测绘与空间地理信息
測繪與空間地理信息
측회여공간지리신식
GEOMATICS & SPATIAL INFORMATION TECHNOLOGY
2015年
7期
21-23
,共3页
GPS高程传递%EGM2008重力场模型%椭球高约束%高程异常
GPS高程傳遞%EGM2008重力場模型%橢毬高約束%高程異常
GPS고정전체%EGM2008중력장모형%타구고약속%고정이상
GPS height transference%EGM2008 gravity field model%ellipsoidal height restrict%height anomaly
针对EGM2008重力场模型辅助跨障碍GPS高程传递控制网布设方案进行研究，分别对GPS高程传递控制网进行不同点数的椭球高约束计算，将传递高程与实测高程进行比较，结果表明：跨越2～3 km的障碍GPS高程传递的精度能够达到0．010 m，GPS高程传递控制网中以约束一点椭球高为宜，增加椭球高约束个数并不能提高高程传递的精度。
針對EGM2008重力場模型輔助跨障礙GPS高程傳遞控製網佈設方案進行研究，分彆對GPS高程傳遞控製網進行不同點數的橢毬高約束計算，將傳遞高程與實測高程進行比較，結果錶明：跨越2～3 km的障礙GPS高程傳遞的精度能夠達到0．010 m，GPS高程傳遞控製網中以約束一點橢毬高為宜，增加橢毬高約束箇數併不能提高高程傳遞的精度。
침대EGM2008중력장모형보조과장애GPS고정전체공제망포설방안진행연구，분별대GPS고정전체공제망진행불동점수적타구고약속계산，장전체고정여실측고정진행비교，결과표명：과월2～3 km적장애GPS고정전체적정도능구체도0．010 m，GPS고정전체공제망중이약속일점타구고위의，증가타구고약속개수병불능제고고정전체적정도。
This paper mainly research the layout scheme of across obstacle GPS height transference control -net using EGM2008 grav-ity field model.The different ellipsoidal heights were restricted during GPS height transference control -net and the GPS transference heights was computed .The GPS transference heights were compared with leveling heights .The results show that the precision of GPS transference heights are 0.010m to across 2-3 km obstacle.The one ellipsoidal height restrict is befitting during GPS height transfer-ence control-net was computed .More ellipsoidal heights restrict can not enhance the precision of GPS transference heights .
