全球定位系统
全毬定位繫統
전구정위계통
GPS WORLD OF CHINA
2013年
5期
53-55,82
,共4页
阶跃%参考框架点%QOCA%GNSS数据处理
階躍%參攷框架點%QOCA%GNSS數據處理
계약%삼고광가점%QOCA%GNSS수거처리
Step offset%frame station%QOCA%GNSS data processing
近年来，由于仪器更换和强震影响，一些长期稳定的GNSS连续站出现了阶跃，严重地影响了参考框架的稳定性和解算精度，理论上这些测站不能再选为参考框架点。针对GNSS连续站阶跃修复及其对数据处理的影响进行了分析，结果表明：1）如果选用未修复阶跃的测站为框架点，将会扭曲解算结果；2） QOCA 能够较为便捷地修复测站阶跃；3）修复测站阶跃能够保证参考框架点的稳定性，并能一定程度提高解算精度。
近年來，由于儀器更換和彊震影響，一些長期穩定的GNSS連續站齣現瞭階躍，嚴重地影響瞭參攷框架的穩定性和解算精度，理論上這些測站不能再選為參攷框架點。針對GNSS連續站階躍脩複及其對數據處理的影響進行瞭分析，結果錶明：1）如果選用未脩複階躍的測站為框架點，將會扭麯解算結果；2） QOCA 能夠較為便捷地脩複測站階躍；3）脩複測站階躍能夠保證參攷框架點的穩定性，併能一定程度提高解算精度。
근년래，유우의기경환화강진영향，일사장기은정적GNSS련속참출현료계약，엄중지영향료삼고광가적은정성화해산정도，이론상저사측참불능재선위삼고광가점。침대GNSS련속참계약수복급기대수거처리적영향진행료분석，결과표명：1）여과선용미수복계약적측참위광가점，장회뉴곡해산결과；2） QOCA 능구교위편첩지수복측참계약；3）수복측참계약능구보증삼고광가점적은정성，병능일정정도제고해산정도。
There are some step offsets in the time series of GNSS continuous stations due to instrument replacement and strong earthquake’s effect in recent years .Those stations can’t be chosen as frame stations in theory and it seriously influenced the stability of refer-ence frame and calculation accuracy .In this paper ,step offset recovery of GNSS continuous station and its effect on GNSS data processing were analyzed and the results show that :1) if the offset of stations were not recovered and were chosen as frame stations ,the result would be distorted ;2) the offset can be recovered conveniently in QOCA ;3) step offset recovery of GNSS continuous station can maintain the stability of reference frame and improve the calcu-lation precision in some degree .
