to detect relatively fast displacements. With this aims, a new approach has been tuned, based on the split of the interferograms in two components. The phase splitting consists in the application of a space filtering to each interfeogram to discriminate those signals that have a smooth phase changes in space (mainly atmospheric contribution) from those with higher space gradients (ground displacements or topographic errors).
In the image below, are represented the key steps to derive the maps. The input of the procedure is a set of N images, the corresponding N-1 complex-interferograms formed by consecutive image pairs, and a Digital Elevation model.
The main outputs of the procedure are on one hand the deformation time series and the estimated velocities over the selected points (Displacement Activity Map - DAM), on the other hand the low-frequency-component of each interferogram. We refer to the related documents (listed below) for more details about the processing steps and the results.
Based on the DAM, the main Active Deformation Areas have been extracted to generate the ADA map, using the ADAFinder software, developed in the framework of the Safety (http://safety.cttc.cat/) and Mommit (https://www.momit-project.eu/) EU projects (Barra et al. 2017; Navarro et al. 2018).
Integration of U-Geohaz products in the volcano monitoring activities
The main objective is to integrate deformation monitoring from different techniques to have a broader vision of the deformation field in the Volcano Monitoring System and risk management. In this project we have integrate de U-Geohaz products (DIM, DAM and ADA) derived from satellite Differential Interferometry (DInSAR) with GPS data coming from the daily processing of the GPS network that IGN has in Canary Islands. For this integration it is necessary to project GPS date to LOS, in order to be able to compare with InSAR data.
With this aim guidelines, addressed to Civil Protection prevention departments, have been developped for a proper integration, use and interpretation of the products obtained in WP3, as a support to early warning system for volcanic hazards.
- Written by Super User
- Category: Uncategorised
- Hits: 3138
- Who is the processor of your data.
- The purpose for which we gather the data requested.
- What is the legitimisation for their processing.
- The length of time we store the data.
- Who your data are assigned to.
- What your rights are.
Purposes, legitimisation and storage of the data
- Purpose: To provide the means for contacting us and answering your requests for information and also to send you information on our products, services and activities via digital media (Email, SMS, WhatsApp), if you check the acceptance box.
- Legitimisation: The user’s consent when requesting information via our contact form and checking the acceptance box for the sending of information.
- Retention: Once your request has been resolved via our form or answered by email, if no new processing is generated and having accepted receipt of commercial communications until the user requests their de-registration.
SENDING OF EMAILS.
- Purpose: To answer your information requests, deal with your requests and answer any inquiries or doubts.
- Legitimisation: The user’s consent when requesting information via our email address.
- Retention: Once your email request has been answered, if no new processing has been generated.
Obligation to provide your personal data and the consequences for a failure to do so. The supply of personal data requires a minimum age of 14 years, or, if applicable, sufficient legal capacity to enter into a contract. The personal data requested are necessary to manage your requests and/or render the services that can be contracted and therefore any failure to do so signifies we cannot attend to you correctly nor provide the service requested.
Recipients of the data
Your data are confidential and will not be transferred to third parties unless legally required.
Rights in relation to your personal data
Any person may withdraw their consent at any time after granting it for the processing of their data. Under no circumstance does withdrawal of consent affect the execution of the subscription contract or the relations established previously. Likewise, you may also exercise the following rights:
- Request access to your personal data or rectification of same when inaccurate.
- Request their deletion when, amongst other reasons, they are no longer necessary for the purpose for which they were governed.
- Request the limitation of processing in certain circumstances.
- Request opposition to the processing of your data due to your particular situation.
- Request data portability when so provided in law.
- Other rights recognised in applicable law.
Where and how to exercise your Rights: By writing to the party concerned at their postal or electronic address (provided in Data Controller section), indicating the reference “Personal Data”, specifying the right to be exercised and with regard to which personal data. In the event of any dispute with the company with regard to the processing of your data you may lodge a claim with the Data Protection Authority (apdcat.gencat.cat).
This webpage uses only its own and third-party (Google Analytics) technical, personalisation and analysis cookies which under no circumstance process personal data nor capture browsing habits for advertising purposes. As a result, pursuant to article 22 of the Law on Information Society Services, and as analysis cookies are used, we have requested your authorisation to use them and informed you of same, and they will be installed after a reasonable period of time for the user to have time to decide whether or not to authorise them.
Security of your personal data
In order to safeguard the security of your personal data, we inform you that we have adopted all the necessary measures of a technical and organisational nature to ensure the security of your personal data against alteration, loss and non-authorised processing and access.
Updating your data
- Written by Super User
- Category: Uncategorised
- Hits: 3743
This Webpage is the property of: CENTRE TECNOLÒGIC DE TELECOMUNICACIONS DE CATALUNYA (CTTC) CIF: G-62616586 Address: Parc Mediterrani de la Tecnologia (PMT) - Building B4 Av. Carl Friedrich Gauss 7 (formerly, Av. Canal Olímpic SN) 08860 - Castelldefels Barcelona (Spain) Register information: Guia d'Entitats. Departament de Justícia de la Generalitat de Catalunya. Registration number: 1613
This Webpage is governed by law solely applicable in Spain and both national and foreign users of this Website are subject to same.
The USER’s access to our Webpage is free of charge and contingent upon reading and fully and expressly accepting without reservation these GENERAL CONDITIONS OF USE that are in effect at the time of access, which we would ask you to read carefully. When using our portal, its contents or services the USER expressly accepts and submits to the general conditions for the use of same. Should the user not be in agreement with these Conditions of Use, they must refrain from using this portal and operating via same.
We may modify the presentation and configuration of our Webpage, expand or reduce the services and even remove it from the Internet at any time, together with the services and contents provided, unilaterally and without prior notice.
All the content, texts, images and source codes of the web are the property of CTTC or third parties for which the exploitation rights have been acquired and are protected by Intellectual and Industrial Property rights.
The user is solely entitled to make private, not for profit use of same, and requires express authorization to modify, reproduce, exploit or distribute them or exercise any other right belonging to the owner.
CTTC is a registered trademark and the reproduction, imitation, use or insertion of these brands is prohibited without our due authorization.
The addition of links to our portal confers no right over same. Moreover, the mere addition of a link to our webpage affords no right to describe oneself as an associate or partner.
CTTC shall be held harmless from all and any claims with regard to the intellectual property rights over the articles and images published by third parties on its portal. Any total or partial imitation of our portal is strictly prohibited.
CONDITIONS OF ACCESS AND USE
Access to our Webpage is free of charge and no prior subscription or registration is required.
The user must access our Webpage in good faith, in accordance with public order and these General Conditions of use. Access to our Website is at the sole liability of the user who shall be liable for any damages they may cause to us or to third parties.
Users are expressly prohibited from using and obtaining the services and contents of this webpage using any procedure other than those stipulated in these conditions of use.
The USER may not carry out any action on our portal that may cause an overload of our computer systems or introduce viruses or the installation of robots or software that alters the normal operation of our website or which may damage our computer systems.
Taking into account the impossibility of controlling the information, contents and services contained on third-party websites which are accessible via the links on our webpage, we inform you that CTTC is not liable for any damages of any nature which may arise from the use of these third-party webpages by the user.
CTTC reserves the unilateral right without notice to remove any USER that the organization deems has infringed the conditions governing the use of our webpage. Said USER shall have no right to bring any claim for this type of action. It also reserves the right to exercise the appropriate legal action against those who infringe the general conditions of use, and the USER accepts that failure to file any such action does not constitute a formal waiver of same, which shall remain in effect until expiry of the limitation period of said infringements.
Confidentiality and security are CTTC’s core values and we therefore undertake to ensure the User’s privacy at all times and not to gather any unnecessary information.
By placing this Webpage at the disposal of the user, we wish to offer a quality service by applying the maximum diligence to the provision of same and to the technological means used. However, we shall not be liable for the presence of virus or other elements that may damage the user’s computer system.
CTTC does not warrant that the availability of the service be continuous or uninterrupted due to circumstances originating as a result of Internet network issues, breakdown of IT devices or other unforeseeable circumstances, such that USER shall tolerate these circumstances within reasonable limits and expressly waives any claim against CTTC for any liability for possible failures, errors or use of the service.
The USER accepts full liability for the use of our webpage and is solely liable for any direct or indirect effect on the webpage, including but not limited to any adverse economic, technical and/or judicial result together with the non-fulfillment of the expectations created by our portal, and the user undertakes to hold CTTC harmless from any claims resulting directly or indirectly from said events.
CTTC does not vouch for the accuracy, veracity or currency of the contents of this webpage, either its own or third parties or linkable to other websites and shall be held fully harmless from any liability arising from the use of same.
The USER acknowledges that they have understood all the information relating to the conditions of use of our portal and that they are sufficient to exclude any error from same and therefore expressly accepts them in full. The USER is fully aware that the mere browsing of this webpage and the use of its services implies acceptance of these conditions of use.
All matters relating to our webpage shall be governed by Spanish law. Should any type of discrepancy or dispute arise between the parties as to the interpretation and content of this webpage, all the parties expressly waive any other jurisdiction and submit to the Courts of Barcelona.
VALIDITY OF THE GENERAL CONDITIONS OF ACCESS TO THE WEBSITE
These General Conditions of Use were modified on 18/04/2019. We may modify them at any time: please check the date of issue every time you connect to our Webpage so as to ensure no modification has been made that may affect you.
For any matters relating to the Conditions of Use of our webpage, please contact us using the details indicated above.
- Written by Super User
- Category: Uncategorised
- Hits: 3091
Cookies are short files that are sent to and stored on the hard disk of the user’s computer via its browser when it is connected to a website. Cookies can be used to gather and store the user's data while they are connected to provide the services requested and are not usually conserved (Session Cookies), or to store the user’s data for another type of future service in which case it may be stored for an indefinite period of time (Persistent Cookies). Cookies may be our own or those of a third party. There are various types of cookies:
- Technical cookies which facilitate the user’s browsing session and the use of the different options or services the website offers such as identifying the session, enabling access to certain areas, simplifying orders, purchases, completion of forms, entries, security, providing functionalities (videos, social networks…).
- Personalisation cookies which allow the user to access the services in keeping with their preferences (language, browser, configuration…).
- Analysis cookies which allow anonymous analysis of the website users’ behaviour and to measure the user’s activity and create browsing profiles to improve the websites.
- Advertising cookies help to manage the advertising spaces of the website.
- Personalised advertising cookies which enable management of the advertising spaces on the website, based on the user’s behaviour and browsing habits, to create their profile and customise the advertising shown on the user’s browser.
CTTC uses its own and third-party technical, personalisation and analysis cookies which under no circumstance process personal data but do capture browsing habits for statistical purposes. For this reason, when entering our website, pursuant to article 22 of the Law on Information Society Services we request your consent to use same.
We inform you that you can activate or de-activate these cookies by following the instructions of your Internet browser.
- Chrome: Configuration -> Show advanced options -> Privacy -> content configuration.
- Firefox: Tools -> Options -> Privacy -> History -> Personalised Configuration.
- Internet Explorer: Tools -> Internet Options -> Privacy -> Configuration.
- Safari: Preferences -> Security.
- Opera: Tools -> Preferences -> Edit preferences > Cookies
- Edge: Configuration -> See advanced configuration -> Privacy and services -> Cookies
For more information you can read the Help section of your browser or the support pages: