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Found 22 entries in the Bibliography.
Showing entries from 1 through 22
| 2019 |
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Given increasing complexity of many safety-critical systems, many organizations like NASA need to identify when, where, and how inappropriate perceptions of risk and anchoring of trust affect technology development and acceptance, primarily from the perspective of engineers and related management. Using the adoption of Dynamic Radioisotope Power Systems (RPS) for space exploration as a backdrop, we define and explain factors that contribute to inappropriate risk perception of various stakeholders. Three case studies (Mars Sc ... Brummel, Scott; Ostdiek, Paul; Woerner, Dave; Hibbard, Kenneth; Stofan, Ellen; Zakrajsek, June; Cummings, Mary; Published by: IEEE Aerospace Conference Proceedings Published on: YEAR: 2019 DOI: 10.1109/AERO.2019.8742171 Budget control; Martian surface analysis; NASA; Nuclear batteries; Planning; Probes; Radioisotopes; Safety engineering; Solar energy; Space flight; Parker Engineering |
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Execution of Parker solar probe s unprecedented flight to the sun and early results Parker Solar Probe (PSP) was launched on August 12, 2018, on its way to enter the solar corona and "touch" the Sun for the first time. We utilize enormous planetary gravity assists from 7 repeated Venus flybys via a V7GA trajectory in 24 solar orbits over 7 years, to get within 8.86 solar radii from the Sun s surface. The probe successfully entered the V7GA trajectory and made the first Venus flyby only 52 days after launch. Five weeks later it flew by the Sun at a perihelion distance of 0.166 AU and fl ... Guo, Yanping; Thompson, Paul; Wirzburger, John; Pinkine, Nick; Bushman, Stewart; Goodson, Troy; Haw, Rob; Hudson, James; Jones, Drew; Kijewski, Seth; Lathrop, Brian; Lau, Eunice; Mottinger, Neil; Ryne, Mark; Shyong, Wen-Jong; Valerino, Powtawche; Whittenburg, Karl; Published by: Proceedings of the International Astronautical Congress, IAC Published on: Interplanetary flight; Navigation; Orbits; Space flight; Parker Engineering |
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Charting a course to the sun: Flight path control for parker solar probe The successful launch of the Parker Solar Probe (PSP) on August 12, 2018 with a Delta IV rocket and Star-48BV third stage has placed the spacecraft on a 7-year trajectory to study the Sun. The goals of PSP are to better characterize our solar environment and advance our understanding of the Sun at 9.86 Rs. A total of 42 trajectory correction maneuvers are planned. This paper documents trajectory correction maneuver analysis performed just prior to launch until just past the first solar encounter. The pre-launch analysis culm ... Valerino, Powtawche; Thompson, Paul; Jones, Drew; Goodson, Troy; R., Haw; E., Lau; N., Mottinger; M., Ryne; Published by: Advances in the Astronautical Sciences Published on: |
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Design, fabrication, test, launch, and early operation of the parker solar probe propulsion system The Parker Solar Probe (PSP) spacecraft, part of NASA’s Living With a Star program, launched on 12 August 2018, atop a Delta IV Heavy launch vehicle with a STAR-48BV upper stage. As NASA’s mission to "touch the Sun," Parker Solar Probe will fly within 3.83 million miles of the Sun and will spend its lifetime studying the gaseous envelope surrounding it: the corona. Over the seven-year mission, PSP will orbit the Sun 24 times and utilize seven Venus fly-bys to gradually shrink its orbit around the Sun. The spacecr ... Kijewski, Seth; Bushman, Stewart; Published by: Published on: Automobile manufacture; Fabrication; Launch vehicles; NASA; Nitrogen compounds; Orbits; Probes; Rockets; Space flight; Stars; Parker Engineering |
| 2018 |
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An integrated quad-band RF front end for high-reliability small satellite missions As ever-increasing demand for lower size, weight, and power (SWaP) and small satellite platforms continues, it drives development in all sectors, including high-reliability and deep-space technologies. In order to meet these demands, JHU/APL is working to evolve its flight-proven, low-SWaP Frontier Radio (FR) [1] system into even smaller, more efficient, and yet more powerful designs. The Frontier Radio has already successfully flown an S-band version on NASA s Van Allen Probes (VAP) mission, and an X/Ka-band version will la ... Neill, Michael; Ramirez, Joshua; Published by: IEEE Aerospace Conference Proceedings Published on: APL (programming language); Earth (planet); NASA; Orbits; Probes; Space flight; Space platforms; Parker Engineering |
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Thermal design verification testing of the solar array cooling system for Parker solar probe Parker Solar Probe (PSP) will explore the inner region of the heliosphere through in situ and remote sensing observations of the magnetic field, plasma, and accelerated particles. PSP will travel closer to the sun (9.86 solar radii [(R Ercol, Carl; Abel, Elisabeth; Holtzman, Allan; Wallis, Eric; Published by: 30th Space Simulation Conference: Mission Success Through Testing of Critical Challenges Published on: Cooling systems; magnetic fields; Magnetoplasma; Orbits; Probes; Remote sensing; Solar cell arrays; Space flight; Thermoelectric equipment; Parker Engineering |
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The techniques for stray light analysis, optimization and testing are described for two space telescopes that observe the solar corona: the Solar Orbiter Heliospheric Imager (SoloHI) that will fly on the ESA Solar Orbiter (SolO), and the Wide Field Imager for Solar Probe (WISPR) that will fly on the NASA Parker Solar Probe (PSP) mission. Imaging the solar corona is challenging, because the corona is six orders of magnitude dimmer than the Sun surface at the limb, and the coronal brightness continues to decrease to ten orders ... Thernisien, Arnaud; Howard, Russell; Korendyke, Clarence; Carter, Tim; Chua, Damien; Plunkett, Simon; Published by: Proceedings of SPIE - The International Society for Optical Engineering Published on: Diffraction; Heat shielding; Image analysis; Millimeter waves; NASA; Optical coatings; Orbits; Probes; Ray tracing; Solar cell arrays; Solar radiation; Space flight; Space telescopes; Spacecraft; Parker Engineering |
| 2017 |
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In 2012, The Johns Hopkins Applied Physics Laboratory (APL) was approved by the National Aeronautics and Space Administration (NASA) to move forward with Phase B of the Solar Probe Plus (SPP) Mission to design and build the first spacecraft to fly into the Sun s outer atmosphere and study its effects on planetary systems and human activities. While APL had successfully utilized its earned value management system (EVMS) on the Van Allen Probes mission, the SPP contract called for a "certified" EVMS, which required an in-depth ... Liggett, William; Hunter, Howard; Jones, Matthew; Published by: IEEE Aerospace Conference Proceedings Published on: Budget control; Compliance control; Contractors; Human resource management; Man machine systems; NASA; Network security; Personnel training; Probes; Project management; Space flight; Value engineering; Parker Engineering |
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Agile methodology for spacecraft ground software development: A cultural shift In the Space Exploration Sector (SES) at Johns Hopkins University Applied Physics Laboratory (JHU/APL) the development of Mission Operations Ground Software (GSW) to support NASA and Department of Defense spacecraft missions has traditionally followed the incremental build methodology. As part of our continuous process improvement effort, the Agile methodology is being introduced as an alternative approach to software development. To meet the needs of sponsor requirements and satisfy our quality management processes a tailor ... Wortman, Kristin; Duncan, Brian; Melin, Eric; Published by: IEEE Aerospace Conference Proceedings Published on: Computer software; NASA; Quality management; Space flight; Spacecraft; Parker Engineering |
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The radio frequency telecommunications system for the NASA Europa clipper mission The NASA Europa Clipper mission, a partnership between the California Institute of Technology Jet Propulsion Laboratory (JPL) and the Johns Hopkins University Applied Physics Laboratory (APL), is currently in Phase B and scheduled for launch in 2022. A Jupiter orbiter, it will perform repeated flybys of the moon, Europa, to assess the icy moon’s structure and habitability. The spacecraft’s dual X/Ka-band radio frequency telecommunications subsystem has five primary functions: Provide spacecraft command capability ... Srinivasan, Dipak; Angert, Matthew; Ballarotto, Mihaela; Berman, Simmie; Bray, Matthew; Garvey, Robert; Hahne, Devin; Haskins, Chris; Porter, Jamie; Schulze, Ron; Scott, Chris; Sharma, Avinash; Sheldon, Colin; Published by: Proceedings of the International Astronautical Congress, IAC Published on: Data handling; Earth (planet); Microwave antennas; NASA; Orbits; Propulsion; Radio navigation; Radio waves; Space flight; Telecommunication; Traveling wave tubes; Parker Engineering |
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Initial attitude control challenges for the solar probe plus spacecraft The Solar Probe Plus (SPP) mission plans to launch a spacecraft to explore the Sun in 2018. Attitude control is maintained with a 3-axis stabilized, closed-loop control system. One of the first tasks for this system is acquiring attitude knowledge and establishing attitude control after separation from the launch vehicle. Once control is established, the spacecraft must be moved through a sequence of attitudes to meet power and thermal constraints and reach a powerpositive state. This paper describes the options selected for ... Vaughan, Robin; Shaughnessy, Daniel; Wirzburger, John; Published by: Advances in the Astronautical Sciences Published on: Attitude control; Flight control systems; Probes; Space flight; Parker Engineering |
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Full scale thermal simulator development for the solar probe plus thermal protection system Solar Probe Plus (SPP) is a NASA mission that will go within ten Solar Radii of the sun. One of the crucial technologies in this system is the Thermal Protection System (TPS), which shields the spacecraft from the sun. The TPS is made up of carbon-foam sandwiched between two carbon-carbon panels, and is approximately eight feet in diameter and 4.5 inches thick. At its closest approach, the front surface of the TPS is expected to reach 1200°C, but the foam will dissipate the heat so the back surface will only be about 300 ... Heisler, Elizabeth; Abel, Elisabeth; Congdon, Elizabeth; Eby, Daniel; Published by: IEEE Aerospace Conference Proceedings Published on: Aluminum coated steel; Carbon; Foams; Heat shielding; NASA; Probes; Simulators; Space flight; Stainless steel; Thermal insulating materials; Thermoanalysis; Vacuum technology; Parker Engineering |
| 2016 |
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Solar probe plus (SPP) power system electronics The Solar Probe Plus mission, under NASA’s Living With a Star Program, will fly a spacecraft (S/C) through the sun’s outer corona with orbit perihelia that gradually approach as close as 9.86 solar radii from the center of the sun. The mission will gather data on the processes of coronal heating, solar wind acceleration and production, and evolution and transport of solar energetic particles. The S/C is powered by two actively cooled photovoltaic solar array (S/A) wings. A novel power system electronics (PSE) box ... Baisden, Carson; Frankford, David; Published by: 14th International Energy Conversion Engineering Conference, 2016 Published on: Digital control systems; Electric power transmission; NASA; Orbits; Probes; Solar cell arrays; Space flight; Parker Engineering |
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Solar Probe Plus (SPP) Wrap Around Automated Testing The Solar Probe Plus (SPP) mission, under NASA s Living with a Star program, will fly a spacecraft (S/C) through the sun s outer corona. The mission will gather data on the processes of coronal heating, solar wind acceleration, and production, evolution and transport of solar energetic particles. The spacecraft has an Electrical Power System or EPS that has to undergo testing before delivery to the spacecraft for integration and testing. The specific unit to be delivered is called the Power System Electronic box or PSE. The ... Published by: AUTOTESTCON (Proceedings) Published on: Automation; Digital signal processors; Electric batteries; Electric power systems; Engines; Environmental testing; NASA; Probes; signal processing; Solar cell arrays; Space flight; Spacecraft; Spacecraft power supplies; Telemetering equipment; Testbeds; Wings; Parker Engineering |
| 2014 |
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Solar probe plus (SPP) dynamic solar array simulator The Solar Probe Plus (SPP) mission, under NASA’s Living With a Star program, will fly a spacecraft (S/C) through the sun’s outer corona with orbit perihelia that gradually approach as close as 9.86 solar radii from the center of the sun. The mission will gather data on the processes of coronal heating, solar wind acceleration, and production, evolution, and transport of solar energetic particles. The S/C is powered by two actively cooled photovoltaic solar array (S/A) wings. Because of the extreme environments ne ... Published by: 12th International Energy Conversion Engineering Conference, IECEC 2014 Published on: Attitude control; Control theory; Digital signal processors; Electric power systems; Flight control systems; MATLAB; NASA; Orbits; Probes; signal processing; Simulators; Software testing; Solar cell arrays; Space flight; Spacecraft power supplies; Vibrations (mechanical); Wings; Parker Engineering |
| 2013 |
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Modeling the near-sun environment for the Solar Probe Plus Guidance and Control system The Solar Probe Plus (SPP) mission is the culmination of decades of studies on spacecraft designed to explore the inner region of the heliosphere. The mission is being implemented by the Johns Hopkins University Applied Physics Laboratory for a 2018 launch. Building on the flight experiences of the Helios (NASA/FRG) and MESSENGER (NASA/JHUAPL) spacecraft and several remote studies, SPP will be the closest operating spacecraft to the Sun, even surpassing the 2017 planned launch of the Solar Orbiter (ESA/NASA) spacecraft. At a ... Wirzburger, John; Vaughan, Robin; Shapiro, Hongxing; Published by: AIAA Guidance, Navigation, and Control (GNC) Conference Published on: dynamics; Flight control systems; NASA; Probes; Space flight; Spacecraft; Parker Engineering |
| 2012 |
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Solar Probe Plus (SPP) autonomous solar array angle control The Solar Probe Plus mission, under NASA s Living with a Star program, will fly a spacecraft (S/C) through the sun s outer corona with orbit perihelia that gradually approach as close as 9.5 solar radii from the center of the sun. The mission will gather data on the processes of coronal heating, solar wind acceleration, and production, evolution and transport of solar energetic particles. The S/C is powered by two actively cooled photovoltaic solar array (S/A) wings. Due to the extreme environments near the sun, the S/C body ... Baisden, Carson; Roufberg, Lew; Published by: 10th Annual International Energy Conversion Engineering Conference, IECEC 2012 Published on: Attitude control; NASA; Orbits; Probes; Solar cell arrays; Space flight; Vibrations (mechanical); Parker Engineering |
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Solar Probe Plus (SPP) spacecraft power system The Solar Probe Plus (SPP) mission, under NASA s Living with a Star program, will fly a spacecraft (S/C) through the sun s outer corona with orbit perihelia that gradually approach as close as 9.5 solar radii from the center of the sun. The mission will gather data on the processes of coronal heating, solar wind acceleration, and the production, evolution and transport of solar energetic particles. The S/C is powered by two actively cooled photovoltaic solar array (S/A) wings. Due to the extreme environments near the sun, th ... Roufberg, Lew; Baisden, Carson; Published by: 10th Annual International Energy Conversion Engineering Conference, IECEC 2012 Published on: Battery management systems; Charging (batteries); Electric power system control; NASA; Orbits; Probes; Secondary batteries; Solar cell arrays; Space flight; Parker Engineering |
| 2011 |
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Array-design considerations for the solar probe plus mission The NASA Solar Probe Plus (SPP) mission will fly into and study the Sun s corona, reaching as close as 8.5 solar radii from the surface of the Sun. Power generation for the spacecraft will be provided by two solar array wings, which are being designed and built by Johns Hopkins University Applied Physics Laboratory and Emcore Photovoltaics. SPP will get closer to the Sun than any previous mission, and the solar array will therefore need to operate reliably under unusually high irradiances, temperatures, and angles of inciden ... Boca, Andreea; Blumenfeld, Philip; Crist, Kevin; Flynn, Greg; McCarty, James; Patel, Pravin; Sarver, Charles; Sharps, Paul; Stall, Rick; Stan, Mark; Tourino, Cory; Published by: Conference Record of the IEEE Photovoltaic Specialists Conference Published on: Cell engineering; Economic and social effects; NASA; Probes; Software testing; Solar cell arrays; Space flight; Thermal Engineering; Parker Engineering |
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Testing of solar cells for the solar probe plus mission The Solar Probe Plus (SPP) is an upcoming mission in NASA s "Living with a Star Program" to be built by the Johns Hopkins University Applied Physics Laboratory. The spacecraft will orbit the sun for a primary mission duration of seven years, making a closest approach to the sun at a distance of 0.0442 AU. Instrumentation on SPP will focus on two primary science investigations: the sun s coronal heating and solar wind acceleration, and the production, evolution, and transport of solar energetic particles. The mission is sched ... Scheiman, David; Piszczor, Michael; Snyder, David; McNatt, Jeremiah; Landis, Geoffrey; Isabella, Louis; Putt, Nicolas; Published by: Conference Record of the IEEE Photovoltaic Specialists Conference Published on: Gallium compounds; Heat shielding; NASA; Orbits; Probes; Solar cell arrays; Space flight; Parker Engineering |
| 2010 |
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Combined effect of high temperature and VUV radiation on carbon-based materials For the next exploration of the sun, missions like Solar Probe+ (NASA) or Phoibos (ESA) will be launched to answer to fundamental questions on the solar corona heating and solar winds origin. Such solar probes missions that will pass very close to the sun, respectively at 9.5 and 4 solar radii (Rs), need thermal shield to protect the payload and the instrumentation. Carbon/carbon composites can withstand the severe environment encountered during the pass of the sun and have to be studied to understand their physico-chemical ... Eck, J.; Sans, J.L.; Balat-Pichelin, M.; Published by: ECS Transactions Published on: Carbon; Carbon carbon composites; Heat shielding; NASA; Probes; Space flight; Parker Engineering |
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Solar Probe Plus: Impact of light scattering by solar system dust on star tracker performance NASA s upcoming Solar Probe Plus mission will be the first to approach the Sun as close as 8.5 solar radii from the surface and provide in-situ observations of the Sun s corona. In the absence of observational data (e.g., Helios, Pioneer), for distances less than 0.3 AU, the ambient dust distribution close to the Sun remains poorly known and limited to model extrapolation for distances < 1 AU. For the Solar Probe Plus (SPP) mission it is critical to characterize the inner solar system dust environment to evaluate potential i ... Strikwerda, Thomas; Strong, Shadrian; Rogers, Gabe; Published by: Advances in the Astronautical Sciences Published on: Atomic absorption spectrometry; Dust; Light scattering; NASA; Probes; Solar system; Space flight; Stars; Parker Engineering |
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