Information Systems Laboratories, Inc. | Date: 2017-01-17
A gravity-based, non-invasive method of measuring a level of fluid in a container comprises use of at least one gravity meter located as proximate a center of mass of the fluid as possible. In a nuclear reactor system a method for monitoring the level of fluid in a nuclear reactor module, a report of a loss or gain of fluid within a cylindrical module may be generated from capturing a time series of gravity data from a first gravity meter mounted as an upper gravity meter and a second gravity meter mounted as a lower gravity meter, for example, proximate a cylindrical nuclear reactor module so as not to require any invasive conduit through, for example, a containment pressure vessel (CPV) or a reactor pressure vessel (RPV). In one embodiment, the upper and lower gravity meters are mounted on stable mounts as close to the fluid in the module as possible within a coolant pool or a structure containing cooled air. If a coolant pool of water surrounds a nuclear reactor module, the meters may be housed within a dry housing in the coolant pool such that the meters may be accessed from above the coolant pool and are located as close as possible to the reactor module and its contained mass of fluid.
Information Systems Laboratories, Inc. | Date: 2016-01-26
A radar antenna system includes a single transmitter for creating pulses from a wideband waveform. A splitter divides each pulse into half-power pulses, and sends them along respective paths. On one path, successive half-power pulses are alternately modulated with a phase shift _(A )or _(F). On the other path, the half-power pulses are not modulated. Each modulated half-power pulse is then combined with an un-modulated half-power pulse to transmit pulses of a full aperture beam with either _(A )or _(F). This establishes two degrees of freedom for the system. Two separate receivers then simultaneously receive the pulse echoes and a signal processor uses the consequent four degrees of freedom to create a radar indicator with mitigated clutter and useable azimuth estimation. A coherent processing interval can then be selected for multi-mode operation of the system.
Information Systems Laboratories, Inc. | Date: 2016-01-14
A simulator is provided for dynamically testing and evaluating an electromagnetic radiation in real-time. The performance of radiation from a system-under-test is evaluated as it interacts with a moving target in an ever-changing simulated environment. The simulator includes a computer for synchronized control of a PNT database and of an environmental database. In detail, the PNT database contains Position, Navigation and Timing (PNT) information of the target, and the environmental database contains information pertaining to meteorological conditions and topographical characteristics in the simulated environment. In combination, the computer evaluates a synchronized interaction of the electromagnetic radiation with the PNT information from the PNT database, under conditions set by the environmental database. A response record for evaluating a performance of the system-under-test is thereby created.
Agency: Department of Energy | Branch: | Program: STTR | Phase: Phase I | Award Amount: 149.81K | Year: 2015
The reactor vessel coolant level is currently measured primarily by differential pressure DP) and by heated junction thermocouple HTJC) probes. The DP gauge measures only collapsed water level and not two-phase level, while the HJTC probe indicates whether or not the water level has reached the elevation of a specific probe. The HJTC probes are typically located at discrete intervals so the measurement is not continuous. Gravimeter- based instruments have the potential for providing accurate, non-invasive and continuous reactor coolant inventory measurements. ISL will develop a new, innovative sensor designed to non-invasively measure coolant inventory distribution within the reactor vessel, based upon gravitational technology. The proposed study, if it establishes feasibility of the measurement technique, could lead to a major advancement for reactor coolant inventory monitoring, greatly enhancing the reactor performance in sustainability, safety and security aspects identified in Mission Supporting Transformative Research programs. Commercially available gravimeters with state-of-the-art sensitivity will be configured to measure coolant inventory in the Oregon State University MASLWR SMR prototype test facility, under a variety of conditions. Since the gravimeter-based system is non-invasive, our experiments not require modifications of the test facility and will be run concurrently with other testing. Accurate conversion of the gravitational output signals to coolant inventory information will be verified by comparison to data produced by the coolant level instrumentation in the MASLWR facility. The measured data will be compared to numerical models produced independently, for verification. After conclusion of the testing program, optimal gravimeter configuration and design features to enhance coolant inventory measurements will be determined, and implemented in the design of a commercialized system that will be directed to SMR applications. We will work with SMR vendors such as NuScale Power, LLC, to optimize the design according to their needs and expert feedback, in order to best commercialize the technology.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 750.00K | Year: 2015
ABSTRACT: The proliferation of digital hardware and high performance amplifiers has resulted in a high degree of signal similarity among radar systems. As a consequence, modern electronic warfare systems are facing a signal characterization and specific emitter identification problem using traditional methods. Under Phase I, ISL identified a novel multidimensional feature that is generally independent of the emitter waveform parameters. This new feature has allowed us to develop a novel solution to the problem of jamming advanced radar emitters. The overall objective of the Phase II program is the insertion of new electronic warfare (EW) techniques based on the new multidimensional feature into existing and planned EW systems including the ALQ-161. BENEFIT: The proposed SBIR program will provide the Air Force with the capability to identify and engage emerging advanced digital radar systems in complex RF environments.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 749.95K | Year: 2013
ABSTRACT: Radar sensors provide an important capability for combat missions involving air-to-air engagement of enemy aircraft. The main benefit of radar is the ability to detect targets at long stand-off ranges in all weather conditions. The main disadvantage is that radar transmissions are typically easily intercepted and provides a means for an adversary to both detect, track, and potentially target blue force aircraft. A new sensor system that exploits target illumination provided by commercial broadcast stations would provide an attractive air surveillance capability without the vulnerability of being intercepted that is inherent in traditional radar systems. During Phase I the feasibility of a new airborne passive radar system concept was established. Under Phase II the concept will be fully developed using a combination of simulated and experimental data collections. BENEFIT: The new system will provide the Air Force with a capability for covert air surveillance by providing a new passive RF sensor for combat aircraft that can display air target detections and tracks with militarily significant coverage and geolocation accuracy.
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 2.00M | Year: 2012
Bistatic radar processing by airborne signals intelligence (SIGINT) and other intelligence, surveillance, reconnaissance (ISR) platforms affords covert, passive exploitation of adversary or own-force radar systems to improve tactical situational awareness and fused intelligence products. Traditionally these bistatic signals have been ignored or unexploited by existing SIGINT/ELINT. The bistatic signals, however, contain a rich set of radar returns from both targets and cultural and natural features (i.e., clutter) that can be used to improve emitter geolocation as well as provide covert surveillance of enemy aircraft. Exploiting the bistatic signals, however, requires both novel signal processing algorithms and advanced processing architectures that can meet the challenging computing requirements for extracting the information contained in the bistatic returns. Under a successful Phase I effort, ISL established feasibility of the bistatic processing concept by showing that advanced intelligence products can be extracted from the bistatic clutter returns in a computer with a form factor that is appropriate for integration on an airborne SIGINT collection platform. The proposed Phase II program will refine the processing concept developed in Phase I and show that it can be implemented in low-cost hardware.
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 3.00M | Year: 2012
ISL Inc. teamed with APS and ERAPSCO in Phase I to explore the benefits of an underwater sensor that collects both acoustic and electric field (E-field) signals. Exploitation of both signals offers new possibilities for sensor cueing, data fusion, and classification. In Phase II, data were collected against actual targets, and the advantages of dual-signal data fusion was confirmed, in increased detections, false alarm reduction, vessel classification and kinematic tracking. The Phase 2.5 program will design, fabricate and test an A-size prototype of a combined E-field/acoustic sonobuoy, that is air-launchable. ISL and ERAPSCO will work together to finalize the sonobuoy design begun in Phase II, and fabricate it into an A-size prototype. The E-field electronics, mechanical electrode deployment and data communications will be integrated into a DIFAR SSQ-53 electronic and physical framework. Extensive lab and at-sea testing will be accomplished, and prototype sonobuoys will be launched against a target in a 2012 Fleet test. Finally, preliminary air-worthiness evaluations will be conducted, in preparation for final air and sea tests to be accomplished in Phase 3. At that time, the sonobuoys will be ready for air-launched intelligence data collections as their first application.
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 975.86K | Year: 2012
A wide variety of unmanned air vehicles (UAVs) carrying various sensors are increasingly deployed on today"s battlefield for intelligence, surveillance and reconnaissance (ISR) missions. These UAV platforms provide a wealth of ISR data mainly captured with video sensors. These video sensors provide considerable amounts of data for exploitation, suitable for various types of assisted and autonomous processing including target tracking, aimpoint generation, forensic analysis, and behavioral characterization. Generally the smaller UAVs do not have existing sensor models and sensor pointing direction may not be well known. These limitations make associating accurate position information with the full motion video (FMV) difficult using current techniques. Under previous SBIR funding, ISL developed the Full Motion Video Georegistration Application (FMVGA) to automatically produce georegistered FMV, i.e. a three-dimensional geoposition coordinate (latitude, longitude, and elevation) associated with every pixel of the video without the requirement for an associated sensor model or platform position information. In the proposed program, ISL will implement improvements identified by users during the evaluation process. These improvements will include 1) computational improvements, 2) application improvements to improve robustness, and 3) interface improvements. At the end of this program the FMVGA will have been evaluated in an operational setting and available for transition.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 149.93K | Year: 2013
ABSTRACT: The global proliferation of modern"digital"radar systems has resulted in a two-pronged crisis for traditional electronic intelligence (ELINT) emitter identification (ID) methods: (1) the sheer increase in radio frequency (RF) emitters sharing similar characteristics and of course spectrum and (2) ever increasing digitization of radar front-ends including solid state transmitters, digital arbitrary waveform generators (DAWGS), and active electronically scanned arrays (AESAs). The former exacerbates the need for higher precision SEI while the latter unfortunately makes it much more difficult to accomplish reliable SEI using classical methods. Under this SBIR program ISL will develop new SEI techniques that overcome these problems and provide the Air Force with a capability to engage emerging emitter threats in complex RF environments. BENEFIT: The proposed SBIR program will provide the Air Force with the capability to identify and engage emerging advanced digital radar systems in complex RF environments.