R. Bamler - Academia.edu (original) (raw)
Papers by R. Bamler
Optica Acta: International Journal of Optics, 1983
... Figure 4. Coherent optical generation of the WDF by sandwiching two properly shifted and rota... more ... Figure 4. Coherent optical generation of the WDF by sandwiching two properly shifted and rotated transparencies followed by an optical Fourier transformation. 222 222 222 1 xo+yo x'/ , y'/2 ZZZZZZ LLL d III W Figure 5. Parallel generation of several sections through the WDF . ...
IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174), 1998
So far spaceborne SAR are the only all weather systems to provide directional ocean wave informat... more So far spaceborne SAR are the only all weather systems to provide directional ocean wave information on a continuos and global basis. However some care must be taken using SAR data to derive 2D ocean wave spectra; basic SAR principles cause unrecoverable information loss in the imaging process, and incomplete understanding of ocean wave imaging mechanisms leads to unsatisfactory exploitation
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
The very high geometric accuracy of geocoded data of the TerraSAR-X satellite has been shown in s... more The very high geometric accuracy of geocoded data of the TerraSAR-X satellite has been shown in several investigations. It is due to the fact that it measures distances which are mainly dependent on the position of the satellite and the terrain height. If the used DEM is of high accuracy, ...
2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2000
During February 11th-22nd, 2000, the Shuttle Radar Topography Mission (SRTM) imaged the Earth wit... more During February 11th-22nd, 2000, the Shuttle Radar Topography Mission (SRTM) imaged the Earth with the first spaceborne single-pass SAR interferometer. The acquired data set will greatly enhance the knowledge of the global topography. At DLR the German Remote Sensing Data Center will process the X-band SAR data set to a nearly global homogenous digital elevation model (DEM). This work summarizes
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
Estimation of differential shift of image elements between two SAR images is the basis for many a... more Estimation of differential shift of image elements between two SAR images is the basis for many applications, like DEM generation or ground motion mapping. The shift measurement can be done nonambiguously on the macro scale at the accuracy of the range resolution of the system or on the micro scale by employing interferometric methods. The latter suffers from phase cycle
Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, 1994
ABSTRACT
2011 Joint Urban Remote Sensing Event, 2011
The new generation of high resolution Synthetic Aperture Radar (SAR) sensors provide new &... more The new generation of high resolution Synthetic Aperture Radar (SAR) sensors provide new "light" in the imaging and monitoring of urban areas. Buildings and many ground structures can be monitored to an unprecedented accuracy. Nevertheless new problems, such as the interference of the response of scatterers in layover areas and deformations due to thermal dilation, arise and need to be
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
DLR is currently studying a space borne mission based on two L-band satellites to map Earth surfa... more DLR is currently studying a space borne mission based on two L-band satellites to map Earth surface deformation and vegetation structure from space. In this study the scientific requirements for deformation measurements are collected, traded off versus technical feasibility and a mission concept is investigated that provides a global monitoring capability of geo-tectonic threats.
Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 1993
Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 1993
The German/Italian X-SAR is an X-band SAR to be flown together with the SIR-C instrument on the S... more The German/Italian X-SAR is an X-band SAR to be flown together with the SIR-C instrument on the Shuttle Radar Lab missions in April and December 1994. The paper describes the algorithms used in the X-SAR processor at DLR
10th Intl Optical Computing Conf, 1983
ABSTRACT
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
ABSTRACT
[Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management, 1991
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
We address the problem of resolving two closely spaced complex-valued points from N irregular Fou... more We address the problem of resolving two closely spaced complex-valued points from N irregular Fourier domain samples. Although this is a generic super-resolution problem, our target application is SAR tomography where typically the number of acquisitions is N = 10…100 and SNR = 0 …10dB. In this paper, a compressive sensing based algorithm is introduced for tomographic SAR inversion. It is named “Scale-down by L1 norm Minimization, Model selection, and Estimation Reconstruction” (SL1MMER, pronounced "slimmer"). SL1MMER combines the advantage of compressive sensing, e.g. high localization accuracy and super-resolution, and the radiometric accuracy of the linear estimator. Moreover, a systematic performance assessment of the SL1MMER algorithm is carried out regarding the elevation estimation accuracy and super-resolution. It is proven that SL1MMER is an efficient estimator; its superresolution factors are in the range of 1.5 to 25 for the aforementioned parameter ranges of N and SNR. Our results are approximately applicable to nonlinear least-squares estimation, and hence can be considered as fundamental bounds for super-resolution of spectral estimators.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
2013 18th International Conference on Digital Signal Processing (DSP), 2013
ABSTRACT
Transformations in Optical Signal Processing, 1984
ABSTRACT
Optica Acta: International Journal of Optics, 1983
... Figure 4. Coherent optical generation of the WDF by sandwiching two properly shifted and rota... more ... Figure 4. Coherent optical generation of the WDF by sandwiching two properly shifted and rotated transparencies followed by an optical Fourier transformation. 222 222 222 1 xo+yo x'/ , y'/2 ZZZZZZ LLL d III W Figure 5. Parallel generation of several sections through the WDF . ...
IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174), 1998
So far spaceborne SAR are the only all weather systems to provide directional ocean wave informat... more So far spaceborne SAR are the only all weather systems to provide directional ocean wave information on a continuos and global basis. However some care must be taken using SAR data to derive 2D ocean wave spectra; basic SAR principles cause unrecoverable information loss in the imaging process, and incomplete understanding of ocean wave imaging mechanisms leads to unsatisfactory exploitation
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
The very high geometric accuracy of geocoded data of the TerraSAR-X satellite has been shown in s... more The very high geometric accuracy of geocoded data of the TerraSAR-X satellite has been shown in several investigations. It is due to the fact that it measures distances which are mainly dependent on the position of the satellite and the terrain height. If the used DEM is of high accuracy, ...
2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2000
During February 11th-22nd, 2000, the Shuttle Radar Topography Mission (SRTM) imaged the Earth wit... more During February 11th-22nd, 2000, the Shuttle Radar Topography Mission (SRTM) imaged the Earth with the first spaceborne single-pass SAR interferometer. The acquired data set will greatly enhance the knowledge of the global topography. At DLR the German Remote Sensing Data Center will process the X-band SAR data set to a nearly global homogenous digital elevation model (DEM). This work summarizes
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
Estimation of differential shift of image elements between two SAR images is the basis for many a... more Estimation of differential shift of image elements between two SAR images is the basis for many applications, like DEM generation or ground motion mapping. The shift measurement can be done nonambiguously on the macro scale at the accuracy of the range resolution of the system or on the micro scale by employing interferometric methods. The latter suffers from phase cycle
Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, 1994
ABSTRACT
2011 Joint Urban Remote Sensing Event, 2011
The new generation of high resolution Synthetic Aperture Radar (SAR) sensors provide new &... more The new generation of high resolution Synthetic Aperture Radar (SAR) sensors provide new "light" in the imaging and monitoring of urban areas. Buildings and many ground structures can be monitored to an unprecedented accuracy. Nevertheless new problems, such as the interference of the response of scatterers in layover areas and deformations due to thermal dilation, arise and need to be
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
DLR is currently studying a space borne mission based on two L-band satellites to map Earth surfa... more DLR is currently studying a space borne mission based on two L-band satellites to map Earth surface deformation and vegetation structure from space. In this study the scientific requirements for deformation measurements are collected, traded off versus technical feasibility and a mission concept is investigated that provides a global monitoring capability of geo-tectonic threats.
Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 1993
Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 1993
The German/Italian X-SAR is an X-band SAR to be flown together with the SIR-C instrument on the S... more The German/Italian X-SAR is an X-band SAR to be flown together with the SIR-C instrument on the Shuttle Radar Lab missions in April and December 1994. The paper describes the algorithms used in the X-SAR processor at DLR
10th Intl Optical Computing Conf, 1983
ABSTRACT
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
ABSTRACT
[Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management, 1991
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
We address the problem of resolving two closely spaced complex-valued points from N irregular Fou... more We address the problem of resolving two closely spaced complex-valued points from N irregular Fourier domain samples. Although this is a generic super-resolution problem, our target application is SAR tomography where typically the number of acquisitions is N = 10…100 and SNR = 0 …10dB. In this paper, a compressive sensing based algorithm is introduced for tomographic SAR inversion. It is named “Scale-down by L1 norm Minimization, Model selection, and Estimation Reconstruction” (SL1MMER, pronounced "slimmer"). SL1MMER combines the advantage of compressive sensing, e.g. high localization accuracy and super-resolution, and the radiometric accuracy of the linear estimator. Moreover, a systematic performance assessment of the SL1MMER algorithm is carried out regarding the elevation estimation accuracy and super-resolution. It is proven that SL1MMER is an efficient estimator; its superresolution factors are in the range of 1.5 to 25 for the aforementioned parameter ranges of N and SNR. Our results are approximately applicable to nonlinear least-squares estimation, and hence can be considered as fundamental bounds for super-resolution of spectral estimators.
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
2013 18th International Conference on Digital Signal Processing (DSP), 2013
ABSTRACT
Transformations in Optical Signal Processing, 1984
ABSTRACT