- API data.nasa.gov | Last Updated 2018-07-19T07:55:56.000Z
Monitoring of structural strain is a well-established method for assessing the fatigue life and operational loads of aerospace vessels, aircraft, bridges, and other load-bearing structures. Information from extensive instrumentation using 100's to 1000's of strain gages can be fed into a condition based maintenance (CBM) algorithm to improve structural health assessments, detect damage, and lower maintenance costs. Current methods for measuring strain are too cumbersome, bulky, and costly to be practical for a large scale dense network of strain sensors. Furthermore, existing piezoelectric-based vibrational energy harvesters are built around general purpose components designed for operation in low-temperature application spaces. To realize pervasive structural health monitoring across a wide range of thermal and vibrational environments, a low cost, minimally intrusive, low maintenance, and reliable technology is needed. Cutting edge microelectromechanical systems (MEMS) sensors for measurements of strain, acceleration, pressure, acoustic emission, and temperature are becoming increasingly available for use in CBM and structural health monitoring (SHM). While these sensors offer a promising future for wireless sensing networks (WSN), implementation for CBM remains cumbersome due to the lack of versatile, cost-effective powering solutions. Wiring external power to sensors is an unattractive solution given the required installation overhead and associated maintenance costs. Battery powered solutions are unreliable and battery maintenance for a dense network of thousands of sensor nodes is not practical. For this STTR effort, Prime Photonics proposes to team with Virginia Tech to develop a multimode vibrational-thermal harvester with effective energy capture and efficient conversion.
Low Cost Automated Manufacture of High Efficiency THINS ZTJ PV Blanket Technology (P-NASA12-007), Phase Idata.nasa.gov | Last Updated 2018-07-19T09:38:25.000Z
NASA needs lower cost solar arrays with high performance for a variety of missions. While high efficiency, space-qualified solar cells are in themselves costly, > $250/Watt, there is considerable additional cost associated with the parts and labor needed to integrate the Photovoltaic Assembly. The standard approach has evolved with only minor changes, sacrificing cost because of risk aversion. Integration cost can be as much as double the bare cell cost – i.e. >$500/watt. Dramatic cost savings can be realized through manufacturing engineering of more efficient automated assembly processes. If the design of the Photovoltaic Assembly could be modified to be compatible with conventional and automatable electronic assembly and terrestrial solar panel assembly approaches, there could be considerable cost savings. There are many additional benefits with automation which include higher quality and consistency. This can reduce failures, increase production throughput, speed turnaround, and improve overall reliability. Cost and quality improvements can be realized on both thin and rigid arrays, increasing current capabilities, and enabling future high power missions. The benefits of automation are enhanced by the need for high power generation in support of energy intensive space missions. A 300kW array at $500/W would cost $150M just for the solar cell integrated array panels. A $150/W cell integration cost reduction would translate into savings of $45M, before considering the immediate and substantial benefits in consistency, reliability, and schedule. The Phase I effort demonstrates feasibility of a low cost array using an automated and integrated manufacturing approach, performed on an automation friendly solar cell, verified with environmental testing, and is used to predict array cost for a high power mission. Meeting these technical objectives will demonstrate reduced cost and justify a Phase II SBIR program preparing for a flight experiment.
- API data.nasa.gov | Last Updated 2018-07-19T07:02:30.000Z
The eight color asteroid survey provides reflection spectra for minor planets using eight filter passbands. This dataset includes the primary data obtained for 589 minor planets. The mean values for each minor planet included in the survey, the response curves for the filters, and the values determined for standard stars, are included in other related datasets. The wavelength range covered is from .33 to 1.04 micrometers.
- API data.nasa.gov | Last Updated 2018-07-19T03:28:23.000Z
This data set contains calibrated, narrow band filter images (350-950 nm) of Earth acquired by the Deep Impact High Resolution Visible CCD (HRIV) during the EPOCh and Cruise 2 phases of the EPOXI mission. Five sets of observations were acquired on 18-19 March, 28-29 May and 04-05 June 2008 and on 27-28 March and 04-05 October 2009 to characterize Earth as an analog for extrasolar planets. Each observing period lasted approximately 24 hours. HRIV images were acquired once per hour with the filters centered on 350, 750 and 950 nm, whereas the 450-, 550-, 650-, and 850-nm data were taken every 15 minutes. During the observing period in May 2008, the Moon transited across Earth as seen from the spacecraft. On 27 September 2009 during the first attempt of an Earth south polar observation, only seven HRIV frames were acquired before fault protection turned that instrument off; the full sequence was successfully rerun on 04-05 October 2009. Version 2.0 includes the application of a horizontal destriping process and revised electronic crosstalk calibration files.
- API data.nasa.gov | Last Updated 2018-07-19T16:15:59.000Z
Dropsondes are one of the primary in-situ measurement tools available to research aircraft and Unmanned Aerial Vehicles (UAVs). Unlike sensors mounted on aircraft, dropsondes allow a vertical profile of the atmosphere to be taken below the aircraft. A guided dropsonde which could glide away from the launch aircraft will allow profiles to be taken away from the aircraft flight path, and would offer aircraft the ability to deploy dropsondes into dangerous environments, such as thunderstorms and volcanic plumes, where few aircraft are able to safely venture. Anasphere, Inc., in cooperation with Vanilla Aircraft, Inc., proposes to develop a guided dropsonde to meet this need. This dropsonde will be designed as a lifting body. It will build upon an existing miniature dropsonde developed by Anasphere, have essentially no moving parts, retain the ability to return wind profiles along with accurate meteorological data, and have sufficient speed to penetrate moderate headwinds. Phase I work will include designing and prototyping the aerodynamic form, integrating essential guidance electronics, and conducting extensive glide tests. Phase II work will include the integration of complete sensor, guidance, and communications payloads, refinement of the aerodynamic form, and extensive live flight tests from high altitude.
- API data.nasa.gov | Last Updated 2018-07-19T08:11:16.000Z
NASA is developing methods to collect and convert local resources such as Martian air (mainly carbon dioxide, CO2) into oxygen that can be used during the mission. The objective of this project is to protect such equipment from dust that may be sucked in with the CO2. We proposed an innovative dust filtration system that is ideally suited for long duration operation in Mars because it works well in a low pressure environment and it is essentially self-cleaning. The system is based on two mechanisms of dust filtration that have been tested separately and successfully In Phase I. In Phase II, parametric tests will be performed with simulated Mars dust and under simulated Mars environment to optimize each mechanism. Then the two mechanisms will be combined in a prototype and tested. The prototype will be delivered to NASA for potential future tests in the zero gravity airplane and in combination with the equipment to be protected.
- API data.nasa.gov | Last Updated 2018-07-20T07:21:25.000Z
Global Science & Technology, Inc. (GST) proposes to investigate information processing and delivery technologies to provide near-real-time Web-based access to satellite data from the National Polar-Orbiting Environmental Satellite System (NPOESS) Preparatory Project (NPP). We will investigate computing hardware and software requirements for serving data products acquired through NPP Direct Broadcast to modelers, forecasters, and decision-makers, via industry-standard Web services, within minutes of sensor acquisition. This effort will fill in a notable gap in the transition between current observational systems and the future NPOESS (National Polar-Orbiting Environmental Satellite System.
- API data.nasa.gov | Last Updated 2018-07-19T07:56:45.000Z
<p>The goal is to develop an atmospheric plasma jet that is capable of depositing a wide variety of materials on flexible substrates such as paper, plastic, cotton and thin metal foils. This would be a dry alternative to inkjet printing. There has been an increased interest in fabricating electronic devices on flexible substrates with enhanced emphasis on recyclable materials.</p> <p>Atmospheric pressure plasma may be a low cost solution to provide 100% efficiency with respect to sterilization. It creates oxygen atoms, ions which are effective in sterilization in addition to the help from the UV of the plasma, ion bombardment and the mild heat the plasma produces. This combination of effects is the reason for the 100% efficiency. We have already constructed a single plasma jet and ignited the plasma at atmospheric pressure. This minimize the risk. The nozzle diameter now is 5 mm. Power consumption is extremely low. Major Milestones for FY16: We will show at the end of CIF 100% killing of e-coli within minutes which is not possible using dry heat. Multi jet design and demonstration.</p>
- API data.nasa.gov | Last Updated 2018-07-19T08:28:51.000Z
<p>The Global Aerosol Measurement System (GAMS) project is developing a new, low cost satellite capability for measuring the properties and distributions of particles in the upper troposphere and lower stratosphere (collectively, the UTLS). This altitude region is important because there have been observed increases in the amount of particles in the UTLS. These particles typically reflect sunlight back into space and cool the Earth. GAMS will measure the altitudes and amounts of these particles by looking to the side of the spacecraft, through the thickness of Earth’s atmosphere, and provide detailed information about how particles are changing in the UTLS.</p><p>The goal of the Global Aerosol Measurement System (GAMS) project is to develop needed technologies and observation strategies to optimally measure the distributions and properties of particles in the upper troposphere and lower stratosphere (UTLS). The GAMS concept is based on the limb-scattering measurement techniques used on past sensors, most directly from the heritage of the Ozone Mapping and Profiling Suite (OMPS) Limb Profiler (LP) currently flying on board the Suomi National Polar-orbiting Partnership (NPP) spacecraft. OMPS-LP was launched on Suomi NPP in 2011, with the next planned launch of this instrument in 2022 on the next generation Joint Polar Satellite System-2 (JPSS-2). Because of the length of time between the NPP and JPSS-2 launches there is the potential for a significant data gap for these important measurements. The GAMS concept is intended to be a simple and low cost measurement system that could be ready to fill such a gap.</p><p> </p><p>The current OMPS-LP system measures light reflected by particles in the UTLS by looking behind the Suomi NPP path, looking through the thickness of Earth’s atmosphere (i.e., the limb). Although OMPS-LP has proven capable of detecting the presence of background particles in the UTLS, as well as particles from volcanic eruptions and meteorites entering Earth’s atmosphere from space, it has very limited spatial coverage and suffers from sensitivity issues since it preferentially sees particles in one direct with respect to the sun. GAMS seeks to overcome both limitations by making measurements of reflected light In two or more directions relative to the spacecraft flight. Because GAMS focuses only on the limb profiling capabilities (versus the more comprehensive but more complicated OMPS system) it can be contained in a relatively smaller spacecraft, which will reduce deployment costs. Additional increased spatial coverage can be realized by flying multiple copies of the GAMS instrument in different orbits.</p><p> </p><p>In this stage of the GAMS project we are working to develop capabilities for adding additional spectral channels to our detector system. We initially targeting 350 nm for altitude registration and 675 nm for aerosol detection. We are now developing an extension to include an additional channel at 1020 nm for aerosol detection. This channel will provide additional sensitivity to aerosol in the lower stratosphere, provides heritage overlap with other sensors (e.g., SAGE), and paired with the 675 nm channel provides additional information to recover other aspects of the aerosol distribution (e.g., particle size). We are additionally developing an observation simulator based on model output from the NASA Goddard Earth Observing System (GEOS-5) atmospheric model. This will allow us to prototype assimilation methodologies to ingest the eventual GAMS observations into aerosol prediction models.</p>
- API data.nasa.gov | Last Updated 2018-07-19T10:48:26.000Z
The proposed 45 nm radiation hardened platform based structured ASIC architecture offers the performance and density expected of a custom ASIC with the low manufacturing cost associated with a structured ASIC. The low cost, high performance customization of the structured ASIC portion of the chip is made possible by the 1-D 45 nm Mask-Lite process technology.