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LOGICIELS DE MESURE ET DE TRAITEMENT DE DIAGRAMMES DE RAYONNEMENT D'ANTENNES : APPLICATION A LA RECHERCHE DU CENTRE DE PHASE Joël KORSAKISSOK – jkorsa@silicom.fr - Silicom Grand Sud Ouest : 5, Avenue Albert Durand – 31700 BLAGNAC Daniel BELOT – Daniel.belot@cnes.fr - Jean-Marc LOPEZ –jean-marc.lopez@cnes.fr CNES : 18, Avenue Edouard Belin – 31401 TOULOUSE Cedex 9 CONCLUSION Dans le domaine de la métrologie antennes, il est nécessaire de maîtriser plusieurs méthodes pour affiner la précision de mesure: correction de centre de phase, corrections liées aux imperfections de la chaîne de mesure, de la chambre anéchoïque, du moyen de mesure (positionneur, logiciel de mesure à la volée), etc. Fig 7 : Ecran d’affichage des résultats de calcul de centre de phase dans SAMS DA Il importe de quantifier chacune des erreurs induites correspondantes (ou, au minimum de trouver un majorant), voire de mettre en oeuvre des corrections, pour être en mesure de donner une estimation de la précision de mesure réalisée. Fig 8 : 2 e Ecran d’affichage des résultats de calcul de centre de phase et de directivité
BACK Low Phase Noise Optical Links for Reference Frequency Distribution in Satellite Payloads Gianandrea QUADRI, Horacio MARTINEZ-REYES, Benoit BENAZET (1) , Olivier LLOPIS LAAS-CNRS, 7 Avenue du Colonel Roche, 31077 Toulouse, Cedex 04, France (1) Alcatel Space, 26 av. J. F. Champollion, B.P. 1187, 31037 Toulouse, France Abstract — Various circuits dedicated to high spectral purity signal transmission using fiber optics are presented. Three application types are investigated : reference frequency distribution at 10 MHz, IF distribution at 800 MHz and microwave synthesized signals at 3.5 GHz. The reception circuit is an optically synchronized oscillator, which provides a good signal conditioning far from the carrier while maintaining the high input signal quality close to the carrier. I. INTRODUCTION Fiber optics constitutes an attractive alternative to conventional wiring for numerous analog applications. Indeed, in addition to its small size and low mass, the fiber does not interfere with electronic devices and provides an excellent isolation of the transmitted signal. One of the targeted application of our work is the reference frequency signal distribution to various subsystems of a telecommunications satellite. Another application could be remote antenna synchronization and control. However, to meet our system requirements, the fiber optics link should not degrade the signal quality, and particularly its phase noise. To this purpose, the optically synchronized oscillator [1,2] is an efficient approach which naturally filters the signal far from the carrier, thus removing the additional noise due to the optical link. Moreover, an optically controlled oscillator delivers a constant output power, which is an interesting feature for a clock or reference frequency delivering network. Different types of optically synchronized oscillators may be investigated. The simplest one uses a conventional photodiode to detect the amplitude modulated optical signal, and the resulting microwave signal is used in a classical injection lock of a microwave oscillator, or as a reference signal in a PLL. In this case, we speak about an indirect optically synchronized oscillator. Another possibility is to realize the oscillator with a transistor sensitive to the optical power (photo-transistor) and thus to control directly the oscillator amplifying element. In this study, various solutions are investigated for a low phase noise optical link at 10 MHz, 800 MHz and 3.5 GHz. Indirect synchronization has been chosen for the two lower frequencies, and both indirect and direct synchronization have been investigated at 3.5 GHz using two types of active devices : an InP based bipolar phototransistor (photo-HBT) [3], and an InP based HEMT device [4]. The application goal for the 10 MHz link is the reference frequency distribution in a telecommunications satellite. The signal from the ultra stable quartz crystal oscillator should be transmitted with no degradation of its phase noise, and this is a very stringent requirement. The 800 MHz application is also in the field of telecommunications satellites, and corresponds to an intermediate frequency in the satellite. The 3.5 GHz frequency is a first attempt to compare the different approaches for high spectral purity microwave signal distribution. The application is not clearly defined today, but it could be in the field of active antennas. II. PHOTO-OSCILLATOR ; THEORY The indirect optical injection locking can be efficiently described by combining the classical noise modeling of an optical link [5,6] to the theory of injection locked oscillators [7,8]. The only questionable point is probably in the interaction between the two systems : has the photodiode (or its associated amplifier) an effect on the oscillator noise ? But if the two systems are isolated in some way from one to another, this approach should apply. The following equation (from Kurokawa’s theory [8]), is an expression of the output phase noise spectral density of a synchronized oscillator, versus the input signal phase noise Sφ input, the free running oscillator phase noise Sφ free, the locking bandwidth flock and the offset from carrier fm. 2 ⎛ f m ⎞ ⎜ ⎟ ⎜ f ⎟ 1 ⎝ lock ⎠ Sϕ = ⋅ S S sync ϕ + ⋅ 2 input 2 ϕ free ⎛ f m ⎞ ⎛ f m ⎞ 1 + ⎜ ⎟ + ⎜ ⎟ ⎜ f ⎟ 1 ⎜ lock f ⎟ ⎝ ⎠ ⎝ lock ⎠
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SÉANCE D'OUVERTURE / OPENING SESSI
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A l’aube de ce siècle, Airbus s
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Etape 4 : L’avion réel une fois
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C’est, sur l’exemple des essais
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parfois même sous la forme de plat
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oth the system and the manufacturin
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Such an interdependence between tes
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eference books, but it is as fundam
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BACK MANAGEMENT DES ESSAIS SYSTEME
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BACK ESSAIS D’ENSEMBLE LANCEURS C
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Elle ne doit cependant pas être me
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- le plan de mesures est conséquen
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4.2 MAQUETTE DYNAMIQUE ARIANE 5 Dan
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Les points délicats liés à l’o
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Processus Commande Architecture Int
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BACK 1 Introduction AIRBUS AIRCRAFT
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So, different test tools shall be d
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3.4 Architecture of A380 Simulators
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3.6 A380: Models In order to suppor
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GENERAL PRESENTATION OF JUZZLE GENE
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Figure 3 : Graphic User Interface o
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IMPLEMENTATION AND SIMULATION OF A
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REFERENCES [1] Space engineering, R
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Client Compliance Matrix (par rappo
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SESSION 2 : TECHNIQUES ET MOYENS D'
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POSTE INE A380 Les besoins fonction
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BACK Trajectographie temps réel DG
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CONCLUSION La phase d'essais en vol
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RÉSUMÉ: Osiris est une gamme de m
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1. INTRODUCTION Dassault Aviation e
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éduction de durée des essais par
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• JBUILDER • ORACLE Cette modul
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9. CONCLUSION OSIRIS a maintenant g
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TABLE DES MATIERES 1. LE DATA-LINK
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AVIONS appartenant au réseau 25_P_
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• 25_P_2/04 PCM émis par l'avion
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3.2 Le temps différé • En temps
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4. CONCLUSION • Toutes les IHM in
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INTRODUCTION Pour définir des proc
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- Ecarts de position en temps réel
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ANNEXE 1 CONSTITUTION CONSTITUTION
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They however incorporate some eleme
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As technology evolves, the boundary
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shown below together with the AGE c
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BACK ESSAIS SYSTEME SUR LES PROJETS
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3 qui contient le logiciel de vol.
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5 • essais en station « in vivo
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Avis, options et recommandations (5
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BACK Automatic Validation of Flight
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− The second level provides all d
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The operational flexibility of SINU
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• Test duration is reduced : for
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mimics from CCS ones. The objective
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1. Introduction ...................
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2. Présentation Le segment sol Ste
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AUS Station STA TM/TC Station STS T
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Id Nom flux EXP37 Plan de vol Annex
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TTC’2003 Stentor 10/06/2003 QUALI
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TTC’2003 Le Programme Stentor 10/
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TTC’2003 Satellite GEO TM/TC/Rang
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TTC’2003 •Equipes CNES : Qualif
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TTC’2003 •L’organisation mise
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TTC’2003 Les Contraintes de Déve
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TTC’2003 Contient ontient la la m
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TTC’2003 10/06/2003 Qualification
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TTC’2003 10/06/2003 Qualification
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BACK Résumé : Outil de traitement
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1 Principes généraux de l’outil
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Vue f(t) 2.3.1 Vues y=f(t) Ces vues
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BACK THE NEXT GENERATION AIRBORNE D
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3. DC SPECIFICATIONS - SEEING THE W
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For the purposes of this paper it i
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hardware down and led to widely acc
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mechanism. In a system where a late
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0 X Y X' Y' 0 X Y Sampling Cycle X
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- Perform the exchange in a rigorou
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GLOSSARY AFDX Avionics Full DupleX
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The complete message is recorded by
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The L3 switches allow forwarding da
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BACK LOGICIEL JAVA D’ACQUISITION
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ISA ISA Interface utilisateur Objet
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CONCLUSION La première version de
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; ( ( + & 2+5. . & & , & . + & +2(
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( +, & + < 0 9& - & = (( + 1 - + +,
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BACK Telemetry Recording Workstatio
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Figure 1: Real-time pen tip display
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establishing different socket conne
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73 64 63 61 60 48 45 40 35 Level (d
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SESSION 5 : TELEMESURE (SPECTRE - M
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Currently various avenues are explo
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Binary X Binary to RNS and RNS to B
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The index multiplier block will be
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The current implementation consists
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Spécificité de la télémesure AI
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Technique COFDM : La modulation COF
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La réception s’effectue par une
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BACK ETCC'2003 European Test and Te
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ETCC'2003 European Test and Telemet
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SESSION 6 : SYSTEMES DE TELEMESURE
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f f p IF = R b = 4R b ∆f = 0. 7R
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2.3 ADC Fig.5 (a) y (t) and its spe
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2.5 FM demodulation Fig.9 I ‘(nT1
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References 1. Gardner FM. A BPSK/QP
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L/S/C /X/Ku /Ka band Spacelink Syst
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Spacelink System - The solution for
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SPOT Σ ∆ X band feed Data LNA Tr
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défilant. Le cahier des charges d
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TOURELLE HEXAPODE La tourelle hexap
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Ci après, tableau des spécificati
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BACK CRISTAUX PHOTONIQUES ET METAMA
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BACK Systems, Design & Tests Direct
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1. INTRODUCTION Cette communication
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Figure 2-1 Vue générale de la Bas
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3. ETALONNAGE DE LA BASE 3.1 PRINCI
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Par définition, le taux de polaris
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This document is the property of EA
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amplitude (dB) 10 0 -10 -20 -30 -40
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amplitude (dB) 10 0 -10 -20 -30 -40
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V1=K1.GVV.E.{[cos()-.sin()] + 1_vra
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- 21 - Amplitude polarisation verti
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- 25 - Amplitude composante vertica
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3.4 SYNTHESE DES RESULTATS CONCERNA
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4.2 DEFINITION DE L'ANTENNE DE MISE
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5.1.2 Diagrammes de rayonnement 5.1
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5.2 ANTENNE DE REFERENCE BANDE P 5.
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Gain (dBi) 5.2.2.2 Résultats Ils s
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Comme attendu, la coupe xOz présen
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Gain (dBi) 5.3.2 diagramme de rayon
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Gain (dBi) 15 10 5 0 -5 -10 -15 -20
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BACK INTRODUCTION MESURE DE CHAMP P
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MESURE DE CHAMP PAR SYSTEME PORTABL
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MESURE DE CHAMP PAR SYSTEME PORTABL
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Abstract Helicopters are relatively
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Au sol, la station réceptionne le
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BACK Résumé Architecture d’une
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Architecture type lanceur lourd ARI
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Architecture petit lanceur L’arch
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Diagramme de l’UCTM Voies analogi
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SESSION 8 : COMPATIBILITE ELECTROMA
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Page 356 and 357: BACK ETTC 2003. Le rôle de la simu
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Page 380 and 381: PRESENTATIONS POSTER / POSTER PRESE
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Page 386 and 387: CONCLUSION - NOS BESOINS FUTURS AIR
Page 388 and 389: LOGICIELS DE MESURE ET DE TRAITEMEN
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Page 438 and 439: BACK UTILISATION de CAMERAS NUMERIQ
Page 440 and 441: TABLE DES MATIÈRES 1. INTRODUCTION
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2. CONTEXTE DES ESSAIS Le but des e
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3. LES BESOINS ET LES CONTRAINTES 3
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4. CHOIX DE LA CAMERA 4.1 Démarche
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5.1.4 Adaptations Les deux principa
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Tir d'un missile AIR/AIR éjecté T
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6. CONCLUSION Cette évaluation mon
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Capteur Intelligent IEEE 1451.4 Pri
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pC/g Piezo Accelerometer mV/g Piezo
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BACK F. Mailly et Al. ETTC 2003 MIC
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4.2. Sensitivity according to the h
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BACK STUDY OF 3∆t PASSIVE LOCATIN
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∆t 1 ∆t ∆t 2 = t = t M N −1
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For the speed of the reentry vehicl
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BACK TITLE In orbit satellite Gain
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dBm dBm Results obtain with the con
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3. NEW METHOD DEVELOPPED FOR IOT SA
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The following figures present the g
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3.2 Analysis of the contribution Th
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ETSC Annual Activities Gerhard Maye
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BACK Abstract European Telemetry St
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The file structure is also adopted
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BACK The statistical Evaluation Of
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BACK Abstract Vendor Independent Da
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