基于SINS/DGPS的捷联式航空重力矢量测量

国防科学技术大学研制成功了我国首套具有自主知识产权的捷联式航空重力测量系统SGA-WZ01。该重力测量系统由捷联式惯性导航系统(SINS)和差分全球定位系统(DGPS)组成。2012年4~5月,在南海某海域进行了飞行试验以测试这一新型重力仪的精度。描述了该系统的构成和数据处理过程,在数据处理中应用了全球重力场模型对重力测量结果进行校正。试验结果表明,该系统不仅可用于重力标量测量,还可用于矢量测量。重复测线的数据表明了该系统测得的重力异常的重复性可达到1.5m Gal,经过全球重力场模型校正之后北向分量的重复性为7.46m Gal,东向分量的重复性为4.46m Gal。

Airborne Vector Gravimetry Based on SINS / DGPS

National University of Defense Technology has developed an airborne gravitmetry system named SGA-WZ0 1.based on SINS / DGPS,the first system in which a strap-down inertial navigation system (SINS) is usedfor airborne gravimetry in China.The gravity system consists of a strap-down inertial navigation system and adifferential global positioning system (DGPS).In April 2012,a flight test was carried out to test the accuracy ofthe new type airborne gravimetry system.The system structure and the data processing are mentioned,and theresults show that SGA-WZ0 1.can obtain not only the gravity anomaly but also the horizontal components of thegravity.Gravity results in this test from repeated flight lines show that the repeatability of the gravity anomaly is1.5.mGal.After corrected by global gravitation model,the repeatability of the north component can reach 7.4 6.mGal and the repeatability of the east component can reach 4.4 6.mGal.