Combinations of Earth Orientation Measurements: SPACE2011, COMB2011, and POLE2011

Combinations of Earth Orientation Measurements: SPACE2011, COMB2011, and POLE2011
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发表时间:
2013-02
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通讯作者:
J. T. Ratcliff;R. Gross
J. T. Ratcliff;R. Gross
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其他
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作者:
J. T. Ratcliff;R. Gross

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利用卡尔曼滤波器将月球和卫星激光测距、甚长基线干涉测量和全球定位系统的空间大地测量技术所进行的独立地球定向测量结合起来。由此产生的组合地球方位系列,SPACE 2011,包括世界时的值和不确定性,极地运动,以及它们的速率,从1976年9月28日到2012年7月13日,每天的间隔,并在午夜或中午给出历元的版本中提供。用于生成SPACE 2011的空间大地测量数据随后与光学天体测量数据相结合,形成另外两个地球定向组合系列:(1)COMB 2011,包括世界时、极移及其速率的值和不确定性,时间跨度为1962年1月20日至2012年7月13日,每日间隔,也可在午夜或中午给出的时间段的版本中获得;以及(2)POLE 2011,包括1900年1月20日至2012年6月21日期间极移及其速率的值和不确定性,间隔30.4375天。
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, SPACE2011, consists of values and uncertainties for Universal Time, polar motion, and their rates that span from September 28, 1976, to July 13, 2012, at daily intervals and is available in versions with epochs given at either midnight or noon. The space-geodetic measurements used to generate SPACE2011 have then been combined with optical astrometric measurements to form two additional combined Earth orientation series: (1) COMB2011, consisting of values and uncertainties for Universal Time, polar motion, and their rates that span from January 20, 1962, to July 13, 2012, at daily intervals and which are also available in versions with epochs given at either midnight or noon; and (2) POLE2011, consisting of values and uncertainties for polar motion and its rate that span from January 20, 1900, to June 21, 2012, at 30.4375-day intervals.