DOCSLIB.ORG

Imagesat International NV Correspondence Office 6

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Imagesat International NV Correspondence Office 6 ImageSat International N.V. ImageSat International N.V. Customer Service: Correspondence Office Wilhelminalaan 13 [email protected] 6 Yoni Netanyahu Street Willemstad, Curacao www.imagesatintl.com Or Yehuda 6037604 Israel Tel: +599-9-737-4557 Tel: +972 -3-796-0600 Fax: +599-9-737-4563 Fax: +972-3-516-3430 © ImageSat International, Products and Services Guide, April 2014 ImageSat International N.V. ImageSat International Customer Service: Correspondence Office N.V.Wilhelminalaan 13 [email protected] 6 Yoni Netanyahu Street Willemstad, Curacao www.imagesatintl.com Or Yehuda 6037604 Israel Tel: +599-9-737-4557 Tel: +972-3-796-0600 Fax: +599-9-737-4563 Fax: +972-3-516-3430 Content 1. ABOUT IMAGESAT INTERNATIONAL .......................................................................................... 4 2. THE EROS SATELLITES ................................................................................................................. 5 2.1 GENERAL INFORMATION ............................................................................................................. 5 2.2 ORBITAL INFORMATION .............................................................................................................. 5 2.3 IMAGING PARAMETERS ............................................................................................................... 5 3. DEFINITION OF TERMS USED IN THIS GUIDE .............................................................................. 6 4. PRODUCT GUIDE ........................................................................................................................ 7 4.1 PRODUCTS CHARACTERISTICS ....................................................................................................... 7 4.2 IMAGING TECHNIQUES ................................................................................................................ 8 4.3 PROCESSING LEVELS ................................................................................................................... 9 4.4 VALUE ADDED PRODUCTS ........................................................................................................... 9 4.5 PRODUCT FORMATS ................................................................................................................. 11 4.6 QUALITY ASSURANCE (QA) ....................................................................................................... 11 4.7 SUPPLY OPTIONS ..................................................................................................................... 11 5. SERVICES GUIDE ....................................................................................................................... 12 5.1 IMAGESAT'S ORDER DESK ......................................................................................................... 12 5.2 SERVICE TYPES ........................................................................................................................ 12 5.2.1 New Acquisition .................................................................................................... 12 5.2.2 Archived Images ................................................................................................... 12 5.3 THE WORKFLOW PROCEDURE – FROM REQUEST TO SHIPMENT ........................................................ 13 5.4 SPECIAL IMAGING REQUIREMENTS .............................................................................................. 14 5.5 "LAST CALL" TIMES FOR ORDERING IMAGING ON A SPECIFIC DATE .................................................... 16 5.6 HOW TO SUBMIT AN ORDER ...................................................................................................... 17 5.7 HOW TO PROVIDE THE AOI ....................................................................................................... 17 6. ADVANCED SERVICES ............................................................................................................... 18 PRODUCT ORDER FORM .................................................................................................................. 19 1. ABOUT IMAGESAT INTERNATIONAL ImageSat International N.V. is the owner and operator of the EROS-A and EROS-B very high resolution imaging satellites, whose global coverage provide high-quality imaging services, satisfying national security and management needs with maximum autonomy, secrecy and flexibility. Established in 1997, ImageSat launched EROS-A, its first commercial imaging satellite, into orbit on December 5, 2000. EROS-B, the company’s sub-meter resolution satellite, was launched on April 25, 2006, providing customers with increased revisit time and the benefit of a variety of sensors. Both satellites were accurately placed in their orbit by Russian Start-1 launchers. ImageSat serves a global customer base, comprised of governments and international agencies, which utilize EROS satellite imagery primarily for National Security, Homeland Security and Environmental Security, as well as a wide range of civilian applications. ImageSat International N.V. is a Curacao company with offices in Limassol, Cyprus and Tel Aviv, Israel. The Company's offices in Tel Aviv supervise the construction of the EROS family of satellites and the operation of ImageSat's main Ground Control Station. 4 2. THE EROS SATELLITES 2.1 GENERAL INFORMATION The EROS satellites are lightweight LEO (Low Earth Orbit) satellites with a single electro- optical camera system. EROS satellites acquire high-resolution panchromatic imaging data. EROS satellites are designed to maximize operator flexibility in the creation and adaptation of the daily image acquisition plan. The EROS Satellites’ high maneuverability enables them to be quickly pointed to image customer specified sites on Nadir or at oblique angles of up to 45 degrees. Oblique viewing enables the satellite to view virtually any site on Earth as often as two to three times per week. The orbital period of the EROS satellites, for one revolution around the Earth, is 94-96 minutes. The satellites complete approximately 15 revolutions around the Earth every 24 hours, with two daylight passes per day through the footprint of a typical Ground Receiving Station. 2.2 ORBITAL INFORMATION Info EROS-A EROS-B Orbit Type Sun-Synchronous Orbit Sun-Synchronous Orbit Orbit Height ~550 km 510 ± 40 km Inclination 97.2° 97.2° Nominal Life Expectancy 2000-2015 2006-2022 Local Time of Descending 10:00-11:00 13:00-14:00 2.3 IMAGING PARAMETERS Parameter EROS-A EROS-B Scanning Type Push-broom Push-broom Sun-over-horizon angle: Sun-over-horizon angle: Imaging sunlight conditions more than 10° more than 10° CCD-TDI, Selectable levels: Sensor type CCD 1,4,8,16,32,48,64,96 Spectral band 0.5 to 0.9 0.5 to 0.9 Sampling Depth transmitted 11 bits 10 bits 0.7 m at Nadir from 510 km Ground Sampling Distance for TDI stages 1,4,8 2.1 m at Nadir from 550 km (Resolution) 0.8 m at Nadir from 510 km for all other TDI stages Swath Width 15 km at Nadir from 550 km 7 km at Nadir from 510 km 5 3. DEFINITION OF TERMS USED IN THIS GUIDE □ Imaging/Acquisition: The action of the satellite taking an image of a requested area (One shot of the satellite's camera). □ Scene: The area that is being imaged by the satellite. □ AOI – Area of Interest: An area in which the customer is interested, that will be imaged by the satellite. In order to cover an entire requested AOI, it might be necessary to acquire more than one image. □ Off-Nadir Angle: The off-nadir angle is the angle between the acquired scene's center, the satellite and the nadir (the normal to the Earth from the satellite's center). Each image operation is defined by its starting and ending off-nadir angle, which changes along the imaging process (as the satellite moves in its orbit). As a rule, the smaller the off-nadir angle is, the better the resolution (GSD) is. Satellite Off-Nadir Angle Nadir Earth □ Azimuth: Azimuth is a direction given in degrees, in relative to the north. The direction of the north is considered 0°, and the angle grows in clockwise direction. Some examples: North North North 0° 90° 315° □ Order: A request submitted by the customer to ImageSat, so that ImageSat will take care of imaging the AOI requested by the customer with either EROS-A or EROS-B. 6 4. PRODUCT GUIDE 4.1 PRODUCTS CHARACTERISTICS ImageSat International offers various types of panchromatic images. Each final product is defined by 4 characteristics: Imaging Technique, Processing Level, Value Added Product (Optional) and Format. □ Imaging Technique: The manner in which the satellite payload is used to acquire the imagery data. □ Processing Level: The level of post processing performed on the ground after acquisition and reception of the imagery at the ground station. □ Value Added Product (Optional): After the processing of the image, ImageSat can create an advanced product from it (based on EROS-B images only). This is completely optional, and done only by request of the customer. □ Format: The type of file provided to the customer, as the final product. The following tables summarize the available Imaging Techniques, Processing Levels, Value Added Products and Formats. 7 4.2 IMAGING TECHNIQUES EROS-A: Technique Dimensions Details Basic Image 15 km x 15 2.1 meter ground sampling distance (GSD) at nadir for Km an orbit of 550km. This is the minimal area available for acquisition with EROS-A. Vector Image 15 km x (up Like a Basic Image, but longer, up to ~180 km, to ~180 km) depending on resolution and scanning
Load more

Recommended publications
  • Rafael Space Propulsion
    Rafael Space Propulsion CATALOGUE A B C D E F G Proprietary Notice This document includes data proprietary to Rafael Ltd. and shall not be duplicated, used, or disclosed, in whole or in part, for any purpose without written authorization from Rafael Ltd. Rafael Space Propulsion INTRODUCTION AND OVERVIEW PART A: HERITAGE PART B: SATELLITE PROPULSION SYSTEMS PART C: PROPELLANT TANKS PART D: PROPULSION THRUSTERS Satellites Launchers PART E: PROPULSION SYSTEM VALVES PART F: SPACE PRODUCTION CAPABILITIES PART G: QUALITY MANAGEMENT CATALOGUE – Version 2 | 2019 Heritage PART A Heritage 0 Heritage PART A Rafael Introduction and Overview Rafael Advanced Defense Systems Ltd. designs, develops, manufactures and supplies a wide range of high-tech systems for air, land, sea and space applications. Rafael was established as part of the Ministry of Defense more than 70 years ago and was incorporated in 2002. Currently, 7% of its sales are re-invested in R&D. Rafael’s know-how is embedded in almost every operational Israel Defense Forces (IDF) system; the company has a special relationship with the IDF. Rafael has formed partnerships with companies with leading aerospace and defense companies worldwide to develop applications based on its proprietary technologies. Offset activities and industrial co-operations have been set-up with more than 20 countries world-wide. Over the last decade, international business activities have been steadily expanding across the globe, with Rafael acting as either prime-contractor or subcontractor, capitalizing on its strengths at both system and sub-system levels. Rafael’s highly skilled and dedicated workforce tackles complex projects, from initial development phases, through prototype, production and acceptance tests.
    [Show full text]
  • Chisinau,Moldova,17-21 May 2010
    Chisinau,Moldova,17-21 May 2010 Azerbaijan is an independent country located at the west coast of the Caspian Sea with a population of about 9 million and a territory of 86.6 thousand square kilometers. Azerbaijan is a country of rich mineral resources, including oil and gas and is known as a miraculous country with centuries-old history and ancient culture. As its well known space activities are the priority of as so called super power countries. National Aerospace Agency (NASA) of Azerbaijan was established in 1974. NASA of Azerbaijan is the main organization among the state organizations, which officially deals with aerospace researches in the Republic. NASA of Azerbaijan carries out works in different scientific fields, including Remote Sensing, astrophysics, development of space and air borne apparatus and equipments, designing of scientific devices. NASA of Azerbaijan was established to coordinate and establish scientific and industrial base for conducting fundamental and applied investigations in space researches of the Earth and application of results in the national economy of the country. NASA’s scientific and industrial activities related with the development of theoretical principles and design works and production of the system for gathering, processing, distribution and application of remote sensing data in order to investigate natural resources, land usage, environmental monitoring and forecasting of disaster events. Chisinau,Moldova,17-21 May 2010 InstituteInstitute for for Space Space ResearchResearch Institute Institute
    [Show full text]
  • A Study of Trajectory Models for Satellite Image Triangulation
    265-276_07-096.qxd 2/16/10 3:36 PM Page 265 A Study of Trajectory Models for Satellite Image Triangulation In-seong Jeong and James Bethel Abstract metric camera. In common use, it generally encompasses Many Spaceborne imagery products are provided with both the internal camera geometry as well as any relevant metadata or support data having diverse types, representa- platform motions. For exploitation of a particular image, the tions, frequencies, and conventions. According to the vari- variables and parameters of that model must be assigned ability of metadata, a compatible physical sensor model numerical values, either from calibration, acquisition time approach must be constructed. Among the three components auxiliary sensors, triangulation, or some combination thereof. of the sensor model, i.e., trajectory model, projection equa- Generally, sensor models fall into two categories: models tions, and parameter subset selection, the construction of the based on the explicit physical characteristics of the system, position and attitude trajectory is closely linked with the and replacement models with generic, polynomial form availability and type of support data. In this paper, we show (RPCs), whose numerical values are obtained by means of a how trajectory models can be implemented based on support physical model. For the purposes of this paper, we will data from six satellite image types: QuickBird, Hyperion, exclude from consideration any polynomial based models SPOT-3, ASTER, PRISM, and EROS-A. Triangulation for each (rubber sheet warping) for which numerical parameters are image is implemented to investigate the feasibility and assigned without reference to a physical model. A physi- suitability of the different trajectory models.
    [Show full text]
  • Maximizing the Utility of Satellite Remote Sensing for the Management of Global Challenges
    UN-GGIM Exchange Forum Maximizing the Utility of Satellite Remote Sensing for the Management of Global Challenges Paulo Bezerra Managing Director MDA Geospatial Services Inc. paulo@mdacorporation . com RESTRICTION ON USE, PUBLICATION OR DISCLOSURE OF PROPRIETARY INFORMATION This document contains information proprietary to MacDonald, Dettwiler and Associates Ltd., to its subsidiaries, or to a third party to which MacDonald, Dettwiler and Associates Ltd. may have a legal obligation to protect such information from unauthorized disclosure, use or duplication. Any disclosure, use or duplication of this document or of any of the information contained herein for other thanUse, the duplication,specific pur orpose disclosure for which of this it wasdocument disclosed or any is ofexpressly the information prohibited, contained except herein as MacDonald, is subject to theDettwiler restrictions and Assoon thciatese title page Ltd. ofmay this agr document.ee to in writing. 1 MDA Geospatial Services Inc. (GSI) Providing Essential Geospatial Products and Services to a global base of customers. SATELLITE DATA DISTRIBUTION DERIVED INFORMATION SERVICES Copyright © MDA ISI GeoCover Regional Mosaic. Generated Top Image - Copyright © 2002 DigitialGlobe from LANDSAT™ data. Bottom Image - RADARSAT-1 Data © CSA (()2001). Received by the Canada Centre for Remote Sensing. Processed and distributed by MDA Geospatial Services Inc. Use, duplication, or disclosure of this document or any of the information contained herein is subject to the restrictions on the title page of this document. MDA GSI - Satellite Data Distribution Worldwide distributor of radar and optical satellite data RADARSAT-2 GeoEye WorldView RapidEye USA Canada Brazil Chile RADARSAT-2 Data and Products © MACDONALD DETTWILER AND Copyright © 2011 GeoEye ASSOCIATES LTD.
    [Show full text]
  • Satellite Remote Sensing and GIS Applications in Agricultural Meteorology
    Satellite Remote Sensing and GIS Applications in Agricultural Meteorology Proceedings of the Training Workshop 7-11 July, 2003, Dehra Dun, India Editors M.V.K. Sivakumar P.S. Roy K. Harmsen S.K. Saha Sponsors World Meteorological Organization (WMO) India Meteorological Department (IMD) Centre for Space Science and Technology Education in Asia and the Pacific (CSSTEAP) Indian Institute of Remote Sensing (IIRS) National Remote Sensing Agency (NRSA) and Space Application Centre (SAC) AGM-8 WMO/TD No. 1182 World Meteorological Organisation 7bis, Avenue de la Paix 1211 Geneva 2 Switzerland 2004 Published by World Meteorological Organisation 7bis, Avenue de la Paix 1211 Geneva 2, Switzerland World Meteorological Organisation All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written consent of the copyright owner. Typesetting and Printing : M/s Bishen Singh Mahendra Pal Singh 23-A New Connaught Place, P.O. Box 137, Dehra Dun -248001 (Uttaranchal), INDIA Ph.: 91-135-2715748 Fax- 91-135-2715107 E.mail: [email protected] Website: http://www.bishensinghbooks.com FOREWORD CONTENTS Satellite Remote Sensing and GIS Applications in Agricultural .... 1 Meteorology and WMO Satellite Activities – M.V.K. Sivakumar and Donald E. Hinsman Principles of Remote Sensing ......... 23 Shefali Aggarwal Earth Resource Satellites ......... 39 – Shefali Aggarwal Meteorological Satellites ......... 67 – C.M. Kishtawal Digital Image Processing ......... 81 – Minakshi Kumar Fundamentals of Geographical Information System ......... 103 – P.L.N. Raju Fundamentals of GPS ......... 121 – P.L.N. Raju Spatial Data Analysis ........
    [Show full text]
  • Global Forest Monitoring from Earth Observation
    16 Future Perspectives (Way Forward) Alan Belward and Frédéric Achard Joint Research Centre of the European Commission Matthew C. Hansen University of Maryland Olivier Arino European Space Agency CONTENTS 16.1 Introduction ..............................................................................................299 16.2 Future Earth Observation Technology ................................................. 301 16.3 Perspectives ..............................................................................................302 About the Contributors ......................................................................................303 References .............................................................................................................304 16.1 Introduction Satellites in polar orbits, like Landsat, image the entire planet’s surface every day or every couple of weeks, depending on the swath of the satellite overpass; images with detailed spatial measurements (1–30 m) are usually only available once or twice a month—for example Landsat 5 and 7 (image every 16 days at 30 m resolution)—while coarser resolution imagery (e.g., the MODIS sensor on Terra at 250 m or the SPOT satellites’ Vegetation sensor at 1 km) are provided nearly daily. Because the information is captured digitally, computers can be used to process, store, analyze, and distribute the data in a systematic manner. And because the same sensor on the same platform is gathering images for all points on the planet’s surface, these measurements are globally consistent
    [Show full text]
  • Remote Sensing Satellites
    Online Journal of Space Communication Volume 2 Issue 3 Remote Sensing of Earth via Satellite Article 5 (Winter 2003) January 2003 Introduction to Remote Sensing: Remote Sensing Satellites Hugh Bloemer Dale Quattrochi Follow this and additional works at: https://ohioopen.library.ohio.edu/spacejournal Part of the Astrodynamics Commons, Navigation, Guidance, Control and Dynamics Commons, Space Vehicles Commons, Systems and Communications Commons, and the Systems Engineering and Multidisciplinary Design Optimization Commons Recommended Citation Bloemer, Hugh and Quattrochi, Dale (2003) "Introduction to Remote Sensing: Remote Sensing Satellites," Online Journal of Space Communication: Vol. 2 : Iss. 3 , Article 5. Available at: https://ohioopen.library.ohio.edu/spacejournal/vol2/iss3/5 This Articles is brought to you for free and open access by the OHIO Open Library Journals at OHIO Open Library. It has been accepted for inclusion in Online Journal of Space Communication by an authorized editor of OHIO Open Library. For more information, please contact [email protected]. Bloemer and Quattrochi: Introduction to Remote Sensing: Remote Sensing Satellites EROS A & B EROS (Earth Remote Observation System) A1 was launched in December 2000 as the first constellation of eight high-resolution imaging satellites to be launched between year 2001 and 2005. EROS satellites are high performance, low cost, light, and agile and have been designed for low earth orbit (LEO). The satellites are owned and operated by ImageSat International. This Cyprus-based company was established in 1997 by a consortium of leading satellite, sensor and information management companies and information producers around the world. In February 2001, a couple of months after EROS A1 was launched, ImageSat decided to forgo the production and launch of its planned EROS A2 satellite.
    [Show full text]
  • Satellite Image, Source for Terrestrial Information, Threat to National Security
    www.myreaders.info Satellite Image, RC Chakraborty, www.myreaders.info Source for Terrestrial Information, Threat to National Security by R. C. Chakraborty Visiting Professor at JIET, Guna. Former Director of DTRL & ISSA (DRDO), [email protected] www.myreaders.wordpress.com December 11, 2007 MANIT TRAINING PROGRAMME on Information Security December 10 -14, 2007 at Maulana Azad National Institute of Technology (MANIT), Bhopal – 462 016 The Maulana Azad National Institute of Technology (MANIT), Bhopal, conducted a short term course on "Information Security", Dec. 10 -14, 2007. The institute invited me to deliver a lecture. I preferred to talk on "Satellite Image - source for terrestrial information, threat to RC Chakraborty, www.myreaders.info national security". I extended my talk around 50 slides, tried to give an over view of Imaging satellites, Globalization of terrestrial information and views express about National security. Highlights of my talk were: ► Remote sensing, Communication, and the Global Positioning satellite Systems; ► Concept of Remote Sensing; ► Satellite Images Of Different Resolution; ► Desired Spatial Resolution; ► Covert Military Line up in 1950s; ► Concept Of Freedom Of International Space; ► The Roots Of Remote Sensing Satellites; ► Land Remote Sensing Act of 1992; ► Popular Commercial Earth Surface Imaging satellites - Landsat , SPOT and Pleiades , IRS and Cartosat , IKONOS , OrbView & GeoEye, EarlyBird, QuickBird, WorldView, EROS; ► Orbits and Imaging characteristics of the satellites; ► Other Commercial Earth Surface Imaging satellites – KOMPSAT, Resurs DK, Cosmo/Skymed, DMCii, ALOS, RazakSat, FormoSAT, THEOS; ► Applications of Very High Resolution Imaging Satellites; ► Commercial Satellite Imagery Companies; ► National Security and International Regulations – United Nations , United States , India; ► Concern about National Security - Views expressed; ► Conclusion.
    [Show full text]
  • Geometric Correction of the Quickbird High Resolution Panchromatic Images
    GEOMETRIC CORRECTION OF THE QUICKBIRD HIGH RESOLUTION PANCHROMATIC IMAGES Aguilar, M. A., Aguilar, F. J., Sánchez, J. A., Carvajal, F. and Agüera, F. Departamento de Ingeniería Rural, Universidad de Almería (Spain). Email: [email protected] ABSTRACT The new very high space resolution satellite images, such as QuickBird and IKONOS, open new possibilities in cartographic applications. This work has as its main aim the assessment of a methodology to achieve the best geometric accuracy in orthorectified imagery products obtained from QuickBird Basic Imagery. Root Mean Square Error (RMSE), mean error or bias and maximum error in 79 independent check points are computed and utilized as accuracy indicators. The ancillary data were generated by high accuracy methods: (1) Check and control points were measured with a differential global positioning system (DGPS) and, (2) a dense digital elevation model (DEM) with grid spacing of 2 m generated from a photogrammetric aerial flight at an approximate scale of 1/5000 (RMSEz<0.32 m) was used for image orthorectification. Two 3D geometric correction methods were used to correct the satellite data (3D rational function refined by the user, and the 3D Toutin physical model). The number of control points by orthorectified imagery (9, 18, 27, 36 and 45 control points) was studied as well. The best results (RMSE1D of between 0.48 m and 0.61 m) were obtained when the dense MDE was used for the image orthorectification by 3D physical model. A larger number of GCPs (more than nine) does not improve the results. 1. INTRODUCTION Since the successful launch in the recent past of very high resolution sensors, especially IKONOS-II with 1 m Ground Sample Distance (GSD) and QuickBird with 0.61 GSD, many researchers have considered them as possible substitutes of the classical aerial images used for cartographic purposes at large scales (Fraser, 2002; Kay et al., 2003; Chmiel et al., 2004; Pecci et al., 2004).
    [Show full text]
  • ODQN 10-3.Indd
    National Aeronautics and Space Administration Orbital Debris Quarterly News Volume 10, Issue 3 July 2006 First Satellite Breakups of 2006 The first significant breakup of a satellite in cm) to be tracked by the U.S. Space Surveillance Earth orbit in nearly a year occurred on 4 May 2006 Network (SSN). Of these, 49 had been officially when a 20-year-old Soviet rocket body fragmented cataloged by mid-June. The accompanying figure Inside... without warning. This was the fifth time since 1988 indicates the orbits of 44 debris, including the main ISS Large Area that a launch vehicle orbital stage of this type ex- remnant of the orbital stage, about one week after Debris Collector perienced a spontaneous explosion after spending the event. many years in a dormant state. A little more than Although the lowest perigees were greater than (LAD-C) Update .........2 a month later, a Russian Proton fourth stage ullage 500 km, some of the debris exhibited significant th STS-114 motor broke-up, the 34 on-orbit fragmentation of decay rates, indicating that their area-to-mass ratios this component type since 1984. were noticeably higher than typical debris. Nine de- Micrometeoroid/ A Tsyklon third stage (International Designa- bris had already reentered by mid-June, and a total Orbital Debris tor 1985-108B, U.S. Satellite Number 16263) had of two dozen or more debris are expected to reenter (MMOD) Post-Flight been used to insert Cosmos 1703 into an orbit of by mid-August. Consequently, the overall effect of Assessment ...............2 635 km by 665 km with an inclination of 82.5°.
    [Show full text]
  • Données Satellitaires Synthèse - Données Satellitaires Description Générale
    Synthèse - données satellitaires Synthèse - données satellitaires Description générale Objectif de la recherche Analyser des données satellitaires pour réaliser une cartographie qui permettra à NAE de connaître l’accessibilité des données, et plus particulièrement la possibilité d’utilisation des données satellitaires pour un projet sur l’analyse visible et IR de flux routiers en très haute resolution et en temps réel ou presqu’en temps reel, et de connaître les possibilités d’utiliser ces données pour d’autres projets. Cette analyse comprend (cf. fichier Excel) : 1. Disponibilité 2. Coût 3. Opérateur 4. Satellite 5. Fréquence 6. Résolution 7. Type de données 8. Contact Synthèse - données satellitaires Résultats Temps de revisite Conclusion № Temps de revisite 1. Le nombre de satellites (bases de données) avec un 70 accès ouvert et accessible sur Internet n’est 60 62 actuellement pas suffisant pour obtenir les fréquences 50 (temps de revisite) souhaitées – chaque 3-5 min ou en 40 temps reel. 30 20 Cause : 21 10 12 10 6 4 3 5 3 3 2 4 6 2 6 2 1 5 6 1 • les satellites qui ont fait partie de l’étude étaient construits pour des 0 missions où la fréquence de repassage de 12 h est déjà considérée t - 0 0,5 h 0,78 h 1 h 1,6 h 4 h 5,3 h 12 h 21,6 h 24 h 26,5 h 33,6 h 48 h 62,4 h 72 h 100 h 120 h 192 h 240 h 384 h comme plus que suffisante. № = nombre des satellites* t = temps d’obtention des données 0 = temps réel n/a = nombre des satellites pour lesquels «t» n’est pas disponible (une recherche plus approfondie est nécessaire) Recommandations 1.
    [Show full text]
  • The Relationship Between Poverty and Eros in Plato's Symposium Lorelle D
    Marquette University e-Publications@Marquette Dissertations (2009 -) Dissertations, Theses, and Professional Projects Love's Lack: The Relationship between Poverty and Eros in Plato's Symposium Lorelle D. Lamascus Marquette University Recommended Citation Lamascus, Lorelle D., "Love's Lack: The Relationship between Poverty and Eros in Plato's Symposium" (2010). Dissertations (2009 -). Paper 71. http://epublications.marquette.edu/dissertations_mu/71 LOVE’S LACK: THE RELATIONSHIP BETWEEN POVERTY AND EROS IN PLATO’S SYMPOSIUM By Lorelle D. Lamascus A Dissertation Submitted to the Faculty of the Graduate School, Marquette University, In partial fulfillment of the Requirements for the Degree of Doctor of Philosophy Department of Philosophy Milwaukee, Wisconsin December 2010 ABSTRACT LOVE’S LACK: THE RELATIONSHIP BETWEEN EROS AND POVERTY IN PLATO’S SYMPOSIUM Lorelle D. Lamascus Marquette University, 2010 This dissertation responds to a long-standing debate among scholars regarding the nature of Platonic Eros and its relation to lack. The more prominent account of Platonic Eros presents the lack of Eros as a deficiency or need experienced by the lover with respect to the object needed, lacked, or desired, so that the nature of Eros is construed as self-interested or acquisitive, subsisting only so long as the lover lacks the beloved object. This dissertation argues that such an interpretation neglects the different senses of lack present in the Symposium and presents an alternative interpretation of Eros based on the Symposium ’s presentation of Eros as the child of Poverty and Resource. Chapter one examines the origin and development of the position that Platonic Eros is acquisitive or egocentric and the influence this has had on subsequent interpretations of Plato’s thought.
    [Show full text]