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The Godane Inbox
Jun 26, 2022 ConnorDawg
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I AM NOT MONKEY BRAIN! Today I will prove to you once and for all that I, Connor, am smarter than a monkey but not only that, I also possess the highest IQ known to mankind. Dare to challenge THE CDAWGVA??? Do the human benchmark yourself and post the results in the comments if you dare!!! Follow My Twitch: https://www.twitch.tv/cdawgva My Main YouTube: https://www.youtube.com/c/CDawgVA Twitter: http://bit.ly/2fG2i5n Facebook: https://www.facebook.com/CDawgVA/ Discord:...
Topics: Youtube, video, People & Blogs, cdawgva, CDawgVA Streams, CDawgVA Highlights, CDawgVA Stream...
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Jun 26, 2022 ConnorDawg
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Today, Connor, will be making friends in Apex Legends by only using my vast Japanese knowledge. What do you rate Connor's, CDawg's Japanese language skills with Japanese Gamers. Follow My Twitch: https://www.twitch.tv/cdawgva My Main YouTube: https://www.youtube.com/c/CDawgVA Twitter: http://bit.ly/2fG2i5n Facebook: https://www.facebook.com/CDawgVA/ Discord: https://discord.gg/cdawgva Instagram: http://bit.ly/2g1IZWM Video Edited By: https://twitter.com/MudanTV https://www.youtube.com/c/MudanTV...
Topics: Youtube, video, People & Blogs, cdawgva, CDawgVA Streams, CDawgVA Highlights, CDawgVA Stream...
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NASA's constellation of current missions provide several opportunities to apply satellite remote sensing observations to weather forecasting and disaster response applications. Examples include: Using NASA's Terra and Aqua MODIS, and the NASA/NOAA Suomi-NPP VIIRS missions to prepare weather forecasters for capabilities of GOES-R; Incorporating other NASA remote sensing assets for improving aspects of numerical weather prediction; Using NASA, NOAA, and international partner resources (e.g....
Topics: NASA Technical Reports Server (NTRS), 07d1becd432b43d9a0f4792b9f17af14,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), Molthan, Andrew, NASA Marshall Space Flight Center
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), 184ad215ae404000bdfc11acf1606742,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), 4343b629d3df414ca31ca14c6aab4011,...
Lightweight aircraft design has received a considerable attention in recent years as a means for improving cruise efficiency. Reducing aircraft weight results in lower lift requirements which directly translate into lower drag, hence reduced engine thrust requirements during cruise. The use of lightweight materials such as advanced composite materials has been adopted by airframe manufacturers in current and future aircraft. Modern lightweight materials can provide less structural rigidity...
Topics: NASA Technical Reports Server (NTRS), Boeing Research and Technology,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), Adams, Mitzi, NASA Marshall Space Flight Center
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Jun 26, 2022 ConnorDawg
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CDawgVA loves playing games even more than being a VTuber, check out how I demolish the pulls in this Genshin Impact Gatcha game. Yes, it's me, Connor! Follow My Twitch: https://www.twitch.tv/cdawgva My Main YouTube: https://www.youtube.com/c/CDawgVA Twitter: http://bit.ly/2fG2i5n Facebook: https://www.facebook.com/CDawgVA/ Discord: https://discord.gg/cdawgva Instagram: http://bit.ly/2g1IZWM Video Edited By: https://twitter.com/MudanTV https://www.youtube.com/c/MudanTV Amazon Affiliate Links (I...
Topics: Youtube, video, People & Blogs, cdawgva, CDawgVA Streams, CDawgVA Highlights, CDawgVA Stream...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Roman, Monsi
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Jun 26, 2022 ConnorDawg
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CDawgVA's VTuber Debut on Twitch. See the highlights of CDawgVA/Connor's Virtual YouTube Debut. Hololive sign me up already. Follow My Twitch: https://www.twitch.tv/cdawgva My Main YouTube: https://www.youtube.com/c/CDawgVA Twitter: http://bit.ly/2fG2i5n Facebook: https://www.facebook.com/CDawgVA/ Discord: https://discord.gg/cdawgva Instagram: http://bit.ly/2g1IZWM Video Edited By: https://twitter.com/MudanTV https://www.youtube.com/c/MudanTV Amazon Affiliate Links (I Get Commission if used):...
Topics: Youtube, video, People & Blogs, cdawgva, CDawgVA Streams, CDawgVA Highlights, CDawgVA Stream...
Investigating recent eruptions on Earth is crucial to improving understanding of relationships between eruption dynamics and final lava flow morphologies. In this study, we investigated eruptions in Holuhraun, Iceland, and Kilauea, Hawaii to gain insight into the lava dynamics near the source vent, the initiation of lava channels, and the origin of down-channel features. Insights are applied to Rima Bode on the lunar nearside to deduce the sequence of events that formed this lunar sinuous rille...
Topics: NASA Technical Reports Server (NTRS), 0d1025553f94404a993b0f635768a6b0,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 0e93804a729b402c8d0a0c9a6fb2b160,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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No abstract available
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Wilson-Hodge, Colleen A.
Magneto-inertial fusion concepts often use a pulsed high current discharge in a cylindrical coil to generate a rapidly changing axial magnetic field, inducing a counter-propagating current in the conducting outer liner of a centrally aligned cylindrical fusion target. The Lorentz force arising from the axial field and azimuthal liner current rapidly implodes the target radially inward, compressing the fuel to reach fusion conditions.
Topics: NASA Technical Reports Server (NTRS), 75ccdecd82d84af9b486f3ee07e36233,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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An overview of NASA's plant research for bioregenerative life support is given, reviewing much of the work conducted at NASA's Kennedy Space Center over the past 25 years.
Topics: NASA Technical Reports Server (NTRS), NASA Kennedy Space Center, Wheeler, Raymond M.
In order to fly an occulter in formation with a telescope at the Sun-Earth L2 (SEL2) Libration Point, one must have a detailed understanding of the dy-namics that govern the restricted three body system. For initial purposes, a linear approximation is satisfactory, but operations will require a high-fidelity modeling tool along with strategic targeting methods in order to be successful. This paper focuses on the challenging dynamics of the transfer trajectories to achieve the relative...
Topics: NASA Technical Reports Server (NTRS), 4f72aa9949c444868960c7a41b177ba1, Folta, David C., Greenbelt,...
In assessing the risk an asteroid may pose to the Earth, the asteroids state is often predicted for many years, often decades. Only by accounting for the asteroids initial state uncertainty can a measure of the risk be calculated. With the asteroids state uncertainty growing as a function of the initial velocity uncertainty, orbit velocity at the last state update, and the time from the last update to the epoch of interest, the asteroids position uncertainties can grow to many times the size of...
Topics: NASA Technical Reports Server (NTRS), Mattern, Daniel, Omitron, Inc.
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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An N+3 technology level engine, suitable as a propulsion system for an advanced single-aisle transport, was developed as a reference cycle for use in technology assessment and decision-making efforts. This reference engine serves three main purposes: it provides thermodynamic quantities at each major engine station, it provides overall propulsion system performance data for vehicle designers to use in their analyses, and it can be used for comparison against other proposed N+3 technology-level...
Topics: NASA Technical Reports Server (NTRS), 0bd3ac2d9cc04376b1c7fe329f76b3da,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), NASA Johnson Space Center, O'Hara, William J. IV
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Spacecraft control algorithms must know the expected vehicle response to any command to the available control effectors, such as reaction thrusters or torque devices. Spacecraft control system design approaches have traditionally relied on the estimated vehicle mass properties to determine the desired force and moment, as well as knowledge of the effector performance to efficiently control the spacecraft. A pattern recognition approach was used to investigate the relationship between the...
Topics: NASA Technical Reports Server (NTRS), Gambone, Elisabeth A., NASA Johnson Space Center
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Spacecraft control algorithms must know the expected spacecraft response to any command to the available control effectors, such as reaction thrusters or torque devices. Spacecraft control system design approaches have traditionally relied on the estimated vehicle mass properties to determine the desired force and moment, as well as knowledge of the effector performance to efficiently control the spacecraft. A pattern recognition approach can be used to investigate the relationship between the...
Topics: NASA Technical Reports Server (NTRS), Gambone, Elisabeth, NASA Johnson Space Center
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The Spaceflight Standard Measures is a NASA Johnson Space Center Human Research Project (HRP) project that proposes to collect a set of core measurements, representative of many of the human spaceflight risks, from astronauts before, during and after long-duration International Space Station (ISS) missions. The term \"standard measures\" is defined as a set of core measurements, including physiological, biochemical, psychosocial, cognitive, and functional, that are reliable, valid,...
Topics: NASA Technical Reports Server (NTRS), 8ba16c65fbac4cf786c9e6b802699c40, Cromwell, Ronita, Houston,...
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Image Detective 2.0 engages citizen scientists with NASA astronaut photography of the Earth obtained by crew members on the International Space Station (ISS). Engaged citizen scientists are helping to build a more comprehensive and searchable database by geolocating this imagery and contributing to new imagery collections. Image Detective 2.0 is the newest addition to the suite of citizen scientist projects available through CosmoQuest, an effort led by the Astronomical Society of the Pacific...
Topics: NASA Technical Reports Server (NTRS), 2ca23f1fd3ef425ebc87809358ba2f5f,...
Apatite [Ca5(PO4)3(F,Cl,OH)] is present in a wide range of planetary materials, and due to the presence of volatiles within its crystal structure (X-site), many recent studies have attempted to use apatite to constrain the volatile contents of planetary magmas and mantle sources [i.e., 1]. Experimental studies have investigated the apatite-melt partitioning behavior of F, Cl, and OH in basaltic systems [e.g., 2- 3], reporting that apatite-melt partitioning of volatiles is best described as...
Topics: NASA Technical Reports Server (NTRS), McCubbin, F. M., NASA Johnson Space Center
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The past decade has been one of geochemical, isotopic, and computational advances that are bringing the laboratory measurements and computational modeling neighborhoods of the Earth-Moon community to ever closer proximity. We are now however in the position to become even better neighbors: modelers can generate testable hypthotheses for geochemists; and geochemists can provide quantitive targets for modelers. Here we present a robust example of the latter based on Cl isotope measurements of...
Topics: NASA Technical Reports Server (NTRS), 29519810d1d84358b29eac3bcd7ca0f1,...
Introduction: Direct samples of early Solar System fluids are present in two thermally-metamorphosed ordinary chondrite regolith breccias (Monahans (1998) [H5] and Zag [H3-6]), which were found to contain brine-bearing halite (NaCl) crystals that have been added to the regolith of an S-type asteroid following asteroidal metamorphism [1, 2]. The brine-bearing halite grains were proposed to be formed on an icy C-type asteroids (possibly Ceres), and transferred to an S-type asteroid via...
Topics: NASA Technical Reports Server (NTRS), 08f2493a5ac04d5f88bed2db9f1af77d,...
Rover trade study: As summarized recently, mission simulations at Black Point Lava Flow (Arizona) that included realistic extravehicular activity (EVA) tasking, accurate traverse timelines, and an in-loop science CAPCOM (or SciCOM) showed that a small pressurized rover (SPR) was a better mobility asset than an unpressurized rover (UPR). Traverses within the SPR were easier on crew than spending an entire day in a spacesuit, enhancing crew productivity at each station. The SPR, named Lunar...
Topics: NASA Technical Reports Server (NTRS), 2455f15794e64ac6bba9685a2761dbf4,...
Exploration missions to Mars and other destinations raise many questions about the health of astronauts. The continuous exposure of astronauts to galactic cosmic rays is one of the main concerns for long-term missions. Cosmic ionizing radiations are composed of different ions of various charges and energies notably, highly charged energy (HZE) particles. The HZE particles have been shown to be more carcinogenic than low-LET radiation, suggesting the severity of chromosomal aberrations induced...
Topics: NASA Technical Reports Server (NTRS), 24433c6736254aefab5bee609160bf35,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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Global and regional dust storms on Mars have been observed from Earth-based telescopes, Mars orbiters, and surface rovers and landers. Dust storms can be global and regional. Dust is material that is suspended into the atmosphere by winds and has a particle size of 1-3 micrometer. Planetary scientist refer to loose unconsolidated materials at the surface as \"soil.\" The term ''soil'' is used here to denote any loose, unconsolidated material that can be distinguished from rocks,...
Topics: NASA Technical Reports Server (NTRS), 554ce3e60f524085be950ce701db6e31, Houston, TX, United States,...
The Linear Actuator System (LAS) is a major sub-system within the NASA Docking System (NDS). The NDS Block 1 will be used on the Boeing Crew Space Transportation (CST-100) system to achieve docking with the International Space Station. Critical functions in the Soft Capture aspect of docking are performed by the LAS. This paper describes the general function of the LAS, the system's key requirements and technical challenges, and the development and qualification approach for the system.
Topics: NASA Technical Reports Server (NTRS), 88dfb73a1a01452fa183385a0d6365cc,...
For over fifty years, NASA astronauts have taken exceptional photographs of the Earth from the unique vantage point of low Earth orbit (as well as from lunar orbit and surface of the Moon). The Crew Earth Observations (CEO) Facility is the NASA ISS payload supporting astronaut photography of the Earth surface and atmosphere. From aurora to mountain ranges, deltas, and cities, there are over two million images of the Earth's surface dating back to the Mercury missions in the early 1960s. The...
Topics: NASA Technical Reports Server (NTRS), 5bcab5c7b0e04d32b6e4d37b9fa957c8,...
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Every day, hundreds of images of Earth flood the Crew Earth Observations database as astronauts use hand held digital cameras to capture spectacular frames from the International Space Station. The variety of resolutions and perspectives provide a template for assessing land cover change over decades. We will focus on urban growth in the second fastest growing city in the nation, Houston, TX, using Object-Based Image Analysis. This research will contribute to the land change science community,...
Topics: NASA Technical Reports Server (NTRS), 704e1a57217348578c1624231759312c, Hollier, Andi, Houston, TX,...
Optical navigation of human spacecraft was proposed on Gemini and implemented successfully on Apollo as a means of autonomously operating the vehicle in the event of lost communication with controllers on Earth. It shares a history with the \"method of lunar distances\" that was used in the 18th century and gained some notoriety after its use by Captain James Cook during his 1768 Pacific voyage of the HMS Endeavor. The Orion emergency return system utilizing optical navigation has...
Topics: NASA Technical Reports Server (NTRS), 5e278df7620f4553945c66f404358480, D'Souza, Christopher N.,...
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Several diffusion experiments were conducted in a piston cylinder device across a range of oxygen fugacities (FMQ-3 FMQ-1.2, FMQ+6) at 1 GPa and 1300 C. This was done to explore the effects of oxygen fugacity (fO2) on diffusivity of redox sensitive trace elements. This allows investigation of how these elements diffuse across the fO2 range encountered in different reservoirs on planets and moons in our solar system. The University of Rochester LA-ICP-MS system was used for analysis of samples....
Topics: NASA Technical Reports Server (NTRS), 3a888b470e7e4fc0831a920c4e0fd92a,...
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Geochemical observations of the eucrite and diogenite meteorites, together with observations made by NASA's Dawn spacecraft, suggest that Vesta resembles H chondrites in bulk chemical composition, possibly with about 25% of a CM-chondrite like composition added in. For this model, the core is 15% by mass (or 8 volume %) of the asteroid. The abundances of moderately siderophile elements (Ni, Co, Mo, W, and P) in eucrites require that essentially all of the metallic phase in Vesta segregated to...
Topics: NASA Technical Reports Server (NTRS), 6f645e32999b4e4284d5ea9b0f10ff66, Houston, TX, United States,...
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Pasamonte is a clast-rich polymict basaltic breccia with O- and Cr-isotopic compositions that are resolved from those of most eucrites. It is dominated by two mafic clast types: (i) very-fine- to fine-grained, variolitic, subophitic and ophitic basalts, usually containing zoned pyroxenes; and (ii) fine- to medium grained hypidiomorphic-granular and allotriomorphic-granular microgabbros containing pyroxenes composed of augite lamellae in homogeneous pigeonite hosts. Minor clast types are...
Topics: NASA Technical Reports Server (NTRS), 20e229a4a9004b94a101924a2e0cf745, Berger, E. L.,...
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The mechanisms behind Antarctic meteorite concentrations remain enigmatic nearly 5 decades after the first recoveries, and much of the research in this direction has been based on anedcotal evidence. While these observations suggest many plausible processes that help explain Antarctic meteorite concentrations, the relative importance of these various processes (which can result in either an increase or decrease of specimens) is a critical component of any more robust model of how these...
Topics: NASA Technical Reports Server (NTRS), 7003c1a786f54c728629a40cdc22381a,...
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The Shape-Morphing Adaptive Radiator Technology (SMART) project builds off the FY16 research effort that developed a flexible composite radiator panel and demonstrated its ability to actuate from SMA's attached to it. The proposed FY17 Shape-Morphing Adaptive Radiator Technology (SMART) project's goal is to 1) develop a practical radiator design with shape memory alloys (SMAs) bonded to the radiator's panel, and 2) build a multi-panel radiator prototype for subsequent system level thermal...
Topics: NASA Technical Reports Server (NTRS), 02edfd3f835c42e8887e95e6ddf2caba,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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The Laser Processed Heat Exchanger project will investigate the use of laser processed surfaces to reduce mass and volume in liquid/liquid heat exchangers as well as the replacement of the harmful and problematic coatings of the Condensing Heat Exchangers (CHX). For this project, two scale unit test articles will be designed, manufactured, and tested. These two units are a high efficiency liquid/liquid HX and a high reliability CHX.
Topics: NASA Technical Reports Server (NTRS), Hansen, Scott, NASA Johnson Space Center
A liquid oxygen, liquid methane (LOX/LCH4) reaction control system (RCS) was tested at NASA Glenn Research Center's Plum Brook Station in the Spacecraft Propulsion Research Facility (B-2) under simulated altitude and thermal vacuum conditions. The RCS is a subsystem of the Integrated Cryogenic Propulsion Test Article (ICPTA) and was initially developed under Project Morpheus. Composed of two 28 lbf-thrust and two 7 lbf-thrust engines, the RCS is fed in parallel with the ICPTA main engine from...
Topics: NASA Technical Reports Server (NTRS), Atwell, Matthew J., c59c7931870a4609a364ef17a5284089,...
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The Major Constituent Analyzer (MCA) is a mass spectrometer based system that measures the major atmospheric constituents on the International Space Station. A number of limited-life components require periodic change-out, including the ORU 02 analyzer and the ORU 08 Verification Gas Assembly. The most recent ORU 02 and ORU 08 assemblies in the LAB MCA are operating nominally. For ORU 02, the ion source filaments and ion pump lifetime continue to be key determinants of MCA performance. Finally,...
Topics: NASA Technical Reports Server (NTRS), a1966a60e6ec4eb2882695ad1c997eac, Boeing Co., Charlotte, NC,...
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No abstract available
Topics: NASA Technical Reports Server (NTRS), ba45c06efd3445ffaa325080e5fe5c2f, Gaskin, Jessica A., Gelmis,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 422a518a0b854dea8fa6922694ab746a,...
NASAs current focus is on the Journey to Mars sometime around the mid-to-late 2030s. However, it is also supporting the development of commercial cargo and crew delivery to the ISS (e.g., SpaceX, Orbital Sciences, SNC, Boeing) where inflatable habitation technology (e.g., Bigelow Aerospaces BEAM) is currently being tested Significant private sector interest in commercial lunar activities has also been expressed by Bigelow Aerospace, Golden Spike Company, Shackleton Energy Company (SEC), and...
Topics: NASA Technical Reports Server (NTRS), 06e548d5043143e78eb0f34b30da5bd7,...
The European Space Agency (ESA) and their prime contractor Airbus Defense Space (ADS) are developing the European Service Module (ESM) for integration and utilization with other modules of NASAs Orion Multi-Purpose Crew Vehicle. As part of this development, ESA, ADS, NASA and the Lockheed Martin Company performed a series of reverberant acoustic tests in April-May 2016 on the ESM Structural Test Article (E-STA), the mechanical mock-up of the ESM designated for mechanical tests. Testing the...
Topics: NASA Technical Reports Server (NTRS), 0a9509c5b9614feeafc427a8fe92316d,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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Consistent validation of satellite CO2 estimates is a prerequisite for using multiple satellite CO2measurements for joint flux inversion and establishing a long-term atmospheric CO2 data record. Wevalidate recent satellite observation of OCO-2 v7 and ACOS-GOSAT v7.3 using similar analysis as previouswork (Kulawik et al. (2016) and Frankenberg et al. (2106)) through comparisons to the HIAPER Pole-to-Pole Observations (HIPPO) and the Total Carbon Column Observing Network (TCCON) to estimate...
Topics: NASA Technical Reports Server (NTRS), 0262c926ebcb4838a5ba9b517c6d96e0,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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Questions in data analysis involving the concepts of time and measurement are often pushed into the background or reserved for a philosophical discussion. Some examples are: a) Is causality a consequence of the laws of physics, or can the arrow of time be reversed? b) Can we determine the arrow of time of an event? c) Do we need the continuum hypothesis for the underlying function in any measurement process? d) Can we say anything about the analyticity of the underlying process of an event? e)...
Topics: NASA Technical Reports Server (NTRS), NASA Ames Research Center, Scargle, Jeffrey D.
One of the challenges of developing flight control systems for liquid-propelled space vehicles is ensuring stability and performance in the presence of parasitic minimally damped slosh dynamics in the liquid propellants. This can be especially difficult when the fundamental frequencies of the slosh motions are in proximity to the frequency used for vehicle control. The challenge is partially alleviated since the energy dissipation and effective damping in the slosh modes increases with...
Topics: NASA Technical Reports Server (NTRS), 4a97e933c630481e93dd7432001bf15d,...
Major hardware and software for NASA's Space Launch System (SLS) began rolling off assembly lines in 2016, setting the stage for critical testing in 2017 and the launch of a major new capability for deep space human exploration. SLS continues to pursue a 2018 first launch of Exploration Mission 1 (EM-1). At NASA's Michoud Assembly Facility near New Orleans, LA, Boeing completed welding of structural test and flight liquid hydrogen tanks, and engine sections. Test stands for core stage...
Topics: NASA Technical Reports Server (NTRS), 7c5a42a90fed428bad263b095ec7db63, Askins, Bruce, Huntsville,...
A Near Earth object impacting into Earth's atmosphere may produce damaging effects at the surface due to airblast, thermal pulse, or kinetic impact in the form of meteorites. At large sizes (greater than many tens of meters), the damage is amplified by the hypersonic impact of these large projectiles moving with cosmic velocity, leaving explosively produced craters. However, much more common is simple \"kinetic\" damage caused by the impact of smaller meteorites moving at terminal...
Topics: NASA Technical Reports Server (NTRS), 4e01bff993c04c81810f9fde4b7a2551, Brown, Peter,...
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The determination of asteroid bulk density is an important aspect of Near Earth Object (NEO) characterization. A fraction of meteoroids originate from asteroids (including some NEOs), thus in lieu of mutual perturbations, satellites, or expensive spacecraft missions, a study of meteoroid bulk densities can potentially provide useful insights into the densities of NEOs and PHOs (Potentially Hazardous Objects). Meteoroid bulk density is still inherently difficult to measure, and is most often...
Topics: NASA Technical Reports Server (NTRS), a8ecf03bd50541c282b3eb6c4c18bee7, Blaauw, R. C.,...
Within recent years, there has been an influx of companies around the world pursuing reusable systems for space flight. Much like NASA, many of these new entrants are learning that reusable systems are complex and difficult to acheive. For instance, in its first attempts to retrieve spaceflight hardware for future reuse, SpaceX unsuccessfully tried to land on a barge at sea, resulting in a crash-landing. As this new generation of launch developers continues to develop concepts for reusable...
Topics: NASA Technical Reports Server (NTRS), 3c7d706bf61e42d79b038963af2e92b2, Alabama Univ.,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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NASA Marshall Space Flight Center's Materials and Processes Department, with support from the Propulsion Systems Department, has renewed the development and maintenance of a hybrid test bed for exposing ablative thermal protection materials to an environment similar to that seen in solid rocket motors (SRM). The Solid Fuel Torch (SFT), operated during the Space Shuttle program, utilized gaseous oxygen for oxidizer and an aluminized hydroxyl-terminated polybutadiene (HTPB) fuel grain to expose a...
Topics: NASA Technical Reports Server (NTRS), Boyer, J. Eric, cb912854c7bb44f189a50d31af8c878c, Cortopassi,...
During the structural certification effort for the Space Launch System solid rocket booster nozzle, it was identified that no consistent method for addressing local negative margins of safety in non-metallic materials had been developed. Relevant areas included bond-line terminations and geometric features in the composite nozzle liners. In order to gain understanding, analog test specimens were designed that very closely mimic the conditions in the actual full scale hardware. Different...
Topics: NASA Technical Reports Server (NTRS), McCutcheon, David Matthew, NASA Marshall Space Flight Center
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Asbestos free solid motor internal insulation samples were recently tested at the MSFC Hyperthermal Arc Jet Facility. Objectives of the test were to gather data for solid rocket motor analog characterization of ablative and in-depth thermal performance of rubber materials subject to high enthalpy/pressure flow conditions. Tests were conducted over a range of convective heat fluxes for both inert and chemically reactive sub-sonic free stream gas flow. Active instrumentation included use of total...
Topics: NASA Technical Reports Server (NTRS), Clayton, J. Louie, NASA Marshall Space Flight Center
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An all-new sounding rocket was designed at NASA's Marshall Space Flight Center that featured an aft finocyl, aluminized solid propellant grain and silica-filled ethylene-propylene-diene monomer (SFEPDM) internal insulation. Upon the initial static firing of the first of this new design, the solid rocket motor (SRM) case failed thermally just upstream of the aft closure early in the burn time. Subsequent fluid modeling indicated that the high-velocity combustion-product jets emanating from the...
Topics: NASA Technical Reports Server (NTRS), Martin, Heath T., NASA Marshall Space Flight Center
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In thermo-ablative material modeling, as in many fields of analysis, the quality of the existing models significantly exceeds that of the experimental data required for their validation. In an effort to narrow this gap, a laboratory-scale internal insulation test bed was developed that exposes insulation samples to realistic solid rocket motor (SRM) internal environments while being instrumented to record real-time rates of both model inputs (i.e., chamber pressure, total surface heat flux, and...
Topics: NASA Technical Reports Server (NTRS), Martin, Heath T., NASA Marshall Space Flight Center
In a prior effort, a thermal/fluid model of the interior of Penn State University's laboratory-scale Insulation Test Motor (ITM) was constructed to predict both the convective and radiative heat transfer to the interior walls of the ITM with a minimum of empiricism. These predictions were then compared to values of total and radiative heat flux measured in a previous series of ITM test firings to assess the capabilities and shortcomings of the chosen modeling approach. Though the calculated...
Topics: NASA Technical Reports Server (NTRS), Martin, Heath T., NASA Marshall Space Flight Center
A comprehensive set of environment definitions is necessary from the beginning of the development of a spacecraft. The Cross-Program Design Specification for Natural Environments (DSNE, SLS-SPEC-159) was originally developed during the Constellation Program and then modified and matured for the Exploration Programs (Space Launch System and Orion). The DSNE includes launch, low-earth orbit, trans-lunar, cis-lunar, interplanetary, and entry/descent/landing environments developed from standard and...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Suggs, Rob
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Analytical Mechanics Associates (AMA), in cooperation with NASA Marshall Space Flight Center's (MSFC's) Spacecraft Propulsion Systems Branch, developed and tested a novel propellant tank design that employs an internal piston pressurized with an inert gas to expel propellant to thrusters. During the course of this activity, AMA designed, oversaw fabrication, and delivered to MSFC for testing, a piston propellant tank sized for 3U or larger CubeSats. MSFC conducted liquid expulsion testing using...
Topics: NASA Technical Reports Server (NTRS), 145f32cae8f84a94a908b3bf918631be,...
The Lightweight Integrated Solar Array and Transceiver (LISA-T) experiment consists of thin-film, low mass, low volume solar panels. Given the variety of thin solar cells and cover materials and the lack of environmental protection afforded by typical thick coverglasses, a series of tests were conducted in Marshall Space Flight Center's Space Environmental Effects Facility to evaluate the performance of these materials. Candidate thin polymeric films and nitinol wires used for deployment were...
Topics: NASA Technical Reports Server (NTRS), 1bfa0930eb0f4866af5ad551b1524289,...
The meteoroid environment is often divided conceptually into meteor showers plus a sporadic background component. The sporadic complex poses the bulk of the risk to spacecraft, but showers can produce significant short-term enhancements of the meteoroid flux. The Meteoroid Environment Office (MEO) has produced two environment models to handle these cases: the Meteoroid Engineering Model (MEM) and an annual meteor shower forecast. Both MEM and the forecast are used by multiple manned spaceflight...
Topics: NASA Technical Reports Server (NTRS), Moorhead, Althea V., NASA Marshall Space Flight Center
A data driven, near photospheric, 3 D, non-force free magnetohydrodynamic model pre- dicts time series of the complete current density, and the resistive heating rate Q at the photosphere in neutral line regions (NLRs) of 14 active regions (ARs). The model is driven by time series of the magnetic field B observed by the Helioseismic & Magnetic Imager on the Solar Dynamics Observatory (SDO) satellite. Spurious Doppler periods due to SDO orbital motion are filtered out of the time series for...
Topics: NASA Technical Reports Server (NTRS), 30ee83f09a6e49bb91a99f7bd2f3df21,...
High voltage solar array interactions with the space environment can have a significant impact on array performance and spacecraft charging. Over the past 10 years, data from the International Space Station has allowed for detailed observations of these interactions over long periods of time. Some of the surprising observations have been floating potential transients, which were not expected and are not reproduced by existing models. In order to understand the underlying processes producing...
Topics: NASA Technical Reports Server (NTRS), 27d3dbecf713460aa64c0ea973db52e7, Alabama Univ., Huntsville,...
The Venus Global Reference Atmospheric Model (Venus-GRAM) was originally developed in 2004 under funding from NASA's In Space Propulsion (ISP) Aerocapture Project to support mission studies at the planet. Many proposals, including NASA New Frontiers and Discovery, as well as other studies have used Venus-GRAM to design missions and assess system robustness. After Venus-GRAM's release in 2005, several missions to Venus have generated a wealth of additional atmospheric data, yet few model updates...
Topics: NASA Technical Reports Server (NTRS), 384583aaee534bf9901e81f207feff9e, Dwyer Cianciolo, A. M.,...
The Natural Environments Branch of the Engineering Directorate at Marshall Space Flight Center (MSFC) provides solar cycle forecasts for NASA space flight programs and the aerospace community. These forecasts provide future statistical estimates of sunspot number, solar radio 10.7 cm flux (F10.7), and the geomagnetic planetary index, Ap, for input to various space environment models. For example, many thermosphere density computer models used in spacecraft operations, orbital lifetime analysis,...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Suggs, Ron
The magnetic storm that commenced on June 22, 2015 was one of the largest storms in the current solar cycle. During this event, ionospheric F-region density measurements from the Floating Potential Measurement Unit (FPMU) on board the International Space Station (ISS) show dramatic depletions in the post-sunset (nighttime) local time sector at equatorial latitudes starting in the main phase of the storm and persisting on several subsequent orbits into the next day. Putting these low-latitude...
Topics: NASA Technical Reports Server (NTRS), 68d71d5f713b4c579cc3b50d1a793611,...
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The life support systems on the International Space Station (ISS) are the culmination of an extensive effort encompassing development, design, and test to provide the highest possible confidence in their operation on ISS. Many years of development testing are initially performed to identify the optimum technology and the optimum operational approach. The success of this development program depends on the accuracy of the system interfaces. The critical interfaces include the specific operational...
Topics: NASA Technical Reports Server (NTRS), Carter, Layne, NASA Marshall Space Flight Center
Significant hardware and software for NASA's Space Launch System (SLS) began rolling off assembly lines in 2016, setting the stage for critical testing in 2017 and the launch of new capability for deep-space human exploration. (Figure 1) At NASA's Michoud Assembly Facility (MAF) near New Orleans, LA, full-scale test articles are being joined by flight hardware. Structural test stands are nearing completion at NASA's Marshall Space Flight Center (MSFC), Huntsville, AL. An SLS booster solid...
Topics: NASA Technical Reports Server (NTRS), Askins, Bruce R., ffeacae488f043258004eb543fe17120,...
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Jun 26, 2022 NASA Technical Reports Server (NTRS)
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Building a parametric cost model is hard work. The data is noisy and often does not behave like we want it to. We need statistics to give us an indication of the goodness of our models, but; statistics can be manipulated and mislead. On top of all of that, our own very human biases can lead us astray; causing us to see patterns in the noise and draw false conclusions from the data. Yet, it is the data itself that is the foundation for making better cost estimates and cost models. I believe the...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Prince, Frank A.
The Low Cost Upper Stage Propulsion project has successfully developed and matured Selective Laser Melting (SLM) Fabrication of the NASA developed GRCop-84 copper alloy.
Topics: NASA Technical Reports Server (NTRS), 969e3cc15a0a46f588e7596519260eb3, Gradl, Paul, Huntsville,...
INTRODUCTION: The meteoroid environment is often divided conceptually into meteor showers and the sporadic meteor background. It is commonly but incorrectly assumed that meteoroid impacts primarily occur during meteor showers; instead, the vast majority of hazardous meteoroids belong to the sporadic complex. Unlike meteor showers, which persist for a few hours to a few weeks, sporadic meteoroids impact the Earth's atmosphere and spacecraft throughout the year. The Meteoroid Environment Office...
Topics: NASA Technical Reports Server (NTRS), Moorhead, Althea V., NASA Marshall Space Flight Center
No abstract available
Topics: NASA Technical Reports Server (NTRS), 16fa939c86ad47ffa040e56641081ed7,...
There are many flare forecasting models. For an excellent review and comparison of some of them see Barnes et al. (2016). All these models are successful to some degree, but there is a need for better models. We claim the most successful models explicitly or implicitly base their forecasts on various estimates of components of the photospheric current density J, based on observations of the photospheric magnetic field B. However, none of the models we are aware of compute the complete J. We...
Topics: NASA Technical Reports Server (NTRS), 468cf654cffa46ddb956716410bf4fa8,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), bf87a1ae20744628a94835df2a5d2ef1, Dwyer Cianciolo, Alicia M.,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Suggs, Rob
Software Defined Radio is an industry term describing a method of utilizing a minimum amount of Radio Frequency (RF)/analog electronics before digitization takes place. Upon digitization all other functions are performed in software/firmware. There are as many different types of SDRs as there are data systems. Software Defined Radio (SDR) technology has been proven in the commercial sector since the early 90's. Today's rapid advancement in mobile telephone reliability and power management...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Sims, William H.
At NASA, the first steps of the Journey to Mars are well underway with the development of NASA's next generation launch system and investments in research and technologies that should increase the affordability, capability, and safety of exploration activities. Additive Manufacturing presents a disruptive opportunity for NASA to design and manufacture hardware with new materials at dramatically reduced cost and schedule. Opportunities to incorporate additive manufacturing align very well with...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Vickers, John
The Lightweight Integrated Solar Array and Transceiver (LISA-T) experiment consists of thin-film, low mass, low volume solar panels. Given the variety of thin solar cells and cover materials and the lack of environmental protection typically afforded by thick coverglasses, a series of tests were conducted in Marshall Space Flight Center's Space Environmental Effects Facility to evaluate the performance of these materials. Candidate thin polymeric films and nitinol wires used for deployment were...
Topics: NASA Technical Reports Server (NTRS), 06d3baec3ea44dc3a4a677c1b7cfcbea,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 0b1251a632d8467a83e67664c1c50225,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 1d79200a28ca41e9add2c0f8295ea827,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 5a949ecedfc047e8b05297a8aacd3e1a,...
Recently proposed modifications to ASTM E399 would provide a new size-insensitive approach to analyzing the force-displacement test record. The proposed size-insensitive linear-elastic fracture toughness, KIsi, targets a consistent 0.5mm crack extension for all specimen sizes by using an offset secant that is a function of the specimen ligament length. The KIsi evaluation also removes the Pmax/PQ criterion and increases the allowable specimen deformation. These latter two changes allow more...
Topics: NASA Technical Reports Server (NTRS), 7efc0d86540249ed88db158099ad99bf, Allen, Phillip, Arconic...
The proposed size-independent linear-elastic fracture toughness, K (sub Isi), for potential inclusion in ASTM E399 targets a consistent 0.5 millimeters crack extension for all specimen sizes through an offset secant that is a function of the specimen ligament length. The K (sub Isi) method also includes an increase in allowable deformation, and the removal of the P (sub max)/P (sub Q) criterion. A finite element study of the K (sub Isi) test method confirms the viability of the increased...
Topics: NASA Technical Reports Server (NTRS), 0097eef65b74464681343fdb855a445d,...
Comparing the natural meteorite flux at the Earth's surface to that of space debris, reentering debris is approx. 2 orders of magnitude less of a kinetic hazard at all but the very largest (and therefore rarest) sizes compared to natural impactors. Debris re-entries over several metric tonnes are roughly as frequent as natural impactors, but the survival fraction is expected to be much higher. Kinetic hazards from meteorites are very small, with only one recorded (indirect) injury reported. We...
Topics: NASA Technical Reports Server (NTRS), a85a777db54642d88580ad2054467a64, Brown, P., Cooke, W.,...
A comprehensive set of environment definitions is necessary from the beginning of the development of a spacecraft. The Cross-Program Design Specification for Natural Environments (DSNE, SLS-SPEC-159) was originally developed during the Constellation Program and then modified and matured for the Exploration Programs (Space Launch System and Orion). The DSNE includes launch, low-earth orbit (LEO), trans-lunar, cislunar, interplanetary, and entry/descent/landing environments developed from...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Suggs, Robert M.
The purpose of this Space Launch System (SLS) Mission Planner's Guide (MPG) is to provide future payload developers/users with sufficient insight to support preliminary SLS mission planning. Consequently, this SLS MPG is not intended to be a payload requirements document; rather, it organizes and details SLS interfaces/accommodations in a manner similar to that of current Expendable Launch Vehicle (ELV) user guides to support early feasibility assessment. Like ELV Programs, once approved to fly...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Smith, David Alan
Initial results from the PIC simulation and the LEM simulation have been presented. The PIC simulation results show that more detailed study is required to refine the ISS solar array current collection model and to understand the development of the current collection in time. The initial results from the LEM demonstrate that is it possible the transients are caused by solar array interaction with the environment, but there are presently too many assumptions in the model to be certain. Continued...
Topics: NASA Technical Reports Server (NTRS), 6fbdd20be32640f7b6f82bcdb7f37074, Alabama Univ., Huntsville,...
Harnessing the power of the solar wind, an Electric Sail, or E-sail, is a relatively new concept that promises to deliver high speed propellant-less propulsion. The electric sail is an invention made in 2006 at the Kumpula Space Centre in Finland by Pekka Janhunen [Janhunen and Sandroos, 2007]. At its core, an electric sail utilizes multiple positively biased tethers which exchange momentum with solar wind protons via the repelling electric field established around each tether, in other words,...
Topics: NASA Technical Reports Server (NTRS), 0ea15f7cd3f348c38a9e79f80ef4d011,...
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No abstract available
Topics: NASA Technical Reports Server (NTRS), 0d10e21373d24cafbc7fa2577374bc40, Huntsville, AL, United...
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NASA needed a lower mass, reliable, and safe medium for energy storage for ground-based and space applications. Existing industry electrochemical systems are limited in weight, charge rate, energy density, reliability, and safety. We chose a ceramic perovskite material for development, due to its high inherent dielectric properties, long history of use in the capacitor industry, and the safety of a solid state material.
Topics: NASA Technical Reports Server (NTRS), Hill, Curtis W., Jacobs Engineering and Science Services and...
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Determination of asteroid bulk density is an important aspect of NEO characterization, yet difficult to measure. As a fraction of meteoroids originate from asteroids (including some NEOs), a study of meteoroid bulk densities can potentially provide useful insights into the densities of NEOs and PHOs in lieu of mutual perturbations, satellite, or expensive spacecraft missions. NASA's Meteoroid Environment Office characterizes the meteoroid environment for the purpose of spacecraft risk and...
Topics: NASA Technical Reports Server (NTRS), 0268046f527e443aabe9a5162c2e007e,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), Moorhead, Althea, NASA Marshall Space Flight Center
Historically, NASA's Marshall Space Flight Center (MSFC) has operated a Solar Wind Facility (SWF) to provide long term particle and photon exposure to material samples. The requirements on the particle beam details were not stringent as the cumulative fluence level is the test goal. Motivated by development of the faraday cup instrument on the NASA Solar Probe Plus (SPP) mission, the MSFC SWF has been upgraded to included high fidelity particle beams providing broadbeam ions, broadbeam...
Topics: NASA Technical Reports Server (NTRS), 32a389391a474080a732dcfc7f64f6da,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 85914b8e050d4aa7b209627e2085a18e, Askins, Bruce, Huntsville,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), 17f6f63c503e4bfe993dc691692f25f6,...
The MSAFE model provides forecasts for the solar indices SSN, F10.7, and Ap. These solar indices are used as inputs to many space environment models used in orbital spacecraft operations and space mission analysis. Forecasts from the MSAFE model are provided on the MSFC Natural Environments Branch's solar webpage and are updated as new monthly observations come available. The MSAFE prediction routine employs a statistical technique that calculates deviations of past solar cycles from the mean...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Suggs, Ronnie J.
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The purpose of this document is to provide an overview of instrumentation discussed at the Meteorological Interface Control Working Group (MSICWG), a reference for data formats currently used by members of the group, a summary of proposed formats for future use by the group, an overview of the data networks of the group's members. This document will be updated as new systems are introduced, old systems are retired, and when the MSICWG community necessitates a change to the formats. The MSICWG...
Topics: NASA Technical Reports Server (NTRS), b2da9d1d439843e49fd43d5fa1711023, Brenton, James, Huntsville,...
Software Defined Radio (SDR) technology has been proven in the commercial sector since the early 90's. Today's rapid advancement in mobile telephone reliability and power management capabilities exemplifies the effectiveness of the SDR technology for the modern communications market. SDR technology offers potential to revolutionize satellite transponder technology by increasing science data through-put capability by at least an order of magnitude. While the SDR is adaptive in nature and is...
Topics: NASA Technical Reports Server (NTRS), NASA Marshall Space Flight Center, Sims, Herb