caa a22 4500 475737334 CHVBK 20180406123450.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1007/s001900050001 doi (NATIONALLICENCE)springer-10.1007/s001900050001 Gross R. S. Jet Propulsion Laboratory, California Institute of Technology, Mail Stop 238-332, 4800 Oak Grove Drive, Pasadena, CA 91109, USA e-mail: richard.gross@jpl.nasa.gov; Tel.: +1 818 354 4010; Fax: +1 818 393 6890, US aut Combinations of Earth-orientation measurements: SPACE97, COMB97, and POLE97 [Elektronische Daten] [R. S. Gross] Abstract.: Independent Earth-orientation measurements taken by the space-geodetic techniques of lunar and satellite laser ranging, very-long-baseline interferometry, and the global positioning system have been combined using a Kalman filter. The resulting combined Earth-orientation series, SPACE97, consists of values and uncertainties for universal time, polar motion, and their rates spanning the period 28 September 1976 to 3 January 1998 at daily intervals. The space-geodetic measurements used to generate SPACE97 have then been combined with optical astrometric measurements to form two additional combined Earth-orientation series: (1) COMB97, consisting of values and uncertainties for universal time, polar motion, and their rates spanning the period 20 January 1962 to 1 January 1998 at 5-day intervals, and (2) POLE97, consisting of values and uncertainties for polar motion and its rate spanning the period 20 January 1900 to 21 December 1997 at monthly intervals. Springer-Verlag Berlin Heidelberg, 2000 Key words: Earth rotation - Combination - Kalman filter nationallicence https://doi.org/10.1007/s001900050001 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001900050001 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Gross R. S. Jet Propulsion Laboratory, California Institute of Technology, Mail Stop 238-332, 4800 Oak Grove Drive, Pasadena, CA 91109, USA e-mail: richard.gross@jpl.nasa.gov; Tel.: +1 818 354 4010; Fax: +1 818 393 6890, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer