Mr. Wei Zhong Profile

Wei Zhong

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 22 October 2010 Paper

Time information extraction of return signal for laser altimeter over ladder terrain

Wei Zhong, Xu Feng, Guohui Wu, Hui Zhou

Proceedings Volume 7658, 76581B (2010) https://doi.org/10.1117/12.864173

KEYWORDS: Reflectivity, Optical simulations, Buildings, 3D modeling, Receivers, Data modeling, Pulsed laser operation, Reflection, Superposition, Device simulation

Read Abstract +

Laser altimetry is a new measurement technique. Altimeter receives the return signals after launching laser pulses to the ground. Three-dimensional information on the ground is obtained by analyzing the corresponding relationship between return signal features and topographical features. But there is an apparent deficiency when using the data points to establish the three-dimensional DSM. That is the accurate time information of the return signal cannot be obtained when positioning the edge lines of the ladder terrain. In this article, the distribution of the echo waveform over the ladder terrain of city buildings is simulated by a self-designed altimeter waveform simulator under different direction angles and parameters of the terrain. The best extraction method of the return time information at the edge line is identified by analyzing the waveform characteristics at the edge line of this terrain, which enhances the accuracy of applications of the ladder terrain modeling. The time information of the return signal is extracted under various parameters by applying five methods which are accepted internationally, namely Peak point, Mean point, 50% Rise time point, Center of Area point, and Midpoint. Then the experiment values are compared to the actual values. According to the results of the simulations, the difference between the experiment value of the 50% Rise time point and the actual value is minimal. Its resolution ratio is about ten time units maintaining in a narrow range. It proves that this method can effectively improve the accuracy of the extracted time information of the return signal at the edge line over ladder terrain. And it provides a valid data source for establishing a more accurate DSM model.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years