The 3D representation of the new transformation from the terrestrial to the celestial system.
|
|
- Sabrina Hill
- 6 years ago
- Views:
Transcription
1 The 3D representation of the new transformation from the terrestrial to the celestial system. Véronique Dehant, Olivier de Viron Royal Observatory of Belgium Nicole Capitaine Observatoire de Paris, France
2 Content of my talk (International) Terrestrial Reference System (International) Celestial reference system Motions of one with respect to the other Definition of the Celestial Intermediate pole (CIP) The classical transformation The transformation based on the Non Rotating Origins (NROs) Definition of the NRO and of the Earth Rotation Angle Conclusions
3 Preface When you see this sign:, it means that there is a movie and that you have to wait until the end of the movie before continuing the slide show (pressing page down ).
4 The (International) Terrestrial reference system It must be noted that the "Greenwich meridian", is not called like that anymore but rather the "ITRF zero meridian".
5 The (International) Celestial reference system
6 Two systems in an ideal world; the celestial frame is fixed to the stars and the terrestrial frame is fixed to the Earth; the Earth is uniformly rotating X,Y,Z: for CRS x,y,z: for TRS
7 The less ideal world; the Earth orientation is changing in space; the Earth rotation is not uniform; there is polar motion, precession, nutations, and length-of-day changes; the Earth is nonrigid, deformable, there is plate tectonics, there are oceans and atmosphere,
8 IRS = Intermediate Reference System z TRS z IRS = Z IRS = CIP Z CRS 1. motion of the Celestial Intermediate Pole (CIP) in Earth 2. Earth rotation 3. motion of the Celestial Intermediate Pole (CIP) in space Only the intermediary systems are different when using the new or the classical transformations. The (I)TRS and (I)CRS are not affected. TRS= Terrestrial Reference System (I)TRS= (International) Terrestrial Reference System CRS= Celestial Reference System (I)CRS= (International) Celestial Reference System
9 Definition of the CIP Higher retrograde frequencies +1 cycle/sidereal day (Earth rotation) Higher retrograde frequencies Polar motion Precession and nutation Higher prograde frequencies frequency in TRF in cycle/sidereal day Higher prograde frequencies frequency in CRF in cycle/sidereal day
10 The classical transformation
11 1. From (I)TRS to CIP
12 2. To the True equinox of date
13 How to go from one equinox another? Z Ecliptic 1 Ecliptic 2 y γ 2 γ 1 x Equator 1 Equator 2
14 How to go from one equinox another? Z Ecliptic 1 Ecliptic 2 y y x rotation 1 (z) γ i γ 1 x Equator 1
15 How to go from one equinox another? Z Z Ecliptic 2 y γ i Rotation 2 (x) Equator 1 y x
16 How to go from one equinox another? Z Ecliptic 2 Rotation 3 (z) γ 2 γ i Equator 1 y x x Equator 2
17 How to go from one equinox another? Z Z Ecliptic 2 γ 2 Rotation 4 (x) x Equator 2
18 How to go from one equinox another? Ecliptic 2 γ 2 x Equator 2 It takes 4 operations
19 True ecliptic of date Mean ecliptic of date Equator of basic epoch γ v True equator of date Mean equator of date γ 0 Ecliptic of basic epoch In the classical transformation, one needs to go from the true equinox of date γ v (from which GST is computed) to the equinox of J2000 or even to the equinox γ 0 (considered in the FK5 celestial reference frame). It must be noted that in addition to these transformations, bias between the ICRF and the equinox-based reference frame must be considered; there exists "frame bias" between the mean equator and equinox of J2000 and the ICRS.
20 Transformation based on NROs
21 1. From (I)TRS to CIP
22 2. From CIP to terrestrial NRO
23 3. From terrestrial NRO (TIO,ϖ) to celestial NRO (CIO,σ): Earth Rotation Angle (ERA,θ) (stellar angle)
24 4. From CIO (σ) to X CRF or Σ: s
25 5. From celestial NRO/CIP equator to (X,Y,Z): motion of the CIP in space (precession and nutations)
26 What is the NRO? 1. Characterized by its motion: no rotation around the CIP associated with polar motion or precession/nutation. 2. Not one particular point, any point of the CIP equator is convenient. 3. Allows to get rid of the equinox in the change of reference system and in the definition of Earth rotation.
27
28 So, can we take any points we want? 1. Yes, it is not the point it-self that matter, but its motion. 2. But, we want the new system to be consistent with the classical one. 3. Thus, the point is chosen to insure continuity (January 2003).
29 Definition of NRO 1. The NRO is defined by its position at the basic epoch (continuity); its motion (no motion in the CIP equator associated with CIP motion). 2. The NRO ensures Earth rotation angle being pure rotation (no contamination from CIP motion)
30 Conclusions 1. No change in the definition of precession and nutation and polar motion since CIP definition. 2. The use of the NROs does only change the Intermediate system involved; no change of the ICRS or ITRS; it ensures a good definition of the Earth rotation (no contamination from polar motion of from precession and nutation).
Reference system and non-rotating origin: the NRO for the rest of us Olivier de Viron, Véronique Dehant, and Nicole Capitaine
Reference system and non-rotating origin: the NRO for the rest of us Olivier de Viron, Véronique Dehant, and Nicole Capitaine Abstract The concept of Non Rotating Origin has been introduced in the method
More informationthe precession-nutation parameters and Greenwich sidereal time, which Ephemeris Pole (CEP) has to be extended in order to be consistent with
Denition of the Celestial Ephemeris Pole and the Celestial Ephemeris Origin Nicole Capitaine DANOF/UMR8630-CNRS, Observatoire deparis 61, avenue de l'observatoire, 75014 - Paris, France, capitain@danof.obspm.fr
More informationASTRONOMICAL REFERENCE SYSTEMS AND FRAMES, ASTROMETRIC TECHNIQUES AND CATALOGS
1 ASTRONOMICAL REFERENCE SYSTEMS AND FRAMES, ASTROMETRIC TECHNIQUES AND CATALOGS Jan Vondrák, Astronomical Institute Prague P PART 1: Reference systems and frames used in astronomy:! Historical outline,
More informationIAU 2006 NFA GLOSSARY
IAU 2006 NFA GLOSSARY Prepared by the IAU Division I Working Group Nomenclature for Fundamental Astronomy'' (latest revision: 20 November 2007) Those definitions corresponding to the IAU 2000 resolutions
More informationProposed terminology for Fundamental Astronomy based on IAU 2000 resolutions
Proposed terminology for Fundamental Astronomy based on IAU 2000 resolutions N. Capitaine and A. H. Andrei, M. Calabretta, V. Dehant, T. Fukushima, B. Guinot, C. Hohenkerk, G. Kaplan, S. Klioner, J. Kovalevsky,
More informationOn the definition and use of the ecliptic in modern astronomy
On the definition and use of the ecliptic in modern astronomy Nicole Capitaine (1), Michael Soffel (2) (1) : Observatoire de Paris / SYRTE (2) : Lohrmann Observatory, Dresden Technical University Introduction
More informationReport of the IAU WORKING GROUP "Nomenclature for Fundamental Astronomy" (NFA)
Report of the IAU WORKING GROUP "Nomenclature for Fundamental Astronomy" (NFA) Nicole Capitaine, Observatoire de Paris, France Membership Nicole CAPITAINE (Paris Observatory, France), Chair Catherine HOHENKERK
More informationREPORT OF THE IAU DIVISION 1 WORKING GROUP ON NOMENCLATURE FOR FUNDAMENTAL ASTRONOMY (NFA)
REPORT OF THE IAU DIVISION 1 WORKING GROUP ON NOMENCLATURE FOR FUNDAMENTAL ASTRONOMY (NFA) N. CAPITAINE, Observatoire de Paris, France and C. HOHENKERK, HMNAO, UK; A.H. ANDREI, Observatorio Nacional, Brazil;
More informationDRAFT OF NOMENCLATURE & TERMINOLOGY FOR IAU WG 1
s TIO terrestrial intermediate origin DRAFT OF NOMENCLATURE & TERMINOLOGY FOR IAU WG 1 This is not a complete list. Symbols are not, and need not necessarily be unique, eg φ is used for latitude, both
More informationDIVISION I WORKING GROUP on NOMENCLATURE FOR FUNDAMENTAL ASTRONOMY (NFA)
Transactions IAU, Volume XXVIB Proc. XXVIth IAU General Assembly, August 2006 K.A. van der Hucht, ed. c 2007 International Astronomical Union DOI: 00.0000/X000000000000000X DIVISION I WORKING GROUP on
More information5 Transformation Between the Celestial and Terrestrial Systems
No. 32 5 Transformation Between the Celestial and Terrestrial Systems The coordinate transformation to be used to transform from the terrestrial reference system (TRS) to the celestial reference system
More informationEvaluation of the accuracy of the IAU 2006/2000 precession-nutation
Evaluation of the accuracy of the IAU 2006/2000 precession-nutation Nicole Capitaine (1), Sébastien Lambert (1), Kunliang Yao (1), Jia-cheng Liu (1)(2) (1) SYRTE, Observatoire de Paris, France (2) Nanjing
More informationThe VLBI contribution to precession (present and future)
The VLBI contribution to precession (present and future) N.Capitaine (1) and P. Wallace (2) (1) Observatoire de Paris/Syrte (2) RAL, HMNAO Precession-nutation parameters Classical: equinox-based fixed
More informationDefining Sources Selection and Celestial Reference Frame Stability
The 17th of March, 2016 at Ekudeni, South Africa 9th IVS General Meeting Defining Sources Selection and Celestial Reference Frame Stability GATTANO C.¹, LAMBERT S.¹ ¹ SYRTE, Observatoire de Paris, PSL
More informationTHE FREE CORE NUTATION
THE FREE CORE NUTATION D.D. MCCARTHY U. S. Naval Observatory Washington, DC 20392 USA e-mail: dmc@maia.usno.navy.mil ABSTRACT. The International Earth rotation and Reference system Service (IERS) provides
More informationROCZNIK ASTRONOMICZNY (ASTRONOMICAL ALMANAC) OF THE INSTITUTE OF GEODESY AND CARTOGRAPHY AGAINST THE IAU 2000 RESOLUTIONS
ROCZNIK ASTRONOMICZNY (ASTRONOMICAL ALMANAC) OF THE INSTITUTE OF GEODESY AND CARTOGRAPHY AGAINST THE IAU 2000 RESOLUTIONS M. SĘKOWSKI Institute of Geodesy and Cartography ul. Modzelewskiego 27, Warsaw,
More informationPRECESSION, NUTATION, AND WOBBLE OF THE EARTH
PRECESSION, NUTATION, AND WOBBLE OF THE EARTH Earth rotation has long been used as a measure of time, together with using the stars as reference points, to determine travellers whereabouts on the globe.
More informationDefinition of the Celestial Ephemeris Origin and of UT1 in the International Celestial Reference Frame
Astron. Astrophys. 355, 398 405 (2000) Definition of the Celestial Ephemeris Origin and of UT1 in the International Celestial Reference Frame N. Capitaine 1, B. Guinot 1, and D.D. McCarthy 2 ASTRONOMY
More informationAstrodynamics (AERO0024)
Astrodynamics (AERO0024) 3. The Orbit in Space Gaëtan Kerschen Space Structures & Systems Lab (S3L) Motivation: Space We need means of describing orbits in three-dimensional space. Example: Earth s oblateness
More informationAstrodynamics (AERO0024)
Astrodynamics (AERO0024) 3B. The Orbit in Space and Time Gaëtan Kerschen Space Structures & Systems Lab (S3L) Previous Lecture: The Orbit in Time 3.1 ORBITAL POSITION AS A FUNCTION OF TIME 3.1.1 Kepler
More informationNutation determination by means of GNSS
Nutation determination by means of GNSS - Comparison with VLBI Nicole Capitaine, Kunliang Yao SYRTE - Observatoire de Paris, CNRS/UPMC, France Introduction Space geodetic techniques cannot be used for
More informationApplication of the new concepts and definitions (ICRS, CIP and CEO) in fundamental astronomy. P. K. Seidelmann and J. Kovalevsky
A&A 392, 341 351 (2002) DOI: 10.1051/0004-6361:20020931 c ESO 2002 Astronomy & Astrophysics Application of the new concepts and definitions (ICRS, CIP and CEO) in fundamental astronomy P. K. Seidelmann
More informationSpace-Time Reference Systems
Space-Time Reference Systems Bearbeitet von Michael Soffel, Ralf Langhans 1. Auflage 2012. Buch. xiv, 314 S. Hardcover ISBN 978 3 642 30225 1 Format (B x L): 15,5 x 23,5 cm Gewicht: 654 g Weitere Fachgebiete
More informationSoftware for Implementing the IAU 2000 Resolutions
Software for Implementing the IAU 2000 Resolutions Patrick Wallace H.M. Nautical Almanac Office Space Science and Technology Department CLRC / Rutherford Appleton Laboratory 1 Introduction At its XXIVth
More informationFUNDAMENTAL ASTRONOMY
FUNDAMENTAL ASTRONOMY Magda Stavinschi Astronomical Institute of the Romanian Academy No indication of the distance to the objects The astrometric information is generally NOT the direction from which
More informationThe celestial reference system and its role in the epoch of global geodetic technologies
Reports on Geodesy, vol. 92, no. 1, 2012 The celestial reference system and its role in the epoch of global geodetic technologies Jerzy B. Rogowski 1, Aleksander Brzeziński 1,2 1 Warsaw University of Technology,
More informationCoordinate Systems for Astronomy or: How to get your telescope to observe the right object
Coordinate Systems for Astronomy or: How to get your telescope to observe the right object Figure 1: Basic definitions for the Earth Definitions - Poles, Equator, Meridians, Parallels The rotation of the
More informationGlobal reference systems and Earth rotation
current realizations and scientific problems Aleksander Brzeziński 1,2, Tomasz Liwosz 1, Jerzy Rogowski 1, Jan Kryński 3 1 Department of Geodesy and Geodetic Astronomy Warsaw University of Technology 2
More informationHigh precision methods for locating the celestial intermediate pole and origin ABSTRACT
A&A 45, 855 872 (26) DOI: 1.151/4-6361:25455 c ESO 26 Astronomy & Astrophysics High precision methods for locating the celestial intermediate pole and origin N. Capitaine 1 and P. T. Wallace 2 1 Observatoire
More informationThe International Terrestrial Reference System and ETRS89: Part I : General concepts
The International Terrestrial Reference System and ETRS89: Part I : General concepts Zuheir ALTAMIMI Laboratoire de Recherche en Géodésie Institut national de l information géographique et forestière (IGN),
More informationRecent advances in modeling precession-nutation
Recent advances in modeling precession-nutation Véronique Dehant ROB Sébastien Lambert OP Nicolas Rambaux ROB Marta Folgueira Madrid Univ Laurence Koot ROB v.dehant@oma.be Level 3: rigid Earth nutation
More informationSOFA Tools for Earth Attitude
International Astronomical Union Standards Of Fundamental Astronomy SOFA Tools for Earth Attitude Software version 13 Document revision 1.6 Version for C programming language http://www.iausofa.org 2017
More informationCOMBINING GPS AND VLBI MEASUREMENTS OF CELESTIAL MOTION OF THE EARTH S SPIN AXIS AND UNIVERSAL TIME. Jan VONDRÁK* and Cyril RON
Acta Geodyn. Geomater., Vol.2, No.3 (139), 87-94, 2005 COMBINING GPS AND VLBI MEASUREMENTS OF CELESTIAL MOTION OF THE EARTH S SPIN AXIS AND UNIVERSAL TIME Jan VONDRÁK* and Cyril RON Department of Galaxies
More informationThe final publication is available at Springer. DOI: / _6
Originally published as: Seitz, F., H. Schuh: Earth Rotation. In: Sciences of Geodesy I: Advances and Future Directions, Xu, G. (Ed.), 185 227, Springer, Heidelberg, ISBN 978 3 642 11744, 21. The final
More informationSOFA Tools for Earth Attitude
International Astronomical Union Standards Of Fundamental Astronomy SOFA Tools for Earth Attitude Software version 4 Document revision 1.0 http://www.iau-sofa.rl.ac.uk/ 2007 August 1 IAU STANDARDS OF FUNDAMENTAL
More informationCHAPTER 5 TRANSFORMATION BETWEEN THE CELESTIAL AND
CHAPTER 5 TRANSFORMATION BETWEEN THE CELESTIAL AND TERRESTRIAL SYSTEMS The coordinate transformation to be used from the TRS to the CRS at the date t of the Observation can be written as: [CRS] = PN(t).R(t)-W(t)
More informationTorsten Mayer-Gürr Institute of Geodesy, NAWI Graz Technische Universität Graz
GGOS and Reference Systems errestrial systems and Earth rotation 2015-11-23 orsten Mayer-Gürr Institute of Geodesy, NAWI Graz echnische Universität Graz orsten Mayer-Gürr 1 Celestial systems (Quasi-) inertial
More informationOptical Reference Star Catalogs for Space Surveillance: Current Status and Future Plans
Optical Reference Star Catalogs for Space Surveillance: Current Status and Future Plans P.K. Seidelmann, University of Virginia R. Gaume, N. Zacharias, K. Johnston, B. Dorland U.S. Naval Observatory Abstract
More information1. COMMENTS ON TERMINOLOGY: IDEAL AND CONVENTIONAL REFERENCE SYSTEMS AND FRAMES
COMMENTS ON CONVENTIONAL TERRESTRIAL AND QUASI-INERTIAL REFERENCE SYSTEMS Jean Kovalevsky Ivan I. Mueller Centre d 1 Etudes et de Recherches Department of Geodetic Science Geodynamiques et Astronomiques
More informationAstronomy and Earth s Rotation with GEODESIE
Astronomy and Earth s Rotation with GEODESIE Sébastien Lambert SYRTE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, LNE What Science can we make Answer
More informationCelestial Reference Systems:
Celestial Reference Systems: Stability and Alignment G. Bourda Laboratoire d Astrophysique de Bordeaux (LAB) Observatoire Aquitain des Sciences de l Univers (OASU) Université Bordeaux 1 Floirac FRANCE
More information4-4 Role of VLBI Technology in the Space-Time Standards
4-4 Role of VLBI Technology in the Space-Time Standards In the VLBI observations, signals from Quasars which are realizing the current Celestial Reference Frame are directly used, and therefore all of
More information2 Conventional Celestial Reference System and Frame
The celestial reference system is based on a kinematical definition, making the axis directions fixed with respect to the distant matter of the universe. The system is materialized by a celestial reference
More informationRotation and Interior of Terrestrial Planets
Rotation and Interior of Terrestrial Planets Veronique Dehant and Tim Van Hoolst Royal Observatory of Belgium introduction WHAT DO WE KNOW ABOUT THE MEAN ROTATION AND INTERIOR OF THE PLANETS? Orbit, rotation
More informationOrbits. von Guochang Xu. 1. Auflage. Orbits Xu schnell und portofrei erhältlich bei beck-shop.de DIE FACHBUCHHANDLUNG
Orbits von Guochang Xu 1. Auflage Orbits Xu schnell und portofrei erhältlich bei beck-shop.de DIE FACHBUCHHANDLUNG Thematische Gliederung: Astronomische Beobachtung: Observatorien, Instrumente, Methoden
More informationGOCE High Level Processing Facility. GOCE Standards. Doc. No.: GO-TN-HPF-GS-0111 Issue: 4 Revision: 0 Date: 14 / 05 / 2014
15.2014 1 of 81 GOCE High Level Processing Facility GOCE Standards Doc. No.: 4 Revision: 0 14 / 05 / 2014 Prepared by: The European GOCE Gravity Consortium EGG-C 1 15.2014 2 of 81 Document Information
More informationGeometry of Earth Sun System
12S56 Geometry of Earth Sun System Figure below shows the basic geometry Northern Hemisphere Winter ω equator Earth s Orbit Ecliptic ω ω SUN equator Northern Hemisphere Spring Northern Hemisphere Fall
More informationRecent and Anticipated Changes to the International Earth Rotation and Reference Systems Service (IERS) Conventions
Recent and Anticipated Changes to the International Earth Rotation and Reference Systems Service (IERS) Conventions Brian Luzum, U.S. Naval Observatory BIOGRAPHY Brian Luzum began full-time employment
More informationAstronomy. Astrophysics. Expressions for IAU 2000 precession quantities. N. Capitaine 1,P.T.Wallace 2, and J. Chapront 1. 1.
A&A 42, 567 586 (2003) DOI: 0.05/0004-636:2003539 c ESO 2003 Astronomy & Astrophysics Expressions for IAU 2000 precession quantities N. Capitaine,P.T.Wallace 2, and J. Chapront Observatoire de Paris, SYRTE/UMR8630-CNRS,
More informationElements of Geodesy. Shape of the Earth Tides Terrestrial coordinate systems Inertial coordinate systems Earth orientation parameters
Elements of Geodesy Shape of the Earth Tides Terrestrial coordinate systems Inertial coordinate systems Earth orientation parameters E. Calais Purdue University - EAS Department Civil 3273 ecalais@purdue.edu
More informationTorsten Mayer-Gürr Institute of Geodesy, NAWI Graz Technische Universität Graz
GGOS and Reference Systems Introduction 2015-10-12 Torsten Mayer-Gürr Institute of Geodesy, NAWI Graz Technische Universität Graz Torsten Mayer-Gürr 1 Course and exam Lecture Monday 14:00 16:00, A111 (ST01044)
More informationPubl. Astron. Obs. Belgrade No. 91 (2012), REALIZATION OF ETRF2000 AS A NEW TERRESTRIAL REFERENCE FRAME IN REPUBLIC OF SERBIA
Publ. Astron. Obs. Belgrade No. 91 (2012), 199-206 Contributed paper REALIZATION OF ETRF2000 AS A NEW TERRESTRIAL REFERENCE FRAME IN REPUBLIC OF SERBIA D. BLAGOJEVIĆ and V. VASILIĆ Faculty of Civil Engineering,
More informationOriginally published as:
Originally published as: Seitz M., Steigenberger P., Artz T. (2xx) Consistent adjustment of combined terrestrial and celestial reference frames, Earth on the Edge: Science for a Sustainable Planet, IAG
More informationMAE 180A: Spacecraft Guidance I, Summer 2009 Homework 2 Due Tuesday, July 14, in class.
MAE 180A: Spacecraft Guidance I, Summer 2009 Homework 2 Due Tuesday, July 14, in class. Guidelines: Please turn in a neat and clean homework that gives all the formulae that you have used as well as details
More informationIntroduction to geodetic VLBI
Introduction to geodetic VLBI David Mayer Andreas Hellerschmied Johannes Böhm Harald Schuh and Johannes Böhm, Very Long Baseline Interferometry for Geodesy and Astrometry, in Guochang Xu (editor): Sciences
More informationOptical Reference Stars for Space Surveillance: Future Plans: Latest developments
Optical Reference Stars for Space Surveillance: Future Plans: Latest developments P.K. Seidelmann, University of Virginia R. Gaume, N. Zacharias, K. J. Johnston, B. Dorland U.S. Naval Observatory Abstract
More informationM2 GLOSSARY aphelion: the point in an orbit that is the most distant from the Sun. apocenter: the point in an orbit that is farthest from the origin o
M1 T: the difference between Terrestrial Time (TT) and Universal Time (UT): T = TT UT1. UT1 (or UT): the value of the difference between Universal Time (UT) and Coordinated Universal Time (UTC): UT1 =
More informationaberration (of light): aberration, annual: aberration, diurnal: aberration, E-terms of: aberration, elliptic: aberration, planetary:
M1 aberration (of light): the relativistic apparent angular displacement of the observed position of a celestial object from its geometric position, caused by the motion of the observer in the reference
More informationPrinciples of Global Positioning Systems Spring 2008
MIT OpenCourseWare http://ocw.mit.edu 12.540 Principles of Global Positioning Systems Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. 12.540
More informationComparison between high precision precession models for the ecliptic and the equator
A&A 421, 365 379 (2004) DOI: 10.1051/0004-6361:20035942 c ESO 2004 Astronomy & Astrophysics Comparison between high precision precession models for the ecliptic and the equator N. Capitaine 1,P.T.Wallace
More informationGOCE High Level Processing Facility. GOCE Standards. Doc. No.: GO-TN-HPF-GS-0111 Issue: 3 Revision: 1 Date: 30 / 04 / 2009
1 of 81 GOCE High Level Processing Facility GOCE Standards Doc. No.: 3 Revision: 1 30 / 04 / 2009 Prepared by: The European GOCE Gravity Consortium EGG-C 1 2 of 81 Document Information Sheet Document Name
More informationThe Measurement of Time
CHAPTER TWO The Measurement of Time Solar Time In antiquity the time of day was measured by the direction of a shadow cast in sunlight. This resulted in the development of a wide variety of sophisticated
More informationPast, present and possible updates to the IERS Conventions. J. Ray, NGS G. Petit, BIPM
Past, present and possible updates to the IERS Conventions J. Ray, NGS G. Petit, BIPM IERS Conventions update: electronic access http://tai.bipm.org/iers/convupdt/listupdt.html Introduction Add a set of
More informationCommon Realization of Terrestrial and Celestial Reference Frame
Common Realization of Terrestrial and Celestial Reference Frame M. Seitz, R. Heinkelmann, P. Steigenberger, T. Artz Abstract The realization of the International Celestial Reference System (ICRS) and the
More informationSOFA Astrometry Tools
International Astronomical Union Standards Of Fundamental Astronomy SOFA Astrometry Tools Software version 14 Document revision 1.8 Version for Fortran programming language http://www.iausofa.org 2017
More informationThese notes may contain copyrighted material! They are for your own use only during this course.
Licensed for Personal Use Only DO NOT DISTRIBUTE These notes may contain copyrighted material! They are for your own use only during this course. Distributing them in anyway will be considered a breach
More informationNational Astronomical Observatory, Mitaka, Tokyo , Japan. proper motion system of the Hipparcos frame. The analysis suggests
Examination of the Hipparcos Proper Motion System from Lunar Occultation Analysis Mitsuru S^oma National Astronomical Observatory, Mitaka, Tokyo 181-8588, Japan somamt@cc.nao.ac.jp Abstract. Lunar occultations
More informationGRACE (CSR-GR-03-03)
GRACE 327-742 () GRAVITY RECOVERY AND CLIMATE EXPERIMENT UTCSR Level-2 Processing Standards Document For Level-2 Product Release 0001 (Rev 1.0, December 1, 2003) Srinivas Bettadpur Center for Space Research
More informationDETERMINATION OF THE STATION COORDINATES FOR QUALITY CONTROL OF THE SATELLITE LASER RANGING DATA S.
DETERMINATION OF THE STATION COORDINATES FOR QUALITY CONTROL OF THE SATELLITE LASER RANGING DATA S. Schillak Space Research Centre of the Polish Academy of Sciences. Astrogeodynamic Observatory, Borowiec
More informationEarth orientation parameters: excitation by atmosphere, oceans and geomagnetic jerks
Earth orientation parameters: excitation by atmosphere, oceans and geomagnetic jerks Jan Vondrák and Cyril Ron, Astronomical Inst., Czech Academy of Sciences, Prague Contents: Introduction; Description
More informationVery Long Baseline Interferometry for Geodesy and Astrometry
VieVS User-Workshop 2017 Very Long Baseline Interferometry for Geodesy and Astrometry Johannes Böhm VLBI How does it work? VLBI a flowchart SINEX skd vex2 drudge drudge snp/prc snp/prc NGS Mark4 Mark4
More information1-2. What is the name given to the path of the Sun as seen from Earth? a.) Equinox b.) Celestial equator c.) Solstice d.) Ecliptic
Chapter 1 1-1. How long does it take the Earth to orbit the Sun? a.) one sidereal day b.) one month c.) one year d.) one hour 1-2. What is the name given to the path of the Sun as seen from Earth? a.)
More informationHigh frequency variations of the Earth s instantaneous angular velocity vector
Astron. Astrophys. 317, 61 69 (1997) ASTRONOMY AND ASTROPHYSICS High frequency variations of the Earth s instantaneous angular velocity vector Determination from VLBI data analysis S. Bolotin, C. Bizouard,
More informationRemaining error sources in the nutation at the submilliarc second level
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, NO. B5, 2275, doi:10.1029/2002jb001763, 2003 Remaining error sources in the nutation at the submilliarc second level V. Dehant, 1 M. Feissel-Vernier, 2,3 O. de
More informationThe International Terrestrial Reference System and ETRS89: Part II : ITRS & ETRS89 relationship
The International Terrestrial Reference System and ETRS89: Part II : ITRS & ETRS89 relationship Zuheir ALTAMIMI Laboratoire de Recherche en Géodésie Institut national de l information géographique et forestière
More informationWelcome to Astronomy 402/602
Welcome to Astronomy 402/602 Introductions Syllabus Telescope proposal Coordinate Systems (Lecture) Coordinate System Exercise Light (Lecture) Telescopes (Lecture) Syllabus Course goals Course expectations
More informationModern Navigation. Thomas Herring
12.215 Modern Navigation Thomas Herring Review of Monday s Class Spherical Trigonometry Review plane trigonometry Concepts in Spherical Trigonometry Distance measures Azimuths and bearings Basic formulas:
More informationVery Long Baseline Interferometry for Geodesy and Astrometry
Very Long Baseline Interferometry for Geodesy and Astrometry Johannes Böhm Harald Schuh and Johannes Böhm, Very Long Baseline Interferometry for Geodesy and Astrometry, in Guochang Xu (editor): Sciences
More informationThe UCAC3 Star Catalog: A New Catalog of Optical Reference Stars for Space Surveillance
The UCAC3 Star Catalog: A New Catalog of Optical Reference Stars for Space Surveillance R. Gaume, N. Zacharias U.S. Naval Observatory P. K. Seidelmann, University of Virginia K. J. Johnston U.S. Naval
More informationUpdate on the International Terrestrial Reference Frame (ITRF) : ITRF2014. Zuheir Altamimi
Update on the International Terrestrial Reference Frame (ITRF) : ITRF2014 Zuheir Altamimi Head of the IERS ITRF Product Center IAG Vice President IGN, France E-mail: zuheir.altamimi@ign.fr Key Points Introduction:
More informationThe sky and the celestial sphere
Chapter 1 The sky and the celestial sphere The Sun, and sometimes the Moon are, by and large, the only astronomical objects visible in the day sky. Traditionally, astronomy has been a nocturnal activity.
More informationChallenges and perspectives for CRF and TRF determination
Challenges and perspectives for CRF and TRF determination J. Böhm, Z. Malkin, S. Lambert, C. Ma with contributions by H. Spicakova, L. Plank, and H. Schuh Consistency TRF EOP CRF ITRF2008 from VLBI/GNSS/SLR/DORIS
More informationCurrent status of the ITRS realization
Current status of the ITRS realization Input data Principles for datum definition Combination strategies (3 CCs) Some notes on ITRF2005 Next ITRF solution (?) Zuheir Altamimi ITRS PC ITRF Input Data Up
More informationNumerical evidence for the inconsistent separation of the ITRF-ICRF transformation into precession-nutation, diurnal rotation and polar motion
Numerical evidence for the inconsistent separation of the ITRF-ICRF transformation into precession-nutation, diurnal rotation and polar motion Athanasios Dermanis and Dimitrios Tsoulis Aristotle University
More informationis a revolution relative to a fixed celestial position. is the instant of transit of mean equinox relative to a fixed meridian position.
PERIODICITY FORMULAS: Sidereal Orbit Tropical Year Eclipse Year Anomalistic Year Sidereal Lunar Orbit Lunar Mean Daily Sidereal Motion Lunar Synodical Period Centenial General Precession Longitude (365.25636042
More informationGeodesy What is it, and why do I like it?
Geodesy What is it, and why do I like it? AVN Training School, HartRAO, 20.03.2018 Maria Karbon Institut für Geodäsie und Geoinformation Uni Bonn Introducing myself I am Maria Karbon from Seis am Schlern,
More informationREPORT OF THE INTERNATIONAL ASTRONOMICAL UNION DIVISION I WORKING GROUP ON PRECESSION AND THE ECLIPTIC
Celestial Mechanics and Dynamical Astronomy (2006) 94:351 367 DOI 10.1007/s10569-006-0001-2 Springer 2006 REPORT OF THE INTERNATIONAL ASTRONOMICAL UNION DIVISION I WORKING GROUP ON PRECESSION AND THE ECLIPTIC
More informationDynamics of the Earth
Time Dynamics of the Earth Historically, a day is a time interval between successive upper transits of a given celestial reference point. upper transit the passage of a body across the celestial meridian
More informationKnowing the Heavens. Goals: Constellations in the Sky
Goals: Knowing the Heavens To see how the sky changes during a night and from night to night. To measure the positions of stars in celestial coordinates. To understand the cause of the seasons. Constellations
More informationIntroduction to Astronomy
Introduction to Astronomy AST0111-3 (Astronomía) Semester 2014B Prof. Thomas H. Puzia Theme Our Sky 1. Celestial Sphere 2. Diurnal Movement 3. Annual Movement 4. Lunar Movement 5. The Seasons 6. Eclipses
More informationIntroduction to geodetic VLBI and VieVS software
Introduction to geodetic VLBI and VieVS software Hana Krásná and colleagues April 15, 2014 Hartebeesthoek Radio Astronomy Observatory, South Africa Introduction to geodetic VLBI Introduction to VieVS Our
More informationKnowing the Heavens. Goals: Constellations in the Sky
Goals: Knowing the Heavens To see how the sky changes during a night and from night to night. To measure the positions of stars in celestial coordinates. To understand the cause of the seasons. Constellations
More informationCELESTIAL COORDINATES
ASTR 1030 Astronomy Lab 27 Celestial Coordinates CELESTIAL COORDINATES GEOGRAPHIC COORDINATES The Earth's geographic coordinate system is familiar to everyone - the north and south poles are defined by
More informationLOCATING CELESTIAL OBJECTS: COORDINATES AND TIME. a. understand the basic concepts needed for any astronomical coordinate system.
UNIT 2 UNIT 2 LOCATING CELESTIAL OBJECTS: COORDINATES AND TIME Goals After mastery of this unit, you should: a. understand the basic concepts needed for any astronomical coordinate system. b. understand
More informationSecond-order torque on the tidal redistribution and the Earth s rotation ABSTRACT
A&A 453, 363 369 (2006) DOI: 10.1051/0004-6361:20054516 c ESO 2006 Astronomy & Astrophysics Second-order torque on the tidal redistribution and the Earth s rotation S. B. Lambert 1, andp.m.mathews 2 1
More informationChapter 1 Image Slides. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Chapter 1 Image Slides Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CH. 1: CYCLES OF THE SKY CO a 1.1 The Celestial Sphere CO b The nearest star to us is about
More informationIERS Conventions (2003)
International Earth Rotation and Reference Systems Service () Service International de la Rotation Terrestre et des Systèmes de Référence No. 32 Conventions (2003) Dennis D. McCarthy 1 and Gérard Petit
More informationASTRONOMICAL COORDINATE SYSTEMS CELESTIAL SPHERE
ASTRONOMICAL COORDINATE SYSTEMS CELESTIAL SPHERE To the naked eye, stars appear fixed on the sky with respect to one another. These patterns are often grouped into constellations. Angular measurements
More informationIntroduction To Astronomy Lesson 1
Introduction To Astronomy Lesson 1 Topics for this Lesson Earth Based Coordinates The Celestial Sphere and Sky Coordinates The North Star Measuring Distances on the Sky The Motion of Objects in the Sky
More informationGRACE. Gravity Recovery and Climate Experiment. JPL Level-2 Processing Standards Document. For Level-2 Product Release 05.1
GRACE Gravity Recovery and Climate Experiment JPL Level-2 Processing Standards Document For Level-2 Product Release 05.1 Michael M. Watkins and Dah-Ning Yuan Jet Propulsion Laboratory California Institute
More information