????GPS?????????????????

??????????????????TIKHONOV??????????GPS?????????????????????????????????ε??????????о????????????????????????????????????????????????????????????????????????????????????У?????????з??????Eviews???????????????е????????????????????????ó??????1?????????????????????С??1 mm???????????????????????????????е???????????2????????????????5 mm?????????????????????3???????????X????Y??????н???????????????????????????????????????????????????·??Ч???4???????????Z???????????????????·????Z??????С??

STATISTIC ANALYSIS ON GPS BASELINE ESTIMATED BY RAPID ALGORITHM

The rapid GPS baseline determination principle based improved TIKHONON regularization method using GPS single epoch observations is discussed, a baseline data was observed at same session in adjacent two days is computed using two kinds algorithm, single epoch algorithm and static algorithm. The static result is recognized as most probability value, the differences between single epoch value and most probability value are calculated, which created time series of baseline vector offsets, whose distribution is tested, whose cross correlation and auto correlation are determined using the time series analyses software Eviews. The conclusions are derived that 1) Offsets are distributed normally, whose means are smaller than 1mm, which suggest that no notable system error existed, or system error is balanced in time series; 2)The standard deviation is smaller than ±5 mm, which suggest that single epoch result precision is good; 3)The cross correlations of X offsets series and Y offsets series are obvious,namely those repeatability is good, which suggest there is multipath error in X or Y offset series; 4) The cross correlation of Z offsets series is unconspicuous ,which suggest that the effect of multipath on Z offset is small.