RemoteSensing Laboratory (RSLab) Radiation Laboratory (RadLab) 1/26 BISTATIC SAR TOMOGRAPHY: METHOD ANALYSIS BISTATIC SAR TOMOGRAPHY: METHOD ANALYSIS AND INDOOR EXPERIMENTAL RESULTS AND INDOOR EXPERIMENTAL RESULTS Sergi Duque*, Paco López-Dekker*, Jordi J. Mallorquí*, Adib Y. Nashashibi** and Amit M. Patel** [email protected]* Remote Sensing Lab (RSLab) - Universitat Politècnica de Catalunya (UPC) **Radiation Laboratory (RadLab) - University of Michigan (UofM)
BISTATIC SAR TOMOGRAPHY: METHOD ANALYSIS AND ...earth.esa.int/fringe09/participants/606/pres_606_Duque.pdfMUSIC order 1 and MUSIC order 3 and Non Least Squares (NLS). They use a priori
This is the outline of the presentation I ll start giving an introduction about mb and its impact on a bistatic configuration Ill continue descrigin the geometry and the system employed After that ill discuss the different tomographic processing techniques used in this work It will b followed by some results. Which will be obtained using regular and irregular baseline set And the results will also include a dif tomo res I ll end up with some conclusiong
(MB) SAR techniques have appeared as evolution of InSAR.
Their objective is to distinguish
between different
scatters
in the same resolution cell
and to retrieve their height.
The MB techniques have been applied using monostatic
geometries.
Drawbacks
of monostatic
MB techniques:
Temporal decorrelation
due to the time between the passes.
Irregular baseline sampling.
Presenter
Presentation Notes
MB has appeared as an evolution of InSAR Their obj is to distinguish betwn dif scatterers in the same res cell and to retrieve their height Until now, this tecniques have been aplied using monostatic geom. They can have some drawbacks such as temporal decorrelation because the time between the pases and irregular sampling
Freedom placing the receivers baseline sampling as desired.
Different algorithms will be tested.
Results
over a real controlled scenario
will be presented.
Presenter
Presentation Notes
Which is our goal? It is try to overcome the monostatic mb drawbacks How? Using a bistatic geo with a fixed receiver. With this kind of configuration only one pass is needed which means no temporal decorrelation. Besides, we will have some freedom placing the receivers. Here we will test different algorith and results over a controlled real scenario will b presented
GeomettryGeomettry and Acquisition System Description (and Acquisition System Description (RadLabRadLab))
R
≈
7 m
Bv
= 1 m
θ
= 50 º
X
Y
Z
Tx
Rx1
RxN
Bv
R
ΔBv
zi
Sources
Resolution Cell
f0
= 34.93 GHz (λ
≈
8.6 mm
)
Bw=2.5GHz
Positioning precision better than 0.1 mm
θ
Presenter
Presentation Notes
The acquisition system is presented on this pic on the right It has a carrier of about 35Ghz and bandwith of 2.5GHz Tx and Rx The sinthtic aperture is performed moving a robotic arm in a horizontal path and the differents baselines are done by the moving the other robotic arm in the vertical direction The geom parameters are the following R 7 m, total baseline vertical baseline 1m Incidence angle about 50º Inc and rang change along the scene Aplicar patrons Treure dades irrellevants Resaltar antenes enfront dades Afegir longitud d’ona
TomographicTomographic processingprocessing techniquestechniquesRaw data
Back Projection
Corregistration
Preparation for APES
processing
APES Processing
High resolutionSLC image
Presenter
Presentation Notes
Firstm we adquire the raw data, we perform a BP over it and we corregister all the images acquired from the different receiver positions. We wanna do an APES processing over the slc image obtained by BP. Thus, we have to prepare the data for it, equalizing the usefull spectra
MUSIC will have a good resolution if the number of sources is correct.
NLS will be timing consuming but it should present high resolution for regular and irregular baseline dataset.
7/26
3D (XYZ)Complex image
“Flat Earth”correction
Set of High resolutionSLC images
Tomographicprocessing
Geocodification
Presenter
Presentation Notes
Once we have all the images at a good resolution from all the receiver postiions, we proceed to the tomograpohic processing itself. The flat eart term is removed and then we can apply the tomographic processing. Fer la mida de les fórmules coherent amb el texte Falta decir los resultados esperados de los diferentes mètodos
BF will show low resolution. It presents high sidelobes
when an irregular baseline set is used.
CP is a good espectral
estimator able to retrieve the heights in a regular and irregular set of baselines.
CPs
is similar to CAPON but uses the Baseline dimension to calculate the covariance matrix. Because of this it cannot be applied to irregular set of baselines.
8/26
3D (XYZ)Complex image
“Flat Earth”correction
Set of High resolutionSLC images
Tomographicprocessing
Geocodification
Presenter
Presentation Notes
Fer la mida de les fórmules coherent amb el texte Falta decir los resultados esperados de los diferentes mètodos
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The expected displacement is a ramp from 5 to 0 mm.
Scheme:
Presenter
Presentation Notes
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
The RSLab is a bistatic configuration with a fixed receiver. We are using a fixed receiver bistatic conf A C-band receiver that uses ERS2 and ENVISAT as a transmitters of opportunity has been developed (SABRINA) The purpouse of SABRINA is to do differential interferometric applications Extraction of the 3D deformation component using a set of receivers with different looking angle. As u know the sar polarimetry and interferometry and differential interferometry are techniques that has been used in SAR for many years and they are mature techniques. However bistatic and multistatic systems are emerging as a new research field allowing more geometries and more configurations. And also the previous techniques mentioned before can be applied to bistatic config As u have seen in previous presentations, dfferent bistatic experiments such as airbone ones and some missions as tandem X are being carried out to try to explore the full potential of this kind of configurations At our university, in the RSLab, we have developed a Cband receiver that uses the ESA’s ERS2 and ENVISAT satellites as transmitters of opportunity, this receiver has been named SABRINA, SAR bistatic Receiver for Interferometric Applications, also we are working in a new version in X band which will be baptized as SABRINA-X
