jgg     2014 34 (2):  60-63    ISSN: 0412-1961  CN: 21-1139/TG NOISE ANALYSIS ON GPS COORDINATE TIME SERIES BASED  ON MAXIMUM ENTROPY SPECTRUM ESTIMATION 1) School of Earth Sciences and Engineering, Hohai University, Nanjing 210098 2) Department of Environment and Planning, Shangqiu Normal University, Shangqiu 476000 Received: 2013-08-23  Revised: null  Online: 2014-04-21 Supporting info