Influence of Thermal Expansion Effect on GNSS Short Baseline Coordinate Time Series
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摘要: 天线观测墩及基岩的热膨胀效应会造成全球卫星导航系统(GNSS)基准站坐标时间序列非线性变化,本文利用长期观测数据评估了热膨胀效应对GNSS短基线时间序列周期特性的影响. 结果表明:热膨胀效应在高程上可以引起约1 mm的季节性周年信号,可以很好地解释GNSS短基线时间序列中的周期信号,而对平面方向的贡献不大,但是观测墩因日光照射受热不均产生的热弯曲对平面方向上的影响应予以考虑.Abstract: Thermal expansion effect of antenna observation pier and bedrock can cause nonlinear change of coordinate time series of global navigation satellite system (GNSS) reference station. In this paper, the effects of thermal expansion on the periodic characteristics of GNSS short baseline time series are evaluated using longterm GNSS observations. The results show that the thermal expansion effect can induce seasonal annual signal of about 1 mm in vertical, and can well explain the periodic signal of GNSS short baseline time series, but has little contribution to the plane direction. However, the effect of thermal bending caused by uneven sunlight irradiation on the plane direction should be considered.
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Key words:
- GNSS /
- short baseline /
- coordinate time series /
- thermal expansion
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[1] [1]刘邢巍,席瑞杰.次周日周期信号对GNSS时间序列长周期项的影响[J].大地测量与地球动力学,2018,38(3):293-298. [2] SCHENEWERK M S, VAN DAM T M, NEREM R S. Seasonal motion in the Annapolis, Maryland GPS monument[J].GPS Solution,1999,2(3):41-49. [3] SANTAMARAG MEZ A. Very short baseline interferometry: assessment of the relative stability of the GPS stations at the Yebes observatory (Spain)[J].Studia Geophysica et Geodaetica, 2013(57):233-252. [4] YAN H, CHEN W, ZHU Y, et al. Contributions of thermal expansion of monuments and nearby bedrock to observed GPS height change[J]. Geophysical research letters,2009,36(13).L13301.Doi: 101029/20099GL038152. [5] DONG D, FANG P, BOCK Y, et al. Anatomy of apparent seasonal variations from GPSderived site position time series[J]. Journal of Geophysical Research: Solid Earth (1978—2012), 2002, 107(B4): ETG 9-1-ETG 9-16. [6] 姜卫平,刘鸿飞,周晓慧,等.利用连续GPS观测数据分析水库长期变形[J].测绘学报,2012,41(5):682-689. [7] 姜卫平,王锴华,邓连生,等.热膨胀效应对GNSS基准站垂向位移非线性变化的影响[J].测绘学报,2015,44(5):473-480. [8] HAAS R, BERGSTRAND S, LEHNER W. Evaluation of GNSS monument stability. In Reference frames for applications in geosciences[M].Berlin: Springer,2013:45-50. [9] HILL E M, DAVIS J L, ELSEGUI P, et al. Characterization of sitespecific GPS errors using a short-baseline network of braced monuments at Yucca Mountain, southern Nevada[J].Journal of Geophysical Research, 2009(114), B11402.[10] KING M A, WILLIAMS S D P, Apparent stability of GPS monumentation from short-baseline time series[J]. Journal of Geophysical Research, 2009(114):B10403.doi: 10.1029/2009JB006319 [10] 乔学军,王琪,吴云,等,中国大陆GPS基准站的时间序列特征[J].武汉大学学报(信息科学版),2003,28(4):413-416. [11] 黄立人. GPS基准站坐标分量时间序列的噪声特性分析[J]. 大地测量与地球动力学,2006,26(2):31-33,38. [12] WILLIAMS S D P, CATS: GPS coordinate time series analysis software[J]. GPS Solution, 2008(12): 147-153. [13] LIDERG M, LILJE M. Reports in Geodesy and geographical information systems[R].2007.
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