1 BRAZILIAN CONTRIBUTION TO THE LISN PROJECT (LOW-LATITUDE IONOSPHERIC SENSOR NETWORK) I. J. Kantor, E.R de Paula, L.F.C. de Rezende, M.T.H. Muella and A.C. Neto INPE, Aeronomy Division, São José dos Campos, São Paulo - Brasil May 2008 Montevideo - Uruguay
2 Over equatorial and low magnetic latitudes the GPS System is affected by the TEC (Total Electron Content) ionospheric scintillation. The TEC causes delay in the GPS signal while the scintillations can cause loss-of-lock and positioning degradation.
3 GLOBAL POSITIONING SYSTEM (GPS) 24 satellites 20,200 km altitude 12 hour period IONOSPHERE L-band L1 = MHz L2 = MHz h ~ 350 km PP PIERCING POINT The GPS system main purpose is to determine the position and velocity of a fixed or mobile object, placed over or near the earth surface, using the signals of 24 satellites on earth's orbit.
4 TEC contour map of CODE's Global Ionospheric Map Geographic latitude and longitude. Day 094, 20:02-23:00 UT The Total Electron Content (TEC) is the amount of free electrons along the path of the electromagnetic wave between each satellite and the receiver TEC = satellite receiver N ds N is the electron density
5 THE EFFECTS OF IONOSPHERIC IRREGULARITIES OVER TEC IONOSPHERIC IRREGULARITIES CAUSE LARGE DEPLETION ON THE TOTAL ELECTRON CONTENT. PLOT FROM TOM DEHEL ( FAA FEDERAL AVIATION ADMINISTRATION USA ), 2002
6 IONOSPHERIC IRREGULARITY GENERATION MECHANISM Rayleigh - Taylor (RT) instability Dungey (1956) Kelley (1989, pag. e 122) Animação gentilmente cedida por C. M. Denardini
7 IONOSPHERIC IRREGULARITY EFFECTS OVER THE GPS SIGNAL SCINTILLATION v Ionosphere WBP (db) Tempo (s)
8 THE EFFECTS ARE IN THE TROPICAL REGION ALL OVER THE WORLD WITH LARGEST INCIDENCE OF SCINTILLATIONS OVER BRAZIL ( LARGE MAGNETIC DECLINATION ).
9 GPS SIGNAL SCINTILLATION WBP(dB) S ,0 0,8 0,6 0,4 0,2 27/12/ PRN 27 São Luís 0, Scintilation Index < I > < I > 4 = 2 S < I > Hora Universal
10 IRREGULARITY EFFECTS OVER SBAS (SPACE BASED AUGMENTATION SYSTEM ) -TESTBED ±40mim
11 IONOSPHERIC IRREGULARITY EFFECTOVER GPS POSITIONING ERRORS Scintillation can cause rapid fluctuations in GPS position fix (Su. Basu et al., GRL, 2005)
12 IONOSPHERIC IRREGULARITY EFFECTS OVER GPS LOSS OF LOCK Another lock loss Long period
13 Summary of GPS Stations in Brazil: GPS receiving stations in Brazil (INPE, IBGE and LISN/NSF, INCRA) SINGLE FREQUENCY MAGNETIC EQUATOR SCINTILLATION (available) SCINTILLATION (TO BE INSTALLED) (available) SCINTILLATION AND ZONAL DRIFT (available) TEC AND SCINTILLATION (NSF) TEC (RBMC-IBGE) (available) VHF RADAR (30 MHz) (available upon request) AFRL ASHTEC (available) ALLEN-OSBORNE (available upon request) TEC (RIBAC-INCRA) LISN/NSF receivers: (C. Valladares) (LISN PROJECT) provide TEC AND S4 Vilhena Porto Velho Rio Branco Parintins Tefé Boa Vista Dourados Santarém Alta Floresta Ilhéus Cuiabá São José dos Campos Ji-Paraná Palmas
14 To study and undestand these ionospheric effects it is necessary a network of ionospheric observing stations, like the LISN project, LISN will provide a nowcast of the state of the South American Low-latitude ionosphere in terms of TEC, TEC depletions, scintillations, bottomside F and E-region densities and a short-term regional forecast of the onset os ESF.
15 LISN Web Page
16 GPS stations in South America LISN, proposed the installation about 50 stations of GPS, distributed in South America, this stations will be administered by Instituto Geofísico del Perú, located at aprox. 12 S, 75 W, will be having a Central Server. The server have this principal function to monitoring, storage and distribution of information to the different users. At the map, green color, show the active stations and the red color the inactive stations.
17 In the brazilian territory 15 LISN receivers were installed. These GPS receivers are providing data that are being recorded at the main server at Boston College and at São Jose dos Campos, Brazil.
18 LISN - Low-latitude Ionospheric Sensor Network Alta Floresta Boa Vista Cuiabá Dourados Ilhéus Ji-Paraná Manaus Parintins S.J.Campos Santa Maria Santarém Tefé Palmas Porto Velho Rio Branco Vilhena
19 LISN - Low-latitude Ionospheric Sensor Network
20 The LISN scintillation data, represented by the S4 scintillation index is going to complement the SCINTEC (Scintillation and TEC Monitoring) System that provides a real time scintillation map over Brazil.
21 SCINTEC PROJECT
22 SCINTEC PROJECT Address of the site:
23 The LISN TEC is going to be used: to study the low latitude electrodynamics and to develop an ionospheric model which will be used: for Scientific Research, for Navigation and Positioning and Geodetic purposes
Ionospheric Impact on GNSS Signals Norbert JAKOWSKI, Christoph MAYER, Volker WILKEN, Mohammed M. HOQUE German Aerospace Center Institute of Communications and Navigation (Norbert.Jakowski@dlr.de, Christoph.Mayer@dlr.de,
INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATION STUDY GROUPS Delayed Contribution Document 9 July 2002 English only Conatel THE SPECTRUM MANAGEMENT AND MONITORING SYSTEMS (SAAGER) IN USE IN VENEZUELA
Permanent GNSS station network and AlpCheck: freight transport monitoring 19 th June 2008 Giorgio Gaber Auditorium Palazzo della Regione Lombardia MILAN Francesco Matonti IREALP Project summary Problems
Safety o f L ife Service Definition Document Ref : EGN-SDD SoL, V1.0 European Commission Directorate-General for Enterprise and Industry Document Change Record Revision Date Summary of Changes 1.0 02/03/2011
Implementing M2M applications via GPRS, EDGE and UMTS Klaus-Dieter Walter, M2M Alliance e.v., Aachen, Germany. E-mail: email@example.com 1 What is M2M? M2M is the abbreviated form of "Machine-to-Machine". The
Forest Ecology and Management 211 (2005) 240 256 www.elsevier.com/locate/foreco Landscape pattern and spatial variability of leaf area index in Eastern Amazonia Luiz Eduardo O.C. Aragão a, *, Yosio Edemir
UNITED NATIONS OFFICE FOR OUTER SPACE AFFAIRS Current and Planned Global and Regional Navigation Satellite Systems and Satellite-based Augmentations Systems International Committee on Global Navigation
CHAPTER 18 TIME TIME IN NAVIGATION 1800. Solar Time The Earth s rotation on its axis causes the Sun and other celestial bodies to appear to move across the sky from east to west each day. If a person located
GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 1 5, doi:10.1002/grl.50786, 2013 Crowdsourcing urban air temperatures from smartphone battery temperatures A. Overeem, 1,2 J. C. R. Robinson, 3 H. Leijnse, 2 G. J.
Weather Radar Monitoring using the Sun Iwan Holleman and Hans Beekhuis Technical Report, KNMI TR-272, 2004 2 Contents 1 Introduction 5 2 Detection of solar interferences 7 2.1 Solar artifacts in reflectivity
DEEP SPACE NETWORK SUPPORT OF SMALL MISSIONS G. K. Noreen* Jet Propulsion Laboratory, California Institute of Technology Pasadena, California Abstract Spacecraft to be used in future missions supported
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Center for Operational Oceanographic Products and Services TIDAL DATUMS AND THEIR APPLICATIONS NOAA Special
LEVEL OF SERVICE STANDARDS FOR BAGGAGE CLAIM FACILITIES AT AIRPORT PASSENGER TERMINALS Viviane Adriano Falcão Graduate Student Aeronautics Institute of Technology Praça Marechal Eduardo Gomes, 50 - Vila
DAMS AND FLOOD CONTROL Carlos E. M. Tucci Institute of Hydraulic Research University Federal of Rio Grande do Sul Porto Alegre RS Brazil Tucci@if.ufrgs.br Abstract: Floods are a natural process in which
Original Article Prevalence of smoking among adults residing in the Federal District of Brasília and in the state capitals of Brazil, 2008* Prevalência do tabagismo em adultos residentes nas capitais dos
Techniques operated for the realization of the reference systems make use of electromagnetic signals received on the surface of the Earth. During their transit of the atmosphere, the signals experience
Project ATMOSPHERE This guide is one of a series produced by Project ATMOSPHERE, an initiative of the American Meteorological Society. Project ATMOSPHERE has created and trained a network of resource agents
TerraSAR-X Image Product Guide Geo-Intelligence Programme Line 1 Introduction TerraSAR-X and TanDEM-X are commercial German Synthetic Aperture Radar (SAR) Earth observation satellites, which were launched
STUDY ON RADAR DIFFERENTIAL INTERFEROMETRY TECHNOLOGY AND IT S APPLICATION TO MANI EARTHQUAKE USING ERS-1/2 SAR DATA: A CASE STUDY IN CHINA Qulin Tan a, *, Siwen i b, in Wang a, Songlin Yang a a School
Analysis of MODIS leaf area index product over soybean areas in Rio Grande do Sul State, Brazil Rodrigo Rizzi 1 Bernardo Friedrich Theodor Rudorff 1 Yosio Edemir Shimabukuro 1 1 Instituto Nacional de Pesquisas
Monitoraggio via Satellite dei Flussi Migratori nell Area del Mediterraneo (Remote Monitoring of Migrants Vessels in the Mediterranean Sea) Francesco Topputo Dinamica Srl Via Rembrandt, 69 20147 Milano
ATMOSPHERIC SCIENCE LETTERS Atmos. Sci. Let. (2011) Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/asl.312 A dense GNSS meteorological network for observing deep convection
Global and Planetary Change 53 (2006) 155 168 www.elsevier.com/locate/gloplacha Sea-level rise at tropical Pacific and Indian Ocean islands John A. Church a,b,, Neil J. White a,b, John R. Hunter b a CSIRO
INTRA-URBAN LAND COVER CLASSIFICATION FROM HIGH-RESOLUTION IMAGES USING THE C4.5 ALGORITHM C. M. D. Pinho a, F. C. Silva a, L. M. C. Fonseca, *, A. M. V. Monteiro a a Image Processing Division, Brazil's