Chen Yongqi, Adam Chrzanowski. A Method to Assess Levelling Measurements[J]. Geomatics and Information Science of Wuhan University, 1986, 11(1): 1-9.
Citation: Chen Yongqi, Adam Chrzanowski. A Method to Assess Levelling Measurements[J]. Geomatics and Information Science of Wuhan University, 1986, 11(1): 1-9.

A Method to Assess Levelling Measurements

More Information
  • Received Date: June 30, 1985
  • Published Date: January 04, 1986
  • The determination of observation weights and error models in levelling networks is a current problem. The method of Minimum Norm Quadratic Estimation (MINQE) is proposed for the determination of the error model. Different possible models of error structure of levelling measurements are estimated from the adjustment of a network or from the forward-backard discrepancies of levelling lines using the iterated MINQE. An appropriate model of error structure can be obtained after comparing the estimated parameters in the models with their standard deviations. As an example, a first-order levelling network has been analysed. The results demonstrate the usefulness of the method.
  • Related Articles

    [1]ZHANG Yonggang, WANG Zhengtao, GAO Yu, TIAN Kunjun. Estimation of GRACE Groundwater Storage Components Using Wavelet Decomposition[J]. Geomatics and Information Science of Wuhan University, 2025, 50(1): 20-29. DOI: 10.13203/j.whugis20220407
    [2]QU Wei, CHEN Peinan, ZHANG Pufang, TANG Xingyou, LI Jiuyuan. Spatiotemporal Changes of GWS Changes and Their Sustainability in the Upper Reaches of the Yellow River Basin from 2002 to 2022 Revealed by GRACE/GRACE-FO Observations[J]. Geomatics and Information Science of Wuhan University, 2024, 49(8): 1287-1299. DOI: 10.13203/j.whugis20240061
    [3]WANG Zemin, ZHANG Baojun, JIANG Weiping, CHE Guowei. Ocean Mass Variations in the South China Sea Inferred from Satellite Altimetry, GRACE, Oceanographic and Meteorological Data[J]. Geomatics and Information Science of Wuhan University, 2018, 43(4): 571-577, 636. DOI: 10.13203/j.whugis20150691
    [4]WANG Xingxing, LI Fei, HAO Weifeng, ZHANG Shengkai, YANG Yuande. Comparison of Several Filters in the Rates of Antarctic Ice Sheet Mass Change Based on GRACE RL05 Data[J]. Geomatics and Information Science of Wuhan University, 2016, 41(11): 1450-1457. DOI: 10.13203/j.whugis20140611
    [5]ZHANG Shoujian, LI Jiancheng, ZOU Xiancai. Analysis of the Cross-talk Systematic Error in GPS Observation of GRACE Satellite and Its Impact on POD Results[J]. Geomatics and Information Science of Wuhan University, 2010, 35(11): 1331-1334.
    [6]ZHANG Shoujian, LI Jiancheng, ZOU Xiancai, JIN Taoyong. Analysis of Zero-Difference Kinematic POD for GRACE[J]. Geomatics and Information Science of Wuhan University, 2010, 35(6): 679-682.
    [7]ZHU Guangbin, LI Jiancheng, WEN Hanjiang, WANG Zhengtao. Investigation on the Mass Variations of Ice Sheet in Antarctic with GRACE Time-variable Gravity Models[J]. Geomatics and Information Science of Wuhan University, 2009, 34(10): 1185-1189.
    [8]XING Lelin, LI Jiancheng, LI Hui, SUN Wenke. Detection of Co-seismic and Post-seismic Deformation Caused by the Sumatra-Andaman Earthquake Using GRACE[J]. Geomatics and Information Science of Wuhan University, 2009, 34(9): 1080-1084.
    [9]YANG Yuande, E Dongchen, CHAO Dingbo. The Inversion of Ice Mass Change in Greenland Ice Sheet Using GRACE Data[J]. Geomatics and Information Science of Wuhan University, 2009, 34(8): 961-964.
    [10]ZHAI Ning, WANG Zemin, WU Yue, YE Congyun. Recovery of Yangtze River Basin Water Storage Variations by GRACE Observations[J]. Geomatics and Information Science of Wuhan University, 2009, 34(4): 436-439.

Catalog

    Article views (713) PDF downloads (173) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return