Publication Date:
2020-10-13
Description:
This paper presents the results of a blind experiment
that is performed using two pairs of dihedral reflectors. The
aim of the experiment was to demonstrate that interferometric
synthetic aperture radar (InSAR) measurements can indeed allow
a displacement time series estimation with submillimeter accuracy
(both in horizontal and vertical directions), provided that the
data are properly processed and the impact of in situ as well as
atmospheric effects is minimized. One pair of dihedral reflectors
was moved a few millimeters between SAR acquisitions, in the
vertical and east–west (EW) directions, and the ground truth was
compared with the InSAR data. The experiment was designed to
allow a multiplatform and multigeometry analysis, i.e., each re-
flector was carefully pointed in order to be visible in both Envisat
and Radarsat acquisitions. Moreover, two pairs of reflectors were
used to allow the combination of data gathered along ascending
and descending orbits. The standard deviation of the error is 0.75
mm in the vertical direction and 0.58 mm in the horizontal (EW)
direction. GPS data were also collected during this experiment in
order to cross-check the SAR results.
Description:
Published
Description:
1142-1153
Description:
5IT. Osservazioni satellitari
Description:
JCR Journal
Keywords:
Artificial reflector
;
global positioning system (GPS)
;
InSAR
;
permanent scatter (PS)
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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