In: Wagner W., Szekely. B. (eds.): ISPRS TC VII Symposium - 100 Years ISPRS, Vienna, Austria, July 5-7, 2010, IAPRS, Vol. XXXVIII, Part 7B 
Figure 1. Metropolitan area of Barcelona: SAR amplitude superimposed over Google Earth. The area covers 45 by 45 km approx. 
2. THE BARCELONA DATASET 
The VHR X-band SAR dataset analysed in this paper is 
composed of 28 StripMap images acquired by the sensor 
onboard the satellite TerraSAR-X. This dataset is an 
interferometric stack of images covering the same area, i.e. they 
are suitable to perform a PSI analysis. The spatial coverage of 
the images is shown in Figure 1, while their temporal 
distribution, which starts in December 2007 and ends in 
November 2009, can be found in Table 1. Six of the 28 images 
were acquired for the Project №. LAN0634, “Evaluation of 
DEM derived from TerraSAR-X data”, of the TerraSAR-X 
Science Service Program. Some preliminary results of a subset 
of 13 SAR images are described in Crosetto et al. (2010).The 
images used in this work cover approximately 30 by 50 km, 
with a pixel footprint of about 1.9 by 1.6 m. The images were 
acquired with an off-nadir angle of 35.5°. The perpendicular 
baselines of the interferograms based on these images (i.e. the 
component of the vector that connects the two satellite positions 
during image acquisition, measured in the direction 
perpendicular to the SAR line-of-sight) are approximately in the 
range of -275 m to 500 m. 
In the next sections, the following aspects are analysed: (i) the 
spatial sampling, (ii) the so-called residual topographic error 
and the PSI geocoding and (iii) the average displacement rates 
and the deformation time series. 
Acquisition dates 
20071230 
20080908 
20080110 
20081102 
20080121 
20081216 
20080212 
20090118 
20080223 
20090129 
20080305 
20090220 
20080316 
20090314 
20080429 
20090416 
20080521 
20090530 
20080612 
20090713 
20080623 
20090815 
20080704 
20090917 
20080715 
20091020 
20080817 
20091122 
Table 1. Temporal distribution of the 28 images considered in 
this study The temporal coverage is approximately two years: 
from December 2007 to November 2009.