jgg     2015 35 (6):  1017-1020    ISSN: 0412-1961  CN: 21-1139/TG The Interpolation Application of Interval Quartering Algorithm of Singular  Spectrum Analysis Iterative in GPS Coordinate Time Series 1 Geomatics College, Shandong University of Science and Technology, 579 Qiangangwan Road, Qingdao 266590, China 2 Chinese Academy of Surveying and Mapping, 28 West-Lianhuachi Road, Beijing 100830, China 3 Space Research Centre, School of Mathematical and Geospatial Sciences, RMIT University,  GPO BOX 2476 Melbourne, Victoria 3001, Australia Received: 2015-03-06  Revised: null  Online: 2015-12-01 Supporting info