35th COSPAR Scientific Assembly, Paris, July 18-25, 20041 IVS Products for Precise Global Reference Frames Wolfgang Schlüter Bundesamt für Kartographie.

Slides:

Advertisements

Similar presentations

RED ATLÁNTICA DE ESTACIONES GEODINÁMICAS Y ESPACIALES Jesús Gómez-González Francisco Colomer Instituto Geográfico Nacional Spain.

Advertisements

Dennis D. McCarthy Elements of Prediction. Why are we here? IERS Working Group on Predictions IERS Working Group on Predictions Definitive user requirements.

A comparison of R1 and R4 IVS networks S.B. Lambert, Royal Observatory of Belgium, formerly at NVI, Inc./US Naval Observatory A.-M. Gontier, Paris Observatory.

Processing of VLBI observation in St. Petersburg University Kudryashova Maria Astronomical Institute of Saint Petersburg University.

2-3 November 2009NASA Sea Level Workshop1 The Terrestrial Reference Frame and its Impact on Sea Level Change Studies GPS VLBI John Ries Center for Space.

Existing Infrastructure for International Exchange of Seismic Data Raymond J. Willemann GEM Technology, Washington, D.C. IASPEI:Includes commissions for.

EPN LAC Workshop 2008 Frankfurt Main, Germany, October, 2008 ASI Local Analysis Center Report C. Ferraro, Telespazio/CGS Matera R. Pacione, e-GEOS/CGS.

Wettzell WVR Workshop1 October 9-10, 2006 Use of NWM forecasts for converting T B to delay Arthur Niell MIT Haystack Observatory Mark Leidner AER, Inc.

Measurements Calibration EGU06-A-05466/G7-1TH5P-0488 Atmospheric parameter comparisons at the Tsukuba and Kashima VLBI stations during the CONT05 VLBI.

VieVS User Workshop 14 – 16 September, 2011 Vienna VIE_SCHED Jing SUN.

Laser Ranging Contributions to Earth Rotation Studies Richard S. Gross Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109–8099,

Current plan for e-VLBI demonstrations at iGrid2005 and SC2005 Yasuhiro Koyama *1, Tetsuro Kondo *1, Hiroshi Takeuchi *1, Moritaka Kimura, Masaki Hirabaru.

E-VLBI Development at Haystack Observatory Alan Whitney Chet Ruszczyk Kevin Dudevoir Jason SooHoo MIT Haystack Observatory 24 March 2006 EVN TOG meeting.

E-VLBI Development at Haystack Observatory Alan Whitney Chet Ruszczyk MIT Haystack Observatory 10 Jan 2006 IVS General Meeting Concepion, Chile.

Electronic Transmission of Very- Long Baseline Interferometry Data National Internet2 day, March 18, 2004 David LapsleyAlan Whitney MIT Haystack Observatory,

E-VLBI Development at Haystack Observatory 5 th Annual e-VLBI Workshop Haystack Observatory 20 September 2006 Alan R. Whitney Kevin Dudevoir Chester Ruszczyk.

DORIS - DAYS Toulouse May 2-3, 2000 DORIS Doppler Orbitography and Radiopositioning Integrated by Satellite  Basic system concept  Main missions  Schedules.

2012 DiFX user’s meeting, Sydney, Australia USNO Software Correlator: Status Report Outline USNO/WACO Background USNO Prototype Software Correlator (UPSC)

E-VLBI: Connecting the Global Array of Radio Telescopes through High-Speed Networks Participating U.S. organizations: MIT Haystack Observatory MIT Lincoln.

Developments for real-time software correlation e-VLBI Y. Koyama, T. Kondo, M. Kimura, M. Sekido, M. Hirabaru, and M. Harai Kashima Space Research Center,

NGS GPS ORBIT DETERMINATION Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic.

03/000 New geodetic VLBI dish in WA Australian Government Geoscience Australia.

October 8, session 2REFAG2010 Paris1 Distributed processing systems for large geodetic solutions IAG WG “Comparison and combination of precise.

ILRS WorkshopEastbourne, UK October 3 -7, 2005 Global Geodetic Observing System (GGOS) A project of the IAG.

Space Geodesy (1/3) Geodesy provides a foundation for all Earth observations Space geodesy is the use of precise measurements between space objects (e.g.,

The Future of the VLBA Workshop, Charlottesville, VA Earth Orientation and GPS Outline Geodetic VLBI background Applications of Geodetic VLBI VLBI for.

Geodetic Networks: The Supporting Framework Terrestrial Reference Frame is ‘Critical Infrastructure’ for all Earth science research and applications. Global.

Radio Astronomy Applications Group Kashima Space Research Center National Institute of Information and Communications Technology EGU2005 GI1-1TH5P-0026.

E-VLBI over TransPAC Masaki HirabaruDavid LapsleyYasuhiro KoyamaAlan Whitney Communications Research Laboratory, Japan MIT Haystack Observatory, USA Communications.

GGOS User Requirements and Functional Specifications Richard S. Gross Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA Global.

E-VLBI: Creating a Global Radio Telescope via High-Speed Networks Alan R. Whitney MIT Haystack Observatory SLAC Data Management Workshop 17 March 2004.

Nov 3, 2009 RN - 1 Jet Propulsion Laboratory California Institute of Technology Current Developments for VLBI Data Acquisition Equipment at JPL Robert.

The ICRF, ITRF and VLBA Chopo Ma NASA’s Goddard Spaceflight Center.

VLBI2010: Networks and Observing Strategies Bill Petrachenko, chairman, Natural Resources Canada Brian Corey, MIT Haystack Observatory Ed Himwich, NVI,

Prospective Improvements of IVS Products and Evolvement of Observing Programs Harald Schuh WG2 Chair Vienna University of Technology

Assessment of Reference Frame Stability trough offset detection in GPS coordinate time series Dragan Blagojević 1), Goran Todorović 2), Violeta Vasilić.

RECENT ENHANCEMENTS TO THE CDDIS IGS Network Systems Workshop November 2-5, 1998 Annapolis, MD Carey E. Noll Manager, CDDIS NASA GSFC Greenbelt, MD.

Chair’s Report 4 th IVS General Meeting Concepción/Chile, January 9-12, 2004 Wolfgang Schlüter Bundesamt für Kartographie und Geodäsie, Fundamentalstation.

The current status of K5 eVLBI intensive session Takashima, Kazuhiro; Machida,Morito; Fujisaku, Junichi; Kokado, Kensuke; Shigematsu, Hiromi Geographical.

Harald Schuh (Chair of the IVS Directing Board) Dirk Behrend (Director of the IVS Coordinating Center) The International VLBI Service for Geodesy and Astrometry.

EVLBI at Wettzell R. Dassing G. Kronschnabl. Wettzell is a Fundamentalstation for Geodesy (i.e. all relevant geodetic measurement systems are collocated.

Combination of long time series of tropospheric parameters observed by VLBI R. Heinkelmann, J. Boehm, H. Schuh Institute of Geodesy and Geophysics, TU.

Earth Surface and Interior Focus Area Space Geodetic Networks for Maintaining the Reference Frame Geodesy's Critical Contributions to NASA (Earth Science)

Evaluation of Global Ionosphere TEC by comparison with VLBI data Mamoru Sekido, Tetsuro Kondo Eiji Kawai, and Michito Imae.

Global VLBI Solution IGG05R01 1 Institute of Geodesy and Geophysics (IGG), Vienna, Austria 2 German Geodetic Research Institute (DGFI), Munich, Germany.

VLBI2010: A Vision for Future Geodetic VLBI This poster summarizes the results of IVS Working Group 3 ‘VLBI2010’, which was charged with creating a vision.

View on GPS and Galileo ‘From across the Atlantic…’ Ruth E. Neilan International GNSS Service (IGS) Central Bureau Jet Propulsion Laboratory/California.

Canada’s Natural Resources – Now and for the Future Broadband Delay Tutorial Bill Petrachenko, NRCan, FRFF workshop, Wettzell, Germany, March 18, 2009.

20 th Meeting of the European VLBI Group for Geodesy and Astrometry (EVGA), Bonn, Germany Wednesday, 28 th March 2011 EVGA – Looking back at the early.

03/000 Effect of the reference radiosource instability on the TRF solution Australian Government Geoscience Australia 4 th General IVS Meeting, 9-13, January,

03/000 VLBI network design Australian Government Geoscience Australia NGRS Workshop, 1-2 February, Canberra.

Geodetic Networks: The Supporting Framework Terrestrial Reference Frame is ‘Critical Infrastructure’ for all Earth science research and applications. Global.

E-VLBI: A Brief Overview Alan R. Whitney MIT Haystack Observatory.

Do we need WVRs for geodetic VLBI? Joerg Wresnik (1), Johannes Boehm (1), Harald Schuh (1), Arthur Niell (2) Workshop on Measurement of Atmospheric Water.

IVS High Accuracy Products for the Maintenance of the Global Reference Frames as a Contribution to GGOS VLBI provides high accuracy and unique products.

Institute of Geodesy and Geophysics, Vienna University of Technology Vienna, February 2004 Harald Schuh Subgroup "Data Analysis" of Working Group 3 VLBI2010.

Comparison of Wet Path Delays, observed with Water Vapour Radiometers, Sun Spectrometer, Radiosondes, GPS and VLBI at the Fundamental Station Wettzell.

IVS Coordinating Center Report Dirk Behrend 4 th IVS General Meeting and 15 th Directing Board Meeting January 9-13, 2006.

E-VLBI – Creating a Global Radio-Telescope Array via High-Speed Networks Alan R. Whitney MIT Haystack Observatory Optical Waves: Who Needs Them and Why?

IERS Combination WG and CPP Meeting, April 27, 2005, TU of Vienna, Austria Status and Future of the IERS Combination Efforts Markus Rothacher GeoForschungsZentrum.

IERS Directing Board Meeting No.39, BIPM Paris, September 23, 2004 IERS2005: Plan “Integrated Earth orientation parameters, Radio sources, and Site coordinates.

e-VLBI: Creating a Global Radio Telescope via High-Speed Networks

Space Geodesy Branch Highlights, August 2002 CONT02 VLBI Campaign

From CONT to VGOS: The Evolution of the CONT Campaigns

Geodetic VLBI activities in China

Haystack Geodesy Program and Technical Development

Towards the ICRF3: Comparing USNO 2016A VLBI Global Solution to Gaia and ICRF2 Megan Johnson in collaboration with Julien Frouard, Alan Fey, Valeri Makarov,

Troposphere and Clock Parameterization During Continuous VLBI Campaigns Kamil Teke1, 2, Johannes Boehm1, Hana Spicakova1, Andrea Pany1, Harald Schuh1 1.

VLBI Estimates of Vertical Crustal Motion in Europe

Correlation coefficients

Presentation transcript:

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS Products for Precise Global Reference Frames Wolfgang Schlüter Bundesamt für Kartographie und Geodäsie Fundamentalstation Wettzell Nancy Vandenberg SNVI, Inc./ Goddard Space Flight Center IVS web page:

35th COSPAR Scientific Assembly, Paris, July 18-25, I V S - International VLBI Service for Geodesy and Astrometry IVS is a service of n IAG - International Association of Geodesy n IAU - International Astronomical Union n FAGS - Federation of Astronomical and Geophysical Data Analysis Services Main tasks of the IVS n global coordination of VLBI components in order to guarantee the provision of the products for u Celestial Reference Frame (CRF) VLBI is fundamental and unique for CRF F IAU Resolution, August 2001 u Terrestrial Reference Frame (TRF) VLBI contributes strongly to TRF (scale) u Earth Orientation Parameter (EOP’s) VLBI provides complete set of EOP, uniquely DUT1 Basis for collaboration and contributions Call of Participation in 1998 Proposals for 73 permanent components, –from 37 Institutions in 17 countries, –~ 250 Associate Members

35th COSPAR Scientific Assembly, Paris, July 18-25, Map of the IVS Components

35th COSPAR Scientific Assembly, Paris, July 18-25, Step to meet Service Requirements n When IVS started the demand for continuity in maintaining the reference frames forced to employ the existing observing programs (NEOS, CORE,.... INT) n 2001 review of products and observing programs ==> Working Group 2  Basis for improving products and evolving observing programs to meet service requirements

35th COSPAR Scientific Assembly, Paris, July 18-25, Review of Products (examples from Working Group 2 Report) Products Status2001Goals( ) n polar motionaccuracy x p ~100  as, y p ~200  asx p, y p :  as latency 1-4 weeks... 4 months4 - 3 days...1day resolution 1 day1 day...1h... 10min freq. of sessions ~3 d/week d/week n UT1accuracy  s  s latency 1 week4 - 3 days.... 1day resolution 1 day1 day min n ,  accuracy  as  as latency 1-4 weeks... 4 months4 - 3days... 1 day resolution 1 day1 day freq. of sessions ~3 d/week d/week n TRF (x,x,z)accuracy 5-20 mm mm n CRFaccuracy mas0.25 mas (improved distribution) freq. of solution 1 y1 y latency 3-6 months month(s) n

35th COSPAR Scientific Assembly, Paris, July 18-25, Improvements within IVS Observing Program u Appropriate observing programs started 2002 for F Earth Orientation Parameters (EOP): IVS-R1... IVS-R4 …, IVS-INT1/2 <Two rapid turn-around sessions each week, <Comparable xp, yp results. <Additional sessions employing S2 and K4 techniques (IVS-E3, IVS-INT2) F Terrestrial Reference Frame (TRF): IVS-T2 <Monthly TRF sessions with 8 stations F Celestial Reference Frame (CRF): RDV and IVS-CRF <RDV: Bi-monthly RDV sessions using the VLBA and up to 10 geodetic stations, <USNO: Source structure, NASA: TRF, NRAO: high precise source positions <IVS CRF (8-10 per year): Astrometric observations for new sources F CONT, whenever required IVS-CONT02 <14-day continuous sessions to demonstrate the best results that VLBI can offer <in 2002: CONT-session, October 16-31, 2002 F Monthly R&D sessions: IVS-R&D <to investigate instrumental effects, research the network offset problem êGeodetic VLBI observations increased by êabout 30% in 2002 compared to 2001 êabout 15% in 2003 compared to 2002 êabout 15% in 2004 compared to 2003

35th COSPAR Scientific Assembly, Paris, July 18-25, Observing Plan Summary

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS sites and cooperating VLBI sites

35th COSPAR Scientific Assembly, Paris, July 18-25, Products for CRF n Monitoring of Sources u Positions u Structure n ICRF-Extension 1 u Completed 1999 u Adding 59 Sources n ICRF-Extension 2 u Completed 2002 u Adding 50 Sources

35th COSPAR Scientific Assembly, Paris, July 18-25, Improved delay from observation to product availability 2 time series per week IVS R1 (Bo, Ha, Wa) IVS R4 (Wash) Results available approximately after two weeks Potential for Improve- ments Acceleration of Transportation (e-VLBI) Correlator processing (employing MK5)

35th COSPAR Scientific Assembly, Paris, July 18-25, Combined EOP’s are regular IVS Products Analysis Coordinator: Axel Notnagel, Univ. Bonn n Complete set of EOP’s n Combined Solution from 5 (6) Analysis Centers n 20-30% improved u accuracy u robustness n R1 & R4 since 2002 Example : DUT1 form R1 and R4

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS Combined Product: Polar Motion X-Pol [µas]Y-Pol [µas] AC X-BiasWRMSY-BiasWRMS AUS-13,5196,01,1217,4 BKG-2,168,46,356,1 GSF2,052,1-1,944,2 IAA0,987,5-2,383,1 USN0,870,9-3,458,7

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS Combined Product: UT1-UTC UT1-UTC [µs] AC X-BiasWRMS AUSO,910,8 BKG0,32,8 GSF0,12,1 IAA-0,42,4 USN-0,22,4

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS Combined Product: d  and  d  dpsi [µas]deps [µas] AC X-BiasWRMSY-BiasWRMS AUS7,7188,1-18,989,4 BKG-23,9209,20,480,5 GSF-53,1196,4-10,176,6 IAA22,9140,814,659,7 USN-8,0219,76,882,2

35th COSPAR Scientific Assembly, Paris, July 18-25, UT1-UTC from INTENSIVES with reference to CO4 MK4: Wettzell - Kokee Park (black) and K4: Wettzell – Tsukuba (red) With compliments from Dorothee Fischer, Univ.Bonn

35th COSPAR Scientific Assembly, Paris, July 18-25, Tropospheric Parameter WZD as IVS product n Wet Zenith Delay u Regular for each R1 or R4 u Hourly resolution n Solution of 5 Analysis Centers n Combined by TU- Vienna n Combined IVS product officially accepted at the 9 th DB-meeting n 2-3mm precission comparable to GPS (or better?) With compliments from H.Schuh et.al., TU-Vienna

35th COSPAR Scientific Assembly, Paris, July 18-25, Total Zenith Delay derived from CONT02 at Gilcreek With compliments from H.Schuh et.al., TU-Vienna

35th COSPAR Scientific Assembly, Paris, July 18-25, Site namebias [mm] stddev [mm] Algopark7.1  4.8 Fortleza13.5  9.5 Gilcreek4.4  3.7 Hartrao5.0  8.1 Hobart263.2  7.4 Matera3.9  6.8 Medicina1.4  4.6 Nyales204.3  3.8 Seshan251.5  6.0 Wettzell2.5  4.3 Onsala604.8  4.5 mean:4.7  5.8 IGS - IVS difference in total zenith delays for all IVS-R1 and IVS-R4 sessions in 2002 after correcting for the station height difference Comparisons of Total Zenith delays: VLBI and GPS

35th COSPAR Scientific Assembly, Paris, July 18-25, IVS Pilot Project: Time Series of Baseline Lengths

35th COSPAR Scientific Assembly, Paris, July 18-25, Further improvements required n Overcome weekend gaps u automation for unattended observing needed n Reduce time delay and reduce expenses u employment of a modern disc based recording system (Mk5) u development of data transfer via the Internet (e-VLBI) u Employ VLBI Standard Interface n Increase robustness of the products, u more analysis centers with different software n Improve Network Configuration u Next VLBI generation (Vision 2010)

35th COSPAR Scientific Assembly, Paris, July 18-25, Digital Recorders n Developments u Haystack- USA (Mk5) u CRL – Japan (K5) n Replacing MKIV by MK5 n Combination of various developments via u VSI (VLBI Standard Interface) n 2004: MK5a to MK5b u VSI included u Station Unit replacement at Correlator MK5A

35th COSPAR Scientific Assembly, Paris, July 18-25, Mark 5 Usage Plan

35th COSPAR Scientific Assembly, Paris, July 18-25, MPI-BKG Correlator Bonn

35th COSPAR Scientific Assembly, Paris, July 18-25, Employing Internet for Datatransmission „E-VLBI“ Required time for the transfer (max. throughput 60%) Connection R1 R4 INT costs / a (WiN) F 64 kbit/s d F 2 Mbit/s 93 d 69 d 3 d F 34 Mbit/s 6 d 4 d 5 h ~ 50.-k€ F 155 Mbit/s 1,2 d 1 d 1 h~180.-k€ F 622 Mbit/s 7 h 5 h 15 m~450.-k€ F 2,4 Gbit/s 1,9 h 1,3 h 4 m

35th COSPAR Scientific Assembly, Paris, July 18-25, E-VLBI n Some demonstrations: u Keystone Project, 100km, CRL Japan F 256Mbit/s, permanent links F 1Gbit/s employing Internet Protocol u Mk 5 and K5 Tests: F 1 Gbit/s „near real time“ and „real time“ Demonstration between Westford MA - USA und GSFC MD - USA F 150Mbit/s experiment between Haystack/USA (MK5) and Kashima/Japan (CRL) (K5) several times 2002 and 2003 n Kashima sends data to Haystack n Intensiv next candidate for (near realtime ) e-VLBI n INT2 employing VSI

35th COSPAR Scientific Assembly, Paris, July 18-25, Vision Paper 2010 focus on „next generation“ geodetic VLBI Working Group WG 3 established at the 10 DB-Meeting: u Needs for a vision paper: F Increasing requirements from IGGOS/IAG F RFI, frequency bands? F Aging antennas F Long term planning u Goals: F Unattended observing, more regular F Improved global coverage F Electronic data transfer F Near real time correlation and product provision F Report in July 2004 u Close collaboration with Radio-Astronomers (SKA)

35th COSPAR Scientific Assembly, Paris, July 18-25, WG3: VISION 2010 nChaired by Alan Whitney and Arthur Niell nSubgroups uObserving Strategies (Bill Petrachenko) FFrequency Bands, RFI FFieldsystem and Scheduling FSource strength /structure /distribution FAntenna network configuration and observing strategies uRF/IF, Frequency and Time (Hayo Hase) FAntennas and Feeds FRF/IF and Calibration FTime and Frequency Standards uBackend Systems (Gino Tuccari) FBackends, digital filtering and BBC’s uData acquisition and transport (Alan Whitney) uCorrelation and fringe finding (Yasuhiro Koyama) uData analysis (Harald Schuh) uData archiving and management (Chopo Ma)

35th COSPAR Scientific Assembly, Paris, July 18-25, Thank you !