SAR2 Technical papers presented at the Automatic Target Recognition Session at the S.P.I.E. Aerosense Conference, Orlando, Florida, April 1997
1. Wallace, Affens, Rais, "Beaconless Search and Rescue Overview. The History, Development, and Achievements."
ABSTRACT: This paper describes the history, development and achievements of the beaconless search and rescue program conducted by the NASA Search and Rescue Mission office at Goddard Space Flight Center (GSFC).
2. Rogers, "Stochastic Clutter Characterization in NASA/JPL AIRSAR Imagery."
ABSTRACT: This paper presents a technique to model the stochastic clutter as a piecewise stationary random field. The individual stationary sub-regions of homogeneity in the field can then be characterized by marginal density functions. A technique is presented for the simultaneous characterization of the sub-regions of a random field based on semi-parametric density estimation on the entire random field. This technique is based on a borrowed strength methodology that allows the use of observations from potentially dissimilar sub-regions to improve local density estimation and hence random process characterization. This approach is demonstrated on a set of NASA/JPL AIRSAR images, including an example of clutter dependent crash site detection.
3. Solka, "Parallel Coordinate Plot Analysis of Polarimetric NASA/JPL AIRSAR Imagery."
ABSTRACT: Parallel coordinate plots are an important tool for performing exploratory data analysis in higher dimensional spaces. In this paper this technique is employed to analyze both different clutter/background types and to perform detailed analysis of particular crash sites.
4. Huxtable, Jackson, Mansfield, Rais, "A Synthetic Aperture Radar Processing System for Search and Rescue."
ABSTRACT: This paper describes the Search and Rescue Data Processing System (SARDPS) developed at Goddard Space Flight Center. SARDPS was developed for the Search and Rescue mission office in order to conduct research, development, and technology demonstration of SAR to quickly locate small crashed aircraft in remote areas. The final end-to-end processing system allows for raw SAR phase history data to be quickly converted to georeferenced map/image product with candidate crash site location identified.
5. McCandless, Cohen, Rogers, "Low Cost Airborne Synthetic Aperture Radar."
ABSTRACT: This paper describes the technology advances and implementation approach associated with low-cost and quick turnaround development of aircraft or unmanned aerial vehicle (UAV) synthetic aperture radar (SAR) systems used for mapping and change detection. Expensive antennas aligned with sophisticated motion compensation systems can be replaced by lower cost data processing systems. This approach permits the use of less expensive fixed antennas that can be mounted in a variety of locations on the aircraft or UAV.
6. Jackson, Mansfield, Rais, "Polarimetry and it use in Automatic Target Detection."
ABSTRACT: This paper presents the results of using the polarimetric information contained in SAR imagery in connection with SAR processing for speckle reduction, without any degradation of SAR resolution, and in automatic target detection for classifying the source of a particular scattering signature in an image. Results will come from SAR data collected by the NASA/JPL AIRSAR radar over remote forested regions, which contain crash sites of small aircraft.
7. Fain, Cameron, "Full Polarimetric Display of NASA/JPL AIRSAR P-Band Data from Gilmore Creek, AK (1993), Half Moon Bay, CA (1994), and Bishop, CA (1995)."
ABSTRACT: This paper presents the results of using full polarization symbol displays of reflector signatures and of simulated small aircraft crash sites for selected Search and Rescue SAR data gathered by the NASA/JPL AIRSAR. In addition a polarimetric comparison is made between reflector signatures extracted from ADTS MMW SAR scenes, AIRSAR scenes, and ideal reflector responses. It is demonstrated that full polarization displays can be used to quickly identify polarization calibration errors based on clutter responses alone.
8. Mansfield, Poehler, Rais, "SAR Coherent Change Detection (CCD) for Search and Rescue."
ABSTRACT: This paper describes a combination of advanced SAR interferometric techniques for using airborne SAR imagery to locate downed aircraft. Probable performance parameters are derived and some examples are given from actual data.
9. Mansfield, Rais, "The P-Band Focus Problem."
ABSTRACT: This paper describes an approach based on a variant of the Phase Gradient Autofocus algorithm, which provides the higher-order-than-quadratic phase correction needed by wide-beam radars. Focusing examples from AIRSAR P- and L-band SAR imagery are presented.
10. Green, Rogers, "A Data Management Approach to Search and Rescue SAR."
ABSTRACT: In addition to the hardware and pattern recognition issues, data management is recognized as a significant part of the overall problem of using SAR data to locate light plane crashes in remote areas. This paper presents a comprehensive data management framework suitable for this problem as well as other similar massive data set management problems. |
