Mr. Stephan Dill Profile

Stephan Dill

at Deutsches Zentrum für Luft und Raumfahrt eV

SPIE Involvement:

Conference Program Committee | Author

Publications (24)

PROCEEDINGS ARTICLE | October 5, 2018

Stand-off sensing of material characteristics by polarimetric MMW radiometry

Proc. SPIE. 10800, Millimetre Wave and Terahertz Sensors and Technology XI

KEYWORDS: Polarization, Reflection, Remote sensing, Dielectrics, Polarimetry, Antennas, Radiometry, Microwave radiation, Dielectric polarization

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PROCEEDINGS ARTICLE | May 8, 2018

Review of atmospheric effects on remote sensing by MMW radar and radiometer systems

Proc. SPIE. 10634, Passive and Active Millimeter-Wave Imaging XXI

KEYWORDS: Radar, Extremely high frequency, Data modeling, Imaging systems, Sensors, X band, Radiometry, Atmospheric sensing, Atmospheric modeling, Temperature metrology

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PROCEEDINGS ARTICLE | May 4, 2018

Characterization of wall structures with microwaves

Proc. SPIE. 10633, Radar Sensor Technology XXII

KEYWORDS: Radar, Polarization, Dielectrics, Image resolution, Wave propagation, Solids, Antennas, Microwave radiation

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PROCEEDINGS ARTICLE | May 4, 2018

Imaging of satellites in space (IoSiS): challenges in image processing of ground-based high-resolution ISAR data

Proc. SPIE. 10633, Radar Sensor Technology XXII

KEYWORDS: Radar, Imaging systems, Satellites, Image processing, Distortion, Satellite imaging, Antennas, Spatial resolution, Earth's atmosphere, Troposphere

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PROCEEDINGS ARTICLE | May 11, 2017

Improved characterization of scenes with a combination of MMW radar and radiometer information

Proc. SPIE. 10189, Passive and Active Millimeter-Wave Imaging XX

KEYWORDS: Radar, Defense and security, Extremely high frequency, Imaging systems, Sensors, Remote sensing, Receivers, Sensing systems, Image enhancement, Radiometry, Radar imaging, Millimeter wave sensors, Enhanced vision, Passive millimeter wave imaging, Improvised explosive device detection

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For security related applications MMW radar and radiometer systems in remote sensing or stand-off configurations are well established techniques. The range of development stages extends from experimental to commercial systems on the civil and military market. Typical examples are systems for personnel screening at airports for concealed object detection under clothing, enhanced vision or landing aid for helicopter and vehicle based systems for suspicious object or IED detection along roads. Due to the physical principle of active (radar) and passive (radiometer) MMW measurement techniques the appearance of single objects and thus the complete scenario is rather different for radar and radiometer images. A reasonable combination of both measurement techniques could lead to enhanced object information. However, some technical requirements should be taken into account. The imaging geometry for both sensors should be nearly identical, the geometrical resolution and the wavelength should be similar and at best the imaging process should be carried out simultaneously. Therefore theoretical and experimental investigations on a suitable combination of MMW radar and radiometer information have been conducted. First experiments in 2016 have been done with an imaging linescanner based on a cylindrical imaging geometry [1]. It combines a horizontal line scan in azimuth with a linear motion in vertical direction for the second image dimension. The main drawback of the system is the limited number of pixel in vertical dimension at a certain distance. Nevertheless the near range imaging results where promising. Therefore the combination of radar and radiometer sensor was assembled on the DLR wide-field-of-view linescanner ABOSCA which is based on a spherical imaging geometry [2]. A comparison of both imaging systems is discussed. The investigations concentrate on rather basic scenarios with canonical targets like flat plates, spheres, corner reflectors and cylinders. First experimental measurement results with the ABOSCA linescanner are shown.

PROCEEDINGS ARTICLE | May 3, 2017

Investigations on the detection of thin wires using MIMO SAR

Proc. SPIE. 10182, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXII

KEYWORDS: Radar, Reflectors, Explosives detection, Sensors, Synthetic aperture radar, Antennas, Explosives, Improvised explosive devices, Device simulation, Land mines

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PROCEEDINGS ARTICLE | May 1, 2017

IoSiS: a radar system for imaging of satellites in space

Proc. SPIE. 10188, Radar Sensor Technology XXI

KEYWORDS: Radar, Reflectors, Imaging systems, Calibration, Satellites, Synthetic aperture radar, Photography, Control systems, Satellite imaging, Antennas, Radar imaging, Radar sensor technology

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PROCEEDINGS ARTICLE | May 12, 2016

Combining MMW radar and radiometer images for enhanced characterization of scenes

Proc. SPIE. 9830, Passive and Active Millimeter-Wave Imaging XIX

KEYWORDS: Radar, Reflectors, Extremely high frequency, Sensors, Photography, Receivers, Antennas, Terbium, Radiometry, Radar imaging

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PROCEEDINGS ARTICLE | May 3, 2016

Detection of landmines and UXO using advanced synthetic aperture radar technology

Proc. SPIE. 9823, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI

KEYWORDS: Radar, Superposition, Soil science, Polarization, Sensors, Synthetic aperture radar, Antennas, 3D image processing, Land mines, General packet radio service

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PROCEEDINGS ARTICLE | June 9, 2014

Determination of truck load by microwave and millimeter-wave imaging

Proc. SPIE. 9078, Passive and Active Millimeter-Wave Imaging XVII

KEYWORDS: Radar, Roads, Extremely high frequency, Millimeter wave imaging, Sensors, Dielectrics, Antennas, Radiometry, Microwave radiation, Information security

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PROCEEDINGS ARTICLE | October 18, 2013

A fast imaging MMW radiometer system for security and safety applications

Proc. SPIE. 8900, Millimetre Wave and Terahertz Sensors and Technology VI

KEYWORDS: Infrared cameras, Infrared imaging, Radio optics, Imaging systems, Sensors, Image acquisition, Receivers, Image sensors, Antennas, Radiometry

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PROCEEDINGS ARTICLE | May 31, 2013

SUMIRAD: a low-cost fast millimeter-wave radiometric imaging system

Proc. SPIE. 8715, Passive and Active Millimeter-Wave Imaging XVI

KEYWORDS: Radar, Roads, Extremely high frequency, Visualization, Imaging systems, Cameras, Sensors, Metals, Video, Radiometry

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PROCEEDINGS ARTICLE | October 26, 2012

SUMIRAD: a near real-time mmw radiometer imaging system for threat detection in an urban environment

Proc. SPIE. 8544, Millimetre Wave and Terahertz Sensors and Technology V

KEYWORDS: Radar, Imaging systems, Sensors, Image processing, Photography, Receivers, Antennas, Radiometry, Environmental sensing, Data fusion

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PROCEEDINGS ARTICLE | October 13, 2011

Investigation of security related fully polarimetric signatures of radiometer measurements at W band

Proc. SPIE. 8188, Millimetre Wave and Terahertz Sensors and Technology IV

KEYWORDS: Imaging systems, Photography, Receivers, Polarimetry, Antennas, Radiometry, Information security, Dielectric polarization, Temperature metrology, Anisotropy

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PROCEEDINGS ARTICLE | May 26, 2011

Investigation of fully-polarimetric signatures from targets with some relevance to security applications

Proc. SPIE. 8022, Passive Millimeter-Wave Imaging Technology XIV

KEYWORDS: Polarization, Imaging systems, Photography, Receivers, Polarimetry, Radiometry, Information security, Dielectric polarization, Temperature metrology, Anisotropy

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PROCEEDINGS ARTICLE | October 20, 2010

Fully-polarimetric passive MMW imaging systems for security applications

Proc. SPIE. 7837, Millimetre Wave and Terahertz Sensors and Technology III

KEYWORDS: Extremely high frequency, Polarization, Imaging systems, Receivers, Polarimetry, Antennas, Radiometry, Microwave radiation, Information security, Temperature metrology

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PROCEEDINGS ARTICLE | September 24, 2009

Further analysis and evaluation of the results of the NATO common shield-DAT#7 experiment: defence against terrorism

Proc. SPIE. 7485, Millimetre Wave and Terahertz Sensors and Technology II

KEYWORDS: Defense and security, Extremely high frequency, Imaging systems, Sensors, Scanners, Receivers, Image sensors, Explosives, Radiometry, Microwave radiation

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The contactless control of persons and the remote surveillance of sensitive infrastructures are important tasks in order to provide the required security measures to protect the human population against the threads of international terrorism. Passive microwave imaging allows a daytime independent observation and examination of objects and persons under nearly all adverse ambient conditions without artificial exposure, hence fully avoiding health risks. The penetration capability of microwaves provides the detection of objects through atmospheric obstacles like bad weather, fog or dust, vapour and smoke, as well as through thin non-metallic materials and clothing. For the latter the detection of hidden objects like weapons, explosives, and contraband is possible by monitoring dielectric anomalies. The experiment "Common Shield" is part of a perennial investigation series leaded by the "Center for Transformation of the German armed forces (Bundeswehr)". In 2008 the protection of soldiers and facilities was experimentally investigated under the aspect of a networked operational leadership. In this context as well a harbour protection trial was carried out in August/September 2008 at the naval base Eckernfoerde in Germany. This trial was part of the NATO CNADs program of work for "Defence Against Terrorism (DAT)" starting in 2003, and Germany is the lead nation for item 7 on "Technology for Intelligence, Surveillance, Reconnaissance & Target Acquisition of Terrorists (ISRTA)". One main activity in the Eckernfoerde trial was the simulation of a military entrance control facility by a tent including various imaging and a chemical sensor suite in order to provide security for a military camp. Besides commercial optical and infrared cameras various passive millimeter-wave imagers have been used from different German research institutions. The DLR Microwaves and Radar Institute, Department for Reconnaissance and Security (HR-AS), provided an imaging radiometer scanner operating at W band. A multitude of situations have been simulated and many persons carrying hidden objects under their clothing have been scanned. The ongoing evaluation of the radiometer measurements are shown and discussed in the paper.

PROCEEDINGS ARTICLE | April 30, 2009

Results and experiences from the NATO Common Shield DAT#7 experiment for the Defence Against Terrorism program

Proc. SPIE. 7309, Passive Millimeter-Wave Imaging Technology XII

KEYWORDS: Defense and security, Extremely high frequency, Imaging systems, Sensors, Scanners, Receivers, Antennas, Explosives, Radiometry, Microwave radiation

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PROCEEDINGS ARTICLE | April 30, 2009

Highly resolved turntable ISAR signature extraction for ATR

Proc. SPIE. 7308, Radar Sensor Technology XIII

KEYWORDS: Radar, Signal to noise ratio, Scattering, Sensors, Synthetic aperture radar, Image processing, Image resolution, Automatic target recognition, Radar imaging, Binary data

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PROCEEDINGS ARTICLE | October 2, 2008

Study of passive MMW personnel imaging with respect to suspicious and common concealed objects for security applications

Proc. SPIE. 7117, Millimetre Wave and Terahertz Sensors and Technology

KEYWORDS: Weapons, Extremely high frequency, Radio optics, Imaging systems, Receivers, Terahertz radiation, Antennas, Radiometry, Spatial resolution, Microwave radiation

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PROCEEDINGS ARTICLE | April 18, 2008

The monitoring of critical infrastructures using microwave radiometers

Proc. SPIE. 6948, Passive Millimeter-Wave Imaging Technology XI

KEYWORDS: Extremely high frequency, Imaging systems, Sensors, Signal attenuation, Receivers, Surveillance, Antennas, Radiometry, Spatial resolution, Microwave radiation

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PROCEEDINGS ARTICLE | May 1, 2007

Determination of dielectric material properties using passive MMW measurements for security applications

Proc. SPIE. 6548, Passive Millimeter-Wave Imaging Technology X

KEYWORDS: Extremely high frequency, Waveguides, Metals, Dielectrics, Reflectivity, Receivers, Antennas, Radiometry, Microwave radiation, Dielectric polarization

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PROCEEDINGS ARTICLE | May 5, 2006

Radiometric measurements of dielectric material properties at MMW frequencies for security applications

Proc. SPIE. 6211, Passive Millimeter-Wave Imaging Technology IX

KEYWORDS: Extremely high frequency, Polarization, Metals, Error analysis, Dielectrics, Reflectivity, Antennas, Radiometry, Microwave radiation, Temperature metrology

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PROCEEDINGS ARTICLE | August 20, 2003

High-resolution passive millimeter-wave imaging technologies for reconnaissance and surveillance

Proc. SPIE. 5077, Passive Millimeter-Wave Imaging Technology VI and Radar Sensor Technology VII

KEYWORDS: Target detection, Imaging systems, Image resolution, Surveillance, Synthetic apertures, Antennas, Reconnaissance, Radiometry, Spatial resolution, Passive millimeter wave imaging

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