ZY-3 Block adjustment supported by glas laser altimetry data

2016 ◽  
Vol 31 (153) ◽  
pp. 88-107 ◽  
Author(s):  
Guoyuan Li ◽  
Xinming Tang ◽  
Xiaoming Gao ◽  
Huabin Wang ◽  
Yu Wang
Keyword(s):  
Altimetry Data ◽  
Laser Altimetry

scholarly journals Combined Block Adjustment for Optical Satellite Stereo Imagery Assisted by Spaceborne SAR and Laser Altimetry Data

2021 ◽  
Vol 13 (16) ◽  
pp. 3062
Author(s):  
Guo Zhang ◽  
Boyang Jiang ◽  
Taoyang Wang ◽  
Yuanxin Ye ◽  
Xin Li
Keyword(s):  
Large Scale ◽  
Satellite Image ◽  
Field Measurements ◽  
High Elevation ◽  
Global Scale ◽  
Stereo Image ◽  
Image Process ◽  
Control Points ◽  
Altimetry Data ◽  
Laser Altimetry

To ensure the accuracy of large-scale optical stereo image bundle block adjustment, it is necessary to provide well-distributed ground control points (GCPs) with high accuracy. However, it is difficult to acquire control points through field measurements outside the country. Considering the high planimetric accuracy of spaceborne synthetic aperture radar (SAR) images and the high elevation accuracy of satellite-based laser altimetry data, this paper proposes an adjustment method that combines both as control sources, which can be independent from GCPs. Firstly, the SAR digital orthophoto map (DOM)-based planar control points (PCPs) acquisition is realized by multimodal matching, then the laser altimetry data are filtered to obtain laser altimetry points (LAPs), and finally the optical stereo images’ combined adjustment is conducted. The experimental results of Ziyuan-3 (ZY-3) images prove that this method can achieve an accuracy of 7 m in plane and 3 m in elevation after adjustment without relying on GCPs, which lays the technical foundation for a global-scale satellite image process.

scholarly journals POINTING ANGLE CALIBRATION OF ZY3-02 SATELLITE LASER ALTIMETER USING TERRAIN MATCHING

2017 ◽  
Vol XLII-1/W1 ◽  
pp. 205-210 ◽  
Author(s):  
G. Li ◽  
X. Tang ◽  
X. Gao ◽  
J. P. Huang ◽  
J. Chen ◽  
...  
Keyword(s):  
Altimetry Data ◽  
Laser Altimetry ◽  
Angle Error ◽  
Laser Altimeter ◽  
Geometric Calibration ◽  
Pointing Error ◽  
The Public ◽  
Ice Cloud ◽  
Laser Data ◽  
Terrain Matching

After GLAS (Geo-science Laser Altimeter System) loaded on the ICESat (Ice Cloud and land Elevation Satellite), satellite laser altimeter attracts more and more attention. ZY3-02 equipped with the Chinese first satellite laser altimeter has been successfully launched on 30<sup>th</sup> May, 2016. The geometric calibration is an important step for the laser data processing and application. The method to calculate the laser pointing angle error based on existed reference terrain data is proposed in this paper. The public version terrain data, such as 90m-SRTM and 30m-AW3D30, can be used to estimate the pointing angle of laser altimeter. The GLAS data with simulated pointing error and actual ZY3-02 laser altimetry data is experimented to validate the algorithm. The conclusion will be useful for the future domestic satellite laser altimeter.

Supplementary material to "Assessment of NASA airborne laser altimetry data using groundbased GPS data near Summit Station, Greenland"

2016 ◽  
Author(s):  
Kelly M. Brunt ◽  
Robert L. Hawley ◽  
Eric R. Lutz ◽  
Michael Studinger ◽  
John G. Sonntag ◽  
...  
Keyword(s):  
Gps Data ◽  
Altimetry Data ◽  
Laser Altimetry ◽  
Airborne Laser ◽  
Supplementary Material

scholarly journals FUSION OF LASER ALTIMETRY DATA WITH DEMS DERIVED FROM STEREO IMAGING SYSTEMS

2016 ◽  
Vol XLI-B8 ◽  
pp. 531-536
Author(s):  
T. Schenk ◽  
B. M. Csatho ◽  
K. Duncan
Keyword(s):  
Time Series ◽  
Ice Sheet ◽  
Surface Shape ◽  
Imaging Systems ◽  
Surface Elevation ◽  
Altimetry Data ◽  
Laser Altimetry ◽  
Point Distribution ◽  
Spatial Coverage ◽  
Elevation Changes

During the last two decades surface elevation data have been gathered over the Greenland Ice Sheet (GrIS) from a variety of different sensors including spaceborne and airborne laser altimetry, such as NASA’s Ice Cloud and land Elevation Satellite (ICESat), Airborne Topographic Mapper (ATM) and Laser Vegetation Imaging Sensor (LVIS), as well as from stereo satellite imaging systems, most notably from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Worldview. The spatio-temporal resolution, the accuracy, and the spatial coverage of all these data differ widely. For example, laser altimetry systems are much more accurate than DEMs derived by correlation from imaging systems. On the other hand, DEMs usually have a superior spatial resolution and extended spatial coverage. We present in this paper an overview of the SERAC (Surface Elevation Reconstruction And Change detection) system, designed to cope with the data complexity and the computation of elevation change histories. SERAC simultaneously determines the ice sheet surface shape and the time-series of elevation changes for surface patches whose size depends on the ruggedness of the surface and the point distribution of the sensors involved. By incorporating different sensors, SERAC is a true fusion system that generates the best plausible result (time series of elevation changes) a result that is better than the sum of its individual parts. We follow this up with an example of the Helmheim gacier, involving ICESat, ATM and LVIS laser altimetry data, together with ASTER DEMs.

ICEComb − A New Software Tool for Satellite Laser Altimetry Data Processing and Visualisation

2021 ◽  
Author(s):  
Bruno Silva ◽  
Luiz Guerreiro Lopes ◽  
Pedro Campos
Keyword(s):  
Software Tool ◽  
Large Data ◽  
Congo Basin ◽  
Altimetry Data ◽  
Laser Altimetry ◽  
Software Environment ◽  
Design Data ◽  
Web Based ◽  
Data Products ◽  
Satellite Missions

&lt;p&gt;Processing, handling and visualising the large data volume produced by satellite altimetry missions is a challenging task. A reference tool for the visualisation of satellite laser altimetry data is the OpenAltimetry platform, a tool that provides altimetry-specific data from the Ice, Cloud, and land Elevation Satellite (ICESat) and ICESat-2 satellite missions through a web-based interactive interface. However, by focusing only on altimetry data, that tool leaves out access to many other equally important information existing in the data products from both missions.&lt;/p&gt;&lt;p&gt;The main objective of the work reported here was the development of a new web-based tool, called ICEComb, that offers end users the ability to access all the available data from both satellite missions, visualise and interact with them on a geographic map, store the data records locally, and process and explore data in an efficient, detailed and meaningful way, thus providing an easy-to-use software environment for satellite laser altimetry data analysis and interpretation.&lt;/p&gt;&lt;p&gt;The proposed tool is intended to be mainly used by researchers and scientists to aid their work using ICESat and ICESat-2 data, offering users a ready-to-use system to rapidly access the raw collected data in a visually engaging way, without the need to have prior understanding of the format, structure and parameters of the data products. In addition, the architecture of the ICEComb tool was developed with possible future expansion in mind, for which well-documented and standard languages were used in its implementation. This allows, e.g., to extend its applicability to data from other satellite laser altimetry missions and integrate models that can be coupled with ICESat and ICESat-2 data, thus expanding and enriching the context of studies carried out with such data.&lt;/p&gt;&lt;p&gt;The use of the ICEComb tool is illustrated and demonstrated by its application to ICESat/GLAS measurements over Lake Mai-Ndombe, a large and shallow freshwater lake located within the Ngiri-Tumba-Maindombe area, one of the largest Ramsar wetlands of international importance, situated in the Cuvette Centrale region of the Congo Basin.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Keywords:&lt;/strong&gt; Laser altimetry, ICESat/GLAS, software tool design, data visualization, Congo Basin.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Acknowledgement.&lt;/strong&gt; This work was partially supported by the Portuguese Foundation for Science and Technology (FCT) through LARSyS &amp;#8722; FCT Pluriannual funding 2020&amp;#8722;2023.&lt;/p&gt;

scholarly journals Analysis of water level variation of lakes and reservoirs in Xinjiang, China using ICESat laser altimetry data (2003–2009)

PLoS ONE ◽  
2017 ◽  
Vol 12 (9) ◽  
pp. e0183800 ◽  
Author(s):  
Zhaoxia Ye ◽  
Hongxing Liu ◽  
Yaning Chen ◽  
Song Shu ◽  
Qiusheng Wu ◽  
...  
Keyword(s):  
Water Level ◽  
Altimetry Data ◽  
Level Variation ◽  
Laser Altimetry ◽  
Water Level Variation ◽  
Lakes And Reservoirs

The Efficient Applicability of Highway Alignment Optimization Models

2012 ◽  
Vol 209-211 ◽  
pp. 818-821
Author(s):  
Xiao Yu Sun ◽  
Zhen Qing Wang ◽  
Hong Tao Xing ◽  
Yong Heng Tong
Keyword(s):  
Large Scale ◽  
Engineering Geology ◽  
Low Cost ◽  
Laser Scanner ◽  
Site Investigation ◽  
Pilot Project ◽  
Altimetry Data ◽  
Laser Altimetry ◽  
Highway Alignment Optimization ◽  
Highway Alignment

The total engineering geology approach is applied to a roadway pilot project in the tidal deposits of the Western Netherlands.Its benefit as compared to the conventional geotechnical site investigation is demonstrated.Combining laser scanner altimetry data that is readily available to low cost GEM-2 electromagnetic surveys, allows for the refinement of the local geological model. Small and large scale heterogeneities have been detected in this study. Their existence has been confirmed by a line of closely spaced CPTs. On the basis of laser altimetry and GEM-2 signature, the identified heterogeneities are classified. Only a limited set of heterogeneities representative of the different classes requires a further detailed investigation. Aspects of feasibility, accuracy, and cost-effectiveness have a need for further research.

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