jgg     2012 32 (1):  47-50    ISSN: 0412-1961  CN: 21-1139/TG BRIEF INTRODUCTION OF ITRF2008 FRAME Cheng Yingyan Chinese Academy of Surveying and Mapping, Beijing 100830 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null