NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
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The Advanced Volume Sensor Project is one element of the ONR Advanced Damage Countermeasures FNC program. The<br />
Volume Sensor Project is developing new methods for remote situational awareness <strong>and</strong> damage control event detection using<br />
conventional video cameras <strong>and</strong> other techniques. The Spectral-Based Volume Sensor (SBVS) Testbed uses a suite of<br />
single-element optical detectors operating outside the visible region. Event detection algorithms were developed to make use<br />
of the data generated by the SBVS Testbed. These algorithms detect flaming <strong>and</strong> smoldering sources both within <strong>and</strong> outside<br />
the SBVS Testbed’s field of view (FOV). A positive nuisance classification algorithm was also developed for arc welding <strong>and</strong><br />
similar nuisance events, which detected all welding events with extremely few false alarms. The developed algorithms were<br />
tested against data collected during the Volume Sensor Test Series 2, July to November 2003. Comparable performance to<br />
COTS OFDs was achieved for FOV flaming sources, <strong>and</strong> superior performance was demonstrated for partially or completely<br />
obscured flaming sources.<br />
DTIC<br />
Algorithms; Detection; Optical Measurement; Spectra<br />
20060001866 Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD USA<br />
Domestic Preparedness Program Evaluation of the Raid-M (Bruker Saxonia Analytik GmbH Rapid Alarm <strong>and</strong><br />
Identification Device - Monitor) Against Chemical Warfare Agents Summary Report<br />
Baranoski, John M.; Longworth, Terri L.; Aug. 1, 2003; 23 pp.; In English; Original contains color illustrations<br />
Report No.(s): AD-A440411; No Copyright; Avail.: Defense <strong>Technical</strong> Information Center (DTIC)<br />
This report characterizes the chemical warfare (CW) agent detection characteristics of the commercially available<br />
RAID-M. This instrument is an ion mobility spectrometer designed for detection <strong>and</strong> monitoring of chemical warfare agents.<br />
The instrument was tested against HD, GB, <strong>and</strong> GA vapor under various conditions. This report provides the emergency<br />
responders concerned with CW agent detection <strong>and</strong> verification an overview of the capabilities of the RAID-M.<br />
DTIC<br />
Chemical Warfare; Detection; Warning Systems<br />
20060001873 Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD USA<br />
Domestic Preparedness Program: Testing of SABRE 2000 H<strong>and</strong>held Trace <strong>and</strong> Vapor Detector Against Chemical<br />
Warfare Agents Summary Report<br />
Longworth, Terri L.; Ong, Kwok Y.; Aug. 1, 2001; 28 pp.; In English; Original contains color illustrations<br />
Report No.(s): AD-A440421; No Copyright; Avail.: Defense <strong>Technical</strong> Information Center (DTIC)<br />
This report characterizes the chemical warfare (CW) agent detection potential of the commercially available SABRE 2000<br />
H<strong>and</strong>held Trace <strong>and</strong> Vapor Detector. This instrument was tested against HD, GB, <strong>and</strong> GA vapors under various conditions.<br />
This report is intended to provide the emergency responders concerned with CW agent detection an overview of the detection<br />
capabilities of these instruments.<br />
DTIC<br />
Chemical Warfare; Vapors<br />
20060001893<br />
Signal Detection <strong>and</strong> Jammer Localization in Multipath Channels for Frequency Hopping Communications<br />
Liu, Xiangqian; Oct. 30, 2005; 28 pp.; In English<br />
Contract(s)/Grant(s): DAAD19-03-1-0228<br />
Report No.(s): AD-A440468; No Copyright; Avail.: Defense <strong>Technical</strong> Information Center (DTIC)<br />
Frequency hopping (FH) is the prevailing spread spectrum method in military communications, largely due to its low<br />
probability of detection <strong>and</strong> interception. In this project we developed a novel signal processing scheme for code-blind<br />
reception of multiple frequency hopped transmissions over multipath channels. This technique is based on the principle of<br />
dynamic programming <strong>and</strong>/or expectation-maximization, coupled with multidimensional harmonic <strong>and</strong> low-rank analysis. It<br />
is able to jointly estimate hop timing, hop frequency, <strong>and</strong> direction-of-arrival (DOA) of multiple FH signals in the presence<br />
of frequency collisions, without the knowledge of signal hop patterns. The method can also be used to obtain locate<br />
information <strong>and</strong> operation characteristics of active FH jammers. The associated identifiability of 2-D <strong>and</strong> multidimensional<br />
frequency estimation is also investigated.<br />
DTIC<br />
Frequency Hopping; Frequency Shift; Jammers; Multipath Transmission; Position (Location); Signal Detection<br />
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