CAJ | 학술논문

卫星重力探测技术为监测陆地水储量变化提供了新的技术手段。对利用GRACE卫星Level-1B数据反演地球陆地水储量变化的重力位差法和M ascon方法的数学模型作了详细推导分析，总结两种方法的特点和解算处理步骤。推导过程表明：重力位差法和Mascon方法在反演时只采用卫星飞临研究区域上空时的观测数据，能够提高反演结果的空间分辨率，比传统的球谐系数法更具优势；M ascon方法在解算时还引入了时空约束方程，进一步提高了反演结果的时空分辨率。
위성중력탐측기술위감측륙지수저량변화제공료신적기술수단。대이용GRACE위성Level-1B수거반연지구륙지수저량변화적중력위차법화M ascon방법적수학모형작료상세추도분석，총결량충방법적특점화해산처리보취。추도과정표명：중력위차법화Mascon방법재반연시지채용위성비림연구구역상공시적관측수거，능구제고반연결과적공간분변솔，비전통적구해계수법경구우세；M ascon방법재해산시환인입료시공약속방정，진일보제고료반연결과적시공분변솔。
Technology of satellite gravimetry provides a new technical means for monitoring continental water storage variation .Mathematical models of Mascon and situ geopotential using GRACE Level-1B data for recovering continental water storage variation are deduced detailedly .The characteristic and processing steps of the two methods are summarized .It is showed that methods of Mascon and situ geopotential can promote the spatial resolution of result and have more advantages than the method of spheric harmonic coefficient because of using range rate observations only w hen satellites flying over study area .Constraint equation is introduced into Mascon method processing ,and further promotes the spatial and temporal resolution .