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- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:14:40.000Z
Ridgetop Group will leverage its proven Electromechanical Actuator (EMA) prognostics methodology to develop an advanced model-based actuator prognostic reasoner (MAPR). Ridgetop's concept is a self-contained, embedded prognostic reasoner with a passive connection to common avionic data busses. By monitoring actuator health in real time and providing early warning of incipient fault conditions, the proposed MAPR would enable condition based maintenance (CBM) of critical avionic flight control systems and support safer, more reliable next generation air transportation. The novel approach will effectively decouple the passive prognostic reasoner from the target flight control system, or actuator, and will support multiple avionic data bus interfaces, such as MIL-STD-1553, easing adoption, validation, integration, and support. Potentially, a single MAPR could monitor multiple flight control systems, reducing overall sensor costs. Furthermore, an embedded MAPR implementation with field upgradeable firmware would support evolving interface standards and prognostic health measurement capabilities. Finally, the proposed MAPR architecture is ideally suited for hardware-in-the-loop (HIL) testing, which dramatically accelerates technology readiness and commercial introduction.
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:43:36.000Z
Manned spacecraft are vulnerable to air leaks caused by micrometeorite and space debris impact. The ability to detect and quickly locate and mitigate a pressure vessel breach is critical to the safety of any long duration spacecraft, such as the International Space Station or a proposed lunar base or mission to Mars. Current NASA protocol for finding a spacecraft leak uses a handheld ultrasonic directional microphone, similar to those widely deployed industrially, to detect the 40 kHz airborne ultrasonic hiss generated by the downstream leak turbulence. However, known limitations exist regarding the use of airborne ultrasonic emissions for locating leaks in the spacecraft environment because the downstream side of the leak occurs into the vacuum of space, creating reduced leak noise inside the pressure vessel. Blockages of the transmission of airborne ultrasonic energy by structural components, avionics, and equipment racks also limit the detection range of such systems. An alternative approach that we propose is to monitor the spacecraft structure itself---the pressure vessel skin---for leak-generated surface-borne ultrasound by means of a flexible and modular electronics package with fully integrated surface sensor arrays, data acquisition electronics, and radio frequency communication capabilities.
- API performance.smcgov.org | Last Updated 2019-05-11T00:26:15.000Z
SamTrans Service for Youth Elderly Disabled, NDSST Measure K
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:43:26.000Z
In this proposal, we describe a program to demonstrate the technical feasibility of a high-performance, cost-effective and robust microwave receiver for the detection of laser-generated ultrasound for NDE. Our innovative receiver is based on the integration of a microwave interferometer coupled with a pulsed laser to generate the ultrasound. By using a microwave interferometer design we will be able to overcome the limitation generally associated with classical optical receiver: 1) Inability to work in harsh environment where thermal and mechanical perturbations are present; 2) Reduction in sensitivity caused by the speckle nature of the light reflected from rough surfaces; 3) High system cost due the price of the different lasers, optics and engineering to develop an optical system working in a harsh environment and 4) high maintenance cost (Lasers and optics need to be checked, maintained and re-aligned frequently).
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:33:52.000Z
Instruments employing X-ray, gamma ray and particle detection are utilized in different sectors from medicine to industry and from basic to applied science. The solid-state detector array with detection ASIC is the primary technology of space-based high-energy astronomy missions that are managed by NASA in partnership with the international community1,2. A readout integrated circuitry (ROIC) specifically designed for photon resolving X-ray detection has been developed by Black Forest Engineering on prior NASA SBIR funding3. The BFE322 ROIC, bump bonded to a CdZnTe (CZT) 16x32 detector array, demonstrated single photon sensitivity, accurate X-ray energy determination, X-ray event time stamping, and low power dissipation (< 10 &#956;W per pixel) at ambient temperature operation; this represents a significant advancement in detection capability. The proposed Phase I improves ROIC performance by using low 1/f noise 250 nm CMOS, in-pixel amplifier tuning to match detector capacitance and rad-hard-by-design (RHBD) to provide >500 kRad radiation tolerance. The Phase I design will be a 32x32 pixel format with 600 ?m pixel pitch compatible with CZT and silicon detector arrays. The ROIC will be fabricated and hybridized to CZT on Phase II and demonstrated using a PocketQube or CubeSat mini-satellite test flight to establish a TRL> 6.
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-19T08:15:03.000Z
This data set provides active fire locations and estimates of annual fire frequencies for South America from 2000-2007. Data from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensors aboard the Terra (2000-2007) and Aqua (2003-2007) satellite platforms were analyzed to determine spatial and temporal patterns in satellite fire detections. The analysis considered a high-confidence subset of all MODIS fire detections to reduce the influence of false fire detections over small forest clearings in Amazonia (Schroeder et al., 2008). The number of unique days on which the active fire detections were recorded within a 1 km radius was estimated from the subset of active fire detections and the ArcGIS neighborhood variety algorithm. There are 14 data files with this data set: 7 GeoTIFF (.tif) files of fire frequency at MODIS 250 m resolution, where each grid cell value represents the number of days in that year on which active fires were detected, and 7 shape files of active fire locations for the years 2001-2007.
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:11:01.000Z
RNET has demonstrated the feasibility of developing an innovative radiation hardened (RH) and ultra low power (ULP) field programmable gate array (FPGA), called the RH/ULP FPGA. The design utilizes an advanced SOI process technology. It is the vision of RNET to develop a family of radiation hardened FPGA products with a variety of features including programmable logic, configurable analog functions, soft/hardcore microprocessor, dedicated DSP functions, I/O, dedicated memory blocks, memory controllers, global clock, and JTAG interface. In addition, specialized circuits for mitigation of TID/temperature effects, radiation hardened by design SEU techniques, and memory scrubbing are planned. Our vision at the conclusion of this proposed SBIR is to fabricate a "commercial" RH/ULP FPGA with the most important features listed. Ideally the FPGA to be developed under the proposed Phase 2 would contain all of these features, but due to the limitation of funds and allotted time, a scaled down version would be completed. The envisioned device will incorporate the basic programmable logic functions, dedicated block RAM, DSP functions, configurable I/O, global clock distribution network, and JTAG interface. Phase 2 will set the stage for more feature-rich product families to be developed as commercialization continues.
A 200 MHz Bandwidth, 4096 Spectral Channels, 3 W Power Consumption, Digital Auto-Correlation Spectrometer Chip for Spaceborne Microwave Radiometers Projectnasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:32:15.000Z
NASA?s program for Exploration of the Solar System requires high-resolution microwave spectrometers for the analysis of chemical composition and physical properties of solar system atmospheres. The anticipated results of the proposed R/R&amp;D effort (Phase I and II), if the project is successful, are to demonstrate experimentally the first digital auto-correlation spectrometer on a single chip for spaceborne microwave radiometers with the following important characteristics: (a) a bandwidth of 200 MHz, (b) 4096 spectral channels for high-resolution spectroscopy, (c) less than 3 W power consumption, (d) a mass of less that 800 grams, and (e) a space-qualifiable design and fabrication technology. The innovative approach proposed for achieving these significant objectives consists of a synergistic combination of the following: (a) a unique parallel architecture that will reduce the operating clock frequency, relative to a single-stream architecture, by a factor of 2 and consequently will lower significantly the power consumption, (b) novel differential analog and digital circuits that will improve robustness while operating in the presence of total dose natural radiation found in the space environment, and (c) an advanced 0.13 um CMOS fabrication process available from IBM for manufacturing high-performance, low-power, reliable, and robust (total dose radiation and latch-up resistant) space-qualifiable chips.
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-19T08:07:05.000Z
The Fourier-Adjusted, Sensor and Solar zenith angle corrected, Interpolated, Reconstructed (FASIR) adjusted Normalized Difference Vegetation Index (NDVI) data set and derived biophysical parameter fields were generated to provide a 17-year, satellite record of monthly changes in the photosynthetic activity of terrestrial vegetation. This multiple resolution (1/4, 1/2 and 1 degree in latitude and longitude) biophysical parameter data set contains essential variables for the calculation of photosynthesis, and the energy and water exchange between the Earth's surface (in particular of vegetation) and the lower boundary layer of the atmosphere. The Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is related to the light absorption and the photosynthetic capacity of vegetation. It also serves as an intermediate variable to calculate vegetation cover fraction (Vcover), total Leaf Area Index (LAI_T), green leaf area index (LAI_G), roughness length (z0), zero plane displacement (d), and snow-free albedo. The biophysical parameters were derived assuming one canopy layer. The production of the FASIR NDVI data set and its associated biophysical parameters was funded by NASA's Land Surface Hydrology program and the Higher Education Funding Council for Wales (HEFCW) as a core component of the International Satellite Land Surface Climatology Project (ISLSCP) Initiative II Data Collection.
- API nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T04:41:16.000Z
See the description of the EUR-L4UHRfnd-MED-ODYSSEA product