【摘要】 可控震源勘探中,通过对GPS/GLONASS双星结算差分模式的优势选择,可大大提高地震作业的效率。使用不合适的GPS差分模式,丛林对GPS差分信号的遮挡会严重制约生产效率。本文对单点定位、SBAS广域差分、DGPS伪距差分、RTK载波相位差分模式的精度进行了试验分析,目前所采用的双星解算GPS改写了以前GPS单系统的坐标精度及收星颗数。根据不同差分模式的优缺点,选择最合适的GPS差分模式,可以满足甲方的需求并保证高效的地震采集。本文阐述了各种GPS差分信号的原理、不同差分模式的优缺点以及针对不同甲方需求和工区地形条件的要求如何选取合适的GPS差分模式,可作为今后可控震源施工差分模式选择的参考。更多还原

【Abstract】 Thanks to the advantage selection of GPS/GLONASS double satellite receiver differential model,the efficiency of seismic operation is increased in vibroseis acquisition.The block of GPS differential signal is severe because of the jungle,so inappropriate GPS differential model will cause lower producing efficiency.In this paper we conducted an experiment to analyze the precision of single-stand GPS positioning model,SBAS wide area differential model,DGPS pseudo range differential model,and Real Time Kinematic differential model.Now using GPS/GLONASS double satellite receiver differential model improved the precision and searched satellite number.Choosing the most proper GPS differential model can satisfy the different client’s request and ensure the high performance in seismic acquisition based on considering the advantage and disadvantage of various differential models.This paper introduced the principle of various GPS differential models,analyzed the advantage of these different models,and explained how to choose the proper GPS differential model to satisfy the client’s request and fit the terrain condition.This GPS differential models’ analysis can be the reference for future vibroseis acquisition.更多还原