天绘一号03星定位精度初步评估

王任享; 王建荣; 胡莘

doi:10.11947/j.AGCS.2016.20160373

测绘学报 >

2016 , Vol. 45 >Issue 10: 1135 - 1139

DOI: https://doi.org/10.11947/j.AGCS.2016.20160373

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天绘一号03星定位精度初步评估

王任享 ,
王建荣 ,
胡莘

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1. 地理信息工程国家重点实验室, 陕西西安 710054;
2. 西安测绘研究所, 陕西西安 710054

王任享(1933-),男,研究员,中国工程院院士,从事卫星摄影测量的理论和应用研究。

收稿日期: 2016-07-25

修回日期: 2016-09-05

网络出版日期: 2016-11-08

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Preliminary Location Accuracy Assessments of 3rd Satellite of TH-1

WANG Renxiang ,
WANG Jianrong ,
HU Xin

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1. State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China;
2. Xi'an Institute of Surveying and Mapping, Xi'an 710054, China

Received date: 2016-07-25

Revised date: 2016-09-05

Online published: 2016-11-08

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摘要

天绘一号卫星是我国第一颗传输型立体测绘卫星，主要用于无地面控制点条件下高精度定位及1∶5万比例尺地形图测绘。01、02星分别于2010年8月24日及2012年5月6日成功发射，03星于2015年11月26日发射，目前3颗星在轨正常运行。01星定位精度经过系统检测后，定位精度为10.3 m/5.7 m（平面/高程），02星定位精度与01星精度相当。本文首先简要介绍了天绘一号卫星的总体概况及其地面处理系统中的关键技术，重点对03星的无控定位精度进行初步试验评估。通过国内外3条航线的试验发现，03星较02星精度有较大提高，在无地面控制点条件下可实现平面7.2 m、高程2.6 m的定位精度。

关键词： 卫星摄影测量; 相机参数标定; 光束法平差; 定位精度; 全球连续覆盖

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王任享 , 王建荣 , 胡莘 . 天绘一号03星定位精度初步评估[J]. 测绘学报, 2016 , 45(10) : 1135 -1139 . DOI: 10.11947/j.AGCS.2016.20160373

Abstract

The TH-1 satellite is the first stereo mapping transmission satellite in China, and the primary mission goal of the satellite is for topographic mapping at 1:50 000 scale and high-accuracy location without Ground Control Points (GCPs). 1^st, 2^nd satellites of TH-1 were launched on August 24, 2010, May 6, 2012, and 3^rd satellite was launched on October 26, 2015. Now, three satellites of TH-1 are well operating on its orbit. After evaluation, the location accuracy of 1^st satellite without GCPs is 10.3 m/5.7 m (horizontal accuracy/vertical elevation accuracy), and the location accuracy of 2^nd is equivalent with 1^st satellite. In this paper, the system overview of TH-1 and the key technical in ground image processing are introduced. Then, the preliminary location accuracy of 3^rd is assessed. The results are shown using three routes images:the location accuracy of 3^rd is higher than 2^nd, and can realize high accuracy location without GCPs, in which the horizontal accuracy is 7.2 m, and the vertical elevation accuracy is 2.6 m.

Key words： satellite photogrammetry; camera parameters calibration; bundle adjustment; location accuracy; global coverage on a continuous basis

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