- API data.nasa.gov | Last Updated 2018-07-18T20:30:39.000Z
<p>Armstrong researchers have developed a networked instrumentation system that connects modern experimental payloads to existing analog and digital communications infrastructures. In airborne applications, this system enables a cost-effective, long-range, line-of-sight network link over the S and L frequency bands that supports data rates up to 10 megabits per second (Mbps) and a practically unlimited number of independent data streams. The resulting real-time payload link allows researchers to make in-flight adjustments to experimental parameters, increasing overall data quality and eliminating the need to repeat flights.</p><p><strong>Work to date</strong>: The team has developed and flight-tested the 10 Mbps bi-direction aircraft-to-ground, line-of-sight network. A follow-on project, Space-Based Range Demonstration and Certification (SBRDC) Flight Demonstration #2, involved integration of this system with a phased-array antenna and controller to provide a 10 Mbps over-the-horizon network downlink. This prototype system was further refined into a more operational system that provided the Airborne Research Test System (ARTS) aboard the Full-Scale Advanced Systems Testbed (FAST) access to thousands of parameters from the heavily instrumented aircraft. Engineers were able to view ARTS network data output in the control room, without replacing any aircraft instrumentation or ground equipment.&nbsp; Additionally, four streams of network data from onboard hot-film sensors was recorded onboard and transmitted to the control room.</p><p><strong>Looking ahead</strong>: Work has begun to design a new system that incorporates state-of-the-art transceiver technology. The new system is expected to allow a five-fold improvement in throughput, to 40 Mbps.</p><p><strong>Benefits</strong></p><ul><li><strong>Flexible</strong>: Expands the utility of existing airborne platforms with legacy communications systems by supporting state-of-the-art payloads that leverage current network technology</li><li><strong>Economical</strong>: Achieves a bi-directional, line-of-sight network without the need to replace existing communications infrastructure</li><li><strong>Flight efficient</strong>: With real-time control of experimental parameters, reduces the need for repeat flights</li></ul><p><strong>Applications</strong></p><ul><li>Secure local line-of-sight communications</li><li>Global space-based communications via satellite links</li></ul>
- API data.nasa.gov | Last Updated 2018-07-19T08:06:03.000Z
<p>Novel Processing Approach to Enable Hybrid Material System Designs for Turbine and Rocket Engines</p><p>Demonstrate feasibility of using electron beam melting (EBM) for a hybrid disk, where a state-of-the-art powder metallurgy alloy (LSHR) is bonded to single-crystal Ni-alloy (LDS).</p> <p>The successful completion of this effort will demonstrate that direct deposition is a viable technique to successfully fabricate hybrid components of two dissimilar materials that typically are bonded to create the final structure.</p><p>These type of dissimilar metal bonds is a technology that has yet to be demonstrated using additive manufacturing (AM). Only recently have monolithic advanced nickel-based superalloys AM builds been observed and reported in the literature. No known work has been published of satisfactory fabrication of even monolithic high strength powder metal disk alloys, which have been verified to be durable for rotating, fatigue-critical hardware. If successful, the work here would establish the proof-of-concept of an AM hybrid disk, as well as platform for the creation of new hybrid components.</p>
- API data.nasa.gov | Last Updated 2018-09-07T17:46:54.000Z
Scientific/Technical/Management Science Goals and Objectives: A major goal of the NASA planetary space program has been the search for life in our solar system. On Mars, this effort has been focused on the successful search for water and habitability. The next step will be searching specific locations for signs of past life. One of the most promising places are the hydrothermal sinter deposits in the Nili Patera caldera of the Syrtis Major volcano. These deposits would have been long-lived, with the suitable environmental conditions and provide a well-mapped feature for a targeted mission. To prepare for this type of mission, we propose a series of experiments and field operations to develop the required methodologies. Operating at an extinct hot spring deposit in a Martian analog and extreme life environment in Iceland, we will collect samples and in-situ measurements to determine the resolutions and data sets required to answer the key mission objectives. We will also test trafficability to determine the spacecraft capabilities required for mission success. The proposed advancements break down into the categories of Science, Science Operations and Technology. Science objectives will focus building on the extensive set of terrestrial literature to answer questions specific to this mission. For example, how do we identify all potential signs of life preserved in the sinters and how to sinters record signs of environmental and volcanic properties. Specific to this proposal will be to understand what spacecraft instruments will be required to answer these questions. Science Operations will focus on the suite of instruments needed to operate together to answer the mission goals and what type of samples and mobility will be required for success. The Technology section will be to develop the methods to meet the requirements determined by the science effort. This includes sample collection and handling methodology and determining a plan to develop currently available field instruments into planetary capable versions. Methodology: Dr. Skok will lead a diverse team of hydrothermal, biological and instrumental experts to study a comparable hot spring deposit in Iceland to examine all the potential mission issues and scenarios, along with sample requirements. A combination of lab analysis of collected samples and in-situ deployment of field instruments will be used to prepare for this future mission. Relevance to Planetary Science and Technology Through Analog Research: This proposal meets the stated PSTAR goal of funding projects to planetary analog sites to develop the technologies and methodologies required for future missions, especially to extreme environments. Hot spring environments are key habitats on Earth and provide a planetary independent energy source and habitable zone.
- API data.nasa.gov | Last Updated 2018-07-19T15:54:02.000Z
Automated detection of land cover changes between multitemporal images (i.e., images captured at different times) has long been a goal of the remote sensing discipline. Most technology in this area has focused on methods for detecting and identifying land cover or surface object changes in two or more images, but precise co-registration of images remains a key challenge. In fact, image-to-image registration and image-based change detection are intricately related, as the success of conducting both relies on the precision of the other; software that supports these functions should do so in an integrative manner. Image registration is the key factor influencing the success of detecting land cover changes at or near pixel scale. We will develop tools in the form of a "software development kit" (SDK) specifically optimized for precise co-registration of two or more images with minimal user interaction, with the primary motivation to enable change detection algorithms to focus on salient changes rather than highlight image registration errors. The SDK will be available to NASA at no cost, after which we will build user applications based on the SDK for commercial offering.
- API data.nasa.gov | Last Updated 2018-07-19T12:45:20.000Z
SSG Precision Optronics proposes the development and demonstration of a new optical fabrication process for the production of EUV quality Silicon Carbide (SiC) optics. The process combines three technologies to provide a cost and schedule effective solution for lightweight, thermally stable precision optics for EUV applications. First, near-net-shape cast SiC materials for monolithic lightweighted, SiC mirror substrates with minimal machining required. Second, a thin CVD SiC sputter deposition process applied to the mirror facesheet. This enables a low-scatter surface as well as high reflectance in the EUV band. Third, the application of Tinsley?s computer controlled optical surfacing (CCOS) grinding and polishing makes it possible to generate aspheres with extremely accurate surfaces. The manufacturing process proposed allows production of state-of-the-art SiC aspheric mirrors with numerous benefits compared to competing technologies and traditional processes: ?Excellent Surface Figure Accuracy (<0.01 waves RMS, over low and mid-spatial-frequency measurements); ?Ultra-low micro-roughness (<10 Angstroms RMS routine, <1 Angstrom RMS achievable); ?Improved yield; ?Very low areal densities (~10 kg/m2 at an aperture of 1 meter); ?Superior thermal stability (SiC bulk material properties); In Phase 2, SSGPO will demonstrate an optimized optical fabrication process by producing a SiC EUV flight-ready optic.
- API data.nasa.gov | Last Updated 2018-07-19T23:08:44.000Z
Microcosm has developed and qualified strong, all-composite LOX tanks for launch vehicles. Our new 42-inch diameter tank design weighs 486 lbs and burst without leaking at 2,125 psi, within 3.5% of the predicted burst pressure. This SBIR will analyze, design, build, and test much lighter weight all composite cryogenic tanks and examine, develop, and test alternative insulation techniques to minimize boil-off. This SBIR will also examine the reuse of propellant tanks as crew and storage habitats. During Phase I, we will design and fabricate 12 10-inch diameter and 2 25-inch diameter cryogenic tanks with a design burst pressure of approximately 850 psi. Eight of the 10-inch tanks and one 25-inch tank will be thermally cycled and burst tested using liquid nitrogen to obtain statistical data. The remaining 4 10-inch tanks will first be thermally cycled, then flushed out and re-pressurized with gaseous helium to simulate reuse as a crew habitat. The remaining 25-inch tank will be delivered to NASA for further testing. Phase II will fabricate, build, and test larger tanks and tanks specifically intended to meet the needs of future NASA programs, and alternative insulation approaches will be evaluated to minimize boil-off.
- API data.nasa.gov | Last Updated 2018-07-19T15:51:08.000Z
The innovation proposed here is a computational framework for high performance, high fidelity computational fluid dynamics (CFD) to enable accurate, fast and robust simulation of unsteady turbulent, reacting or non-reacting flows involving real or ideal fluids. This framework will provide a state-of-the-art unsteady turbulent flow simulation capability by laying the foundation for the incorporation of Hybrid RANS-LES (HRLES) methods which are a blend of Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches. This design and analysis tool will be built on a currently existing solver called Loci-STREAM which has been developed by the proposing firm under funding from NASA over the last four years. The work proposed here will result in a state-of-the-art design and analysis tool to enable the accurate modeling of small valves, turbopumps, combustion devices, etc. which constitute critical components of versatile space propulsion engines with deep throttling capability as part of NASA's Vision for Space Exploration Mission. Of particular relevance to NASA, this design and analysis tool will provide improved understanding and quantification of the time-varying, reacting flow environments in the thrust chamber assembly of space propulsion engines.
- API data.nasa.gov | Last Updated 2018-07-19T04:48:48.000Z
This data set contains Raw data taken by the New Horizons Student Dust Counter instrument during the Jupiter encounter mission phase.
- API data.nasa.gov | Last Updated 2018-07-19T09:03:03.000Z
This proposal addresses the need for miniature, narrow-linewidth, deep UV optical sources that operate at very low ambient temperatures for use in advanced in situ planetary science instruments for non-contact detection and classification of trace amounts of organic, inorganic, and biogenic materials using Raman and native fluorescence spectroscopic methods. The sources include aluminum gallium nitride semiconductor lasers and ultra-narrow-linewidth transverse excited hollow cathode lasers emitting between 210 nm to 250 nm, a spectral range with demonstrated higher detection sensitivity and specificity than sources emitting at longer wavelengths. Applications include non-contact robot-arm or body mounted chemical imaging instruments and detectors for direct analysis of trace levels of chemical species containing C, N, H, O, S, Cl, on surfaces or as extractions from soil, rock, or ice. We have achieved the highest recorded deep UV semiconductor internal quantum efficiencies at wavelengths below 250 nm. But continuing difficulties of attaining laser emission and prospects for narrow line-width compatible with Raman applications has caused us to redirect a significant portion of the Phase II effort to another class of deep UV laser with a more proven UV Raman track record and the potential for miniaturization for robot-arm-mounted applications.
- API data.nasa.gov | Last Updated 2018-07-19T20:13:54.000Z
Advanced Liquid Logic proposes to develop a very capable analyzer based on its digital microfluidic technology. Such an analyzer would be:  Capable of both simple and complex biological assays  Small, lightweight, power efficient, and easy to operate  Fully programmable and remotely reprogrammable Under NIH funding we have demonstrated clinical chemistry blood diagnostic testing on our lab-on-a-chip platform. Our vision is to develop a portable diagnostic analyzer that performs the same tests as central lab-based analytical equipment with even broader functionality by integrating hematology, pathology, molecular diagnostics, cytology, microbiology, and serology onto the same platform. These diverse tests would be multiplexed to use the same very small body fluid or solid sample. We believe that digital microfluidics is uniquely capable of meeting NASA's requirements because:  We will be able to address a larger breadth of tests than conventional microfluidics on even smaller sample volumes  Our technology miniaturizes both the assay and the associated equipment  Our droplet-based technology provides positive control of each droplet  Our lab-on-a-chip can be designed for multiple uses, reducing or eliminating the need for disposable components  Our platform could be integrated with implanted or automated minimally invasive sample extraction techniques