LEADER 04110nam 2200601 a 450 001 9910438115503321 005 20200520144314.0 010 $a3-642-30226-2 024 7 $a10.1007/978-3-642-30226-8 035 $a(CKB)2670000000279623 035 $a(EBL)972748 035 $a(OCoLC)819816603 035 $a(SSID)ssj0000799166 035 $a(PQKBManifestationID)11442905 035 $a(PQKBTitleCode)TC0000799166 035 $a(PQKBWorkID)10757480 035 $a(PQKB)10729864 035 $a(DE-He213)978-3-642-30226-8 035 $a(MiAaPQ)EBC972748 035 $a(PPN)168316161 035 $a(EXLCZ)992670000000279623 100 $a20121109d2013 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aSpace-time reference systems /$fMichael Soffel ; Ralf Langhans 205 $a1st ed. 2013. 210 $aHeidelberg $cSpringer$d2013 215 $a1 online resource (320 p.) 225 0$aAstronomy and astrophysics library,$x0941-7834 300 $aDescription based upon print version of record. 311 $a3-642-44313-3 311 $a3-642-30225-4 320 $aIncludes bibliographical references and index. 327 $aList of Symbols -- Preface -- 1 Introduction -- 2 Time -- 3 Space-Time -- 4 Barycentric Dynamical Reference System -- 5 Classical Astronomical Coordinates -- 6 Astrometry -- 7 Celestial Reference System -- 8 Terrestrial Reference System -- 9 From the GCRS to the ITRS -- 10 Astronomical Software ? Yearbooks -- 11 Astronomical constants -- References -- List of acronyms -- Appendix A: Solutions to Exercises -- Appendix B: Description of the AstroRef Package -- Index 304. 330 $aThe high accuracy of modern astronomical spatial-temporal reference systems has made them considerably complex. This book offers a comprehensive overview of such systems. It begins with a discussion of ?The Problem of Time?, including recent developments in the art of clock making (e.g., optical clocks) and various time scales. The authors address  the definitions and realization of spatial coordinates by reference to remote celestial objects such as quasars. After an extensive treatment of classical equinox-based coordinates, new paradigms for setting up a celestial reference system are introduced that no longer refer to the translational and rotational motion of the Earth. The role of relativity in the definition and realization of such systems is clarified. The topics presented in this book are complemented by exercises (with solutions). The authors offer a series of files, written in Maple, a standard computer algebra system, to help readers get a feel for the various models and orders of magnitude. Beyond astrometry, the main fields of application of high-precision astronomical spatial-temporal reference systems and frames are navigation (GPS, interplanetary spacecraft navigation) and global geodynamics, which provide a high-precision Celestial Reference System and its link to any terrestrial spatial-temporal reference system. Mankind?s urgent environmental questions can only be answered in the context of appropriate reference systems in which both aspects, space and time, are realized with a sufficiently high level of accuracy. This book addresses all those interested in high-precision reference systems and the various techniques (GPS, Very Long Baseline Interferometry, Satellite Laser Ranging, Lunar Laser Ranging) necessary for their realization, including the production and dissemination of time signals.  . 410 0$aAstronomy and Astrophysics Library,$x0941-7834 606 $aCelestial reference systems 606 $aTime$xSystems and standards 615 0$aCelestial reference systems. 615 0$aTime$xSystems and standards. 676 $a526.1 700 $aSoffel$b Michael$0910496 701 $aLanghans$b Ralf$01759810 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910438115503321 996 $aSpace-time reference systems$94198464 997 $aUNINA