Quantitative analysis of relative geolocation accuracy of the TerraSAR-X enhanced ellipsoid corrected product

Takashi Nonaka; Tomohito Asaka; Keishi Iwashita; Wen Liu; Fumio Yamazaki; Tadashi Sasagawa

doi:10.1117/1.JRS.11.044001

4 October 2017 Quantitative analysis of relative geolocation accuracy of the TerraSAR-X enhanced ellipsoid corrected product

Takashi Nonaka, Tomohito Asaka, Keishi Iwashita, Wen Liu, Fumio Yamazaki, Tadashi Sasagawa

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 11, Issue 4, 044001 (October 2017). https://doi.org/10.1117/1.JRS.11.044001

Abstract

High-resolution commercial synthetic aperture radar (SAR) satellites with resolutions of several meters have recently been used for effective disaster monitoring. One study reported the earthquake’s displacement using the pixel matching method with both pre- and postevent TerraSAR-X data, with a validated accuracy of ∼30 cm at global navigation satellite system (GNSS) Earth observation network (GEONET) reference points. However, it is insufficient to determine the accuracy using analysis of only a couple of data points per orbit. In addition, the errors were not reported because the number of data samples was too small to discuss the statistics. In order to better understand displacement accuracy, we analyzed displacement features using the pixel matching method to evaluate the relative geolocation accuracies of the TerraSAR-X product. First, we used fast Fourier transform oversampling 16 times to develop the pixel matching method for estimating the displacement at the subpixel level using the TerraSAR-X StripMap dataset. Second, we applied this methodology to 20 pairs of images from the Tokyo metropolitan area and calculated the displacement for each image pair. Third, we conducted spatial and temporal analyses in order to understand the displacement features. Finally, we evaluated the displacement accuracy by comparison with GEONET and solid earth tide data as a reference.

Citation Download Citation

Takashi Nonaka, Tomohito Asaka, Keishi Iwashita, Wen Liu, Fumio Yamazaki, and Tadashi Sasagawa "Quantitative analysis of relative geolocation accuracy of the TerraSAR-X enhanced ellipsoid corrected product," Journal of Applied Remote Sensing 11(4), 044001 (4 October 2017). https://doi.org/10.1117/1.JRS.11.044001

Received: 16 March 2017; Accepted: 6 September 2017; Published: 4 October 2017

ACCESS THE FULL ARTICLE

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