jgg     2013 33 (1):  141-144    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH ON HIGH PERFORMANCE GNSS NORMAL EQUATION PROCESSING METHOD BASED ON OPENMP Yang Kai Chongqing Institute of Surveying and Planning for Land Resources and Housing, Chongqing 400020 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null