摘要
城市地面的不均匀沉降或三线形变是一种对大城市危害极大的环境灾害,文中进一步探讨应用GPS卫星定位技术监测这种三线形变的可抒性和有关问题.讨论GPS分期监测的数据处理的理论和方法,论证所采用的平差模型和基准方程的合理性,并说明基准方税的几何意义.通过对一个GPS形交监测试验网的计算,说明文中所采用的平差模型能够较好地解决不同期观测的尺度和方位偏差问题,GPS监测的平面精度可达2~3mm,高程精度可达5mm左右.
Based on the fundamental of extended rank defect adjustment, theauthors presented data processing theory and methodology of GPS monitoringnetworks. The reasonableness of adjustment models and datum equations usedwere also proved. Through the calculation and analysis of a smallscale GPSmonitoring test network, the authors meant to illustrate that the adjustmentmodel could be used to solve the problems about scale and orientetion deviation inthe different observation phases. The horizontal precision could reach 2~3mm, andvertical precision was about 5mm. All the results proved that GPS could be used inmetropolis 3D deformation monitoring.
出处
《同济大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
1997年第2期176-181,共6页
Journal of Tongji University:Natural Science
基金
国家自然科学基金!493710491
关键词
GPS监测网
三维形变
基准方程
平差模型
GPS monitoring test network
3D deformation
Datum equations
Adjustment models