[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
Main Menu
Home::
Journal Information::
Articles archive::
For Authors::
For Reviewers::
Registration::
Contact us::
Site Facilities::
::
Search in website

Advanced Search
..
Receive site information
Enter your Email in the following box to receive the site news and information.
..
:: Volume 8, Issue 2 (9-2020) ::
jgit 2020, 8(2): 21-38 Back to browse issues page
Sensitivity Analysis of Brown Model Waveform in Radar Altimetry
Reza Arabsahebi * , Behzad voosoghi , Mohammad-Javad Tourian
K.N. Toosi University of Technology
Abstract:   (2864 Views)
 In satellite altimetry (radar altimetry), the altimeter emits a pulse, with known power, to the earth surface and receives it back continuously to determine of the sea surface height. The time series of the mean returned power is recorded individually at satellite as the so-called waveform. Analytical model for the waveform is first introduced by Brown, which consists of six parameters: significant wave height, epoch, skewness of surface, off-nadir angle, thermal noise and backscatter coefficient. The midpoint of the waveform has the main role in determining the distance between sensor and water surface (range). Then, assessing sensitivity of the model to these parameters plays an important role in determining reliability of the range parameter. In this study, the received waveform sensitivity analysis to the mentioned parameters is done for simulated waveform of JASON-2 radar altimetry mission. Then, in order to demonstrate effect of the parameters in observed JASON-2 data, 22 points are chosen over Persian Gulf and Oman Sea from cycle 208 and sensitivity analysis is performed using these points. Our results indicate that the mid-point of the waveform shape is less affected by significant wave height, skewness of surface and off-nadir angle but epoch of half height affects mid-point position significantly, which results in inaccurate range calculation. Because the process of determining the waveform components is a repetitive process, we discuss the choice of initial values of the parameters for using the least squares estimation.
Keywords: Radar altimetry, sensitive analysis, waveform, Brown model, least square method
Full-Text [PDF 2146 kb]   (1049 Downloads)    
Type of Study: Research | Subject: Geodesy
Received: 2017/03/6 | Accepted: 2018/08/27 | Published: 2020/09/21
Send email to the article author



XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Arabsahebi R, voosoghi B, Tourian M. Sensitivity Analysis of Brown Model Waveform in Radar Altimetry. jgit 2020; 8 (2) :21-38
URL: http://jgit.kntu.ac.ir/article-1-794-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 8, Issue 2 (9-2020) Back to browse issues page
نشریه علمی-پژوهشی مهندسی فناوری اطلاعات مکانی Engineering Journal of Geospatial Information Technology
Persian site map - English site map - Created in 0.04 seconds with 36 queries by YEKTAWEB 4660