jgg     2010 30 (2):  141-143    ISSN: 0412-1961  CN: 21-1139/TG ON TRANSFORM BETWEEN ITRFS Liu Li ;and Cheng Yingyan Chinese Academy of Surveying & Mapping, Beijing 100039 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null