摘要
从重力场模型的大地水准面起伏误差阶方差以及位系数差阶方差角度,对近几年已经公布的基于GOCE卫星数据建立的重力场模型的精度进行分析。结果显示:1)GO_CONS_GCF_2_TIM_R3、GO_CONS_GCF_2_DIR_R2、GO_CONS_GCF_2_SPW_R2等GOCE-only模型在150~180阶之间每阶的精度较ITG-GRACE2010S等GRACE-only模型提高了一个数量级;2)基于直接法解算的重力场模型精度最高,时域法次之,空域法最低;3)目前,GOCE卫星恢复地球重力场模型的最大能力为250阶次,在250阶处的累计大地水准面精度约为14.7 cm。
The precision of gravity filed models established on GOCE data were compared and analysed accord-ing to geoid errors degree variances and degree variances of potential coefficient.The results indicate that:1)The precision of GOCE-only models is an order of magnitude higher than GRACE-only models,between 150 and 180 de-gree.2)The accuracy of gravity filed models which based on direct approach is highest,followed by time-wise ap-proach and the minimum is space-wise approach.3)At present,the maximum degree of earth gravity filed models which derived from GOCE datas is 250 and the accumulative geoid errors degree variances at 250 degree is about 14.7 cm.
作者
郑增记
曹建平
范丽红
韩美涛
Zheng Zengji;Cao Jianping;Fan Lihong;Han Meitao(Earthquake Administration of Shaanxi Province,Xi’an 710068;School of Geology Engineering and Geomatics,Chang'an University,Xi’an 710054)
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第6期109-113,共5页
Journal of Geodesy and Geodynamics
基金
中国地震局地震行业科研专项(201208009)
