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.