|
Notice:
|
Found 46 entries in the Bibliography.
Showing entries from 1 through 46
| 2019 |
|
So you Passed an Earned Value Management Government Validation - Now What? In December 2016, The Johns Hopkins University Applied Physics Laboratory (JHU/APL) received formal acceptance from NASA that its Earned Value Management System (EVMS) complied with the Electronic Industries Alliance (EIA) Standard 748 EVMS guidelines and thus had a government validated system. JHU/APL had successfully used its EVMS for single, large missions (Van Allen Probe from January 2009 to July 2012 and Parker Solar Probe from April 2014 to August 2018), but now with an increased workload JHU/APL was faced with the ne ... Liggett, William; Hunter, Howard; Jones, Matthew; Published by: IEEE Aerospace Conference Proceedings Published on: Budget control; Electronics industry; Financial data processing; Investments; NASA; Probes; Parker Engineering |
|
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 |
|
Parker solar probe structural-thermal analysis challenges The NASA Parker Solar Probe spacecraft, built by the Johns Hopkins University Applied Physics Lab will fly through the outermost part of the Sun s atmosphere taking in situ measurements and imaging to improve our understanding of the corona and the solar wind. The Thermal Protection System (TPS), a 4.5-inch thick carbon-composite heat shield, limits heat transfer to the spacecraft during its flight through the Sun s atmosphere, and casts a shadow which protects the spacecraft and its instruments from the harsh thermal enviro ... Conkey, Shelly; Congdon, Elisabeth; Schaefer, Ed; Abel, Elizabeth; Published by: Proceedings of the International Astronautical Congress, IAC Published on: Ability testing; Carbon carbon composites; Correlation methods; Heat shielding; Heat transfer; NASA; Orbits; Probes; Software testing; Structural properties; Temperature; Test facilities; Thermoanalysis; Thermocouples; Uncertainty analysis; Parker Engineering |
|
Successful development of high temperature systems is complex and difficult. Limitations in testing, manufacturing and materials means that design and testing of such systems is challenging. NASA s Parker Solar Probe (PSP) Spacecraft built by the Johns Hopkins Applied Physics Laboratory was launched in August 2018 and is measuring the Sun s atmosphere in situ. A critical technology development which made this mission possible is the 4.5 inch-thick Thermal Protection System (TPS) that has to withstand 2500°F and protect t ... Congdon, Elizabeth; Mehoke, Douglas; Conkey, Shelly; Schaefer, Ed; Abel, Elisabeth; Published by: Proceedings of the International Astronautical Congress, IAC Published on: Heat shielding; High temperature effects; High temperature engineering; Manufacture; NASA; Probes; Thermal insulating materials; Parker Engineering |
|
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 |
|
The Use of the Expanded FMEA in Spacecraft Fault Management The NASA/APL Parker Solar Probe (PSP) mission will revolutionize our understanding of the Sun by swooping to within 4 million miles of the Sun s surface. This mission targets the fundamental processes and dynamics that characterize the Sun s corona and outwardly expanding solar wind and will be the first mission to fly into the low solar corona (i.e., the Sun s atmosphere) revealing both how the corona is heated and how the solar wind is accelerated. PSP has many engineering challenges presented by the intense environment in ... Jones, Melissa; Fretz, Kristin; Kubota, Sanae; Smith, Clayton; Published by: Proceedings - Annual Reliability and Maintainability Symposium Published on: Failure modes; Fault detection; Human resource management; Maintainability; NASA; Risk analysis; Risk assessment; Safety factor; Solar radiation; Solar wind; Spacecraft; Parker Engineering |
|
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 |
|
Flight path control analysis for parker solar probe An unprecedented NASA mission to study the Sun, known as Parker Solar Probe (PSP), is under development. The primary objective of the PSP mission is to gather new data within 10 solar radii of the Sun’s center. The purpose of this paper is to review the statistical analysis of trajectory correction maneuvers (TCMs) for PSP’s baseline trajectory. The baseline mission includes a total of 42 TCMs that will be accomplished with a monopropellant propulsion system that consists of twelve 4.4 N thrusters. Assuming curre ... Valerino, Powtawche; Thompson, Paul; Jones, Drew; Goodson, Troy; Chung, Min-Kun; Mottinger, Neil; Published by: Advances in the Astronautical Sciences Published on: Astrophysics; NASA; Probes; Propulsion; Statistical methods; Parker Engineering |
|
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 |
|
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 |
|
Stray light testing of WISPR baffle development model Solar Probe Plus (SPP) is a NASA mission developed to visit and study the sun closer than ever before. SPP is designed to orbit as close as 7 million km (9.86 solar radii) from Sun center. One of its instruments: WISPR (Wide-Field Imager for Solar Probe Plus) will be the first local imager to provide the relation between the large-scale corona and the in-situ measurements. Hellin, M.-L.; Mazy, E.; Marcotte, S.; Stockman, Y.; Korendyke, C.; Thernisien, A.; Published by: Proceedings of SPIE - The International Society for Optical Engineering Published on: |
|
Spacecraft power distribution unit test system re-use: Advantages, pitfalls and challenges The Solar Probe Plus (SPP) mission, part of NASA s Living With a Star program, is set to launch in July of 2018 on a trip to travel through the Sun s corona. The first component that will be integrated to the spacecraft is the Power Distribution Unit (PDU). The SPP PDU was based on the PDU design utilized for the Van Allen Probes (formerly Radiation Belt Storm Probes) mission, but with some very significant differences. Due to the fact that the SPP spacecraft is a much more complex vehicle, it requires nearly twice as many p ... Published by: IEEE Aerospace Conference Proceedings Published on: Commercial off-the-shelf; NASA; Probes; Radiation belts; Spacecraft; Telemetering equipment; Testing; Parker Engineering |
|
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 |
|
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 |
|
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 |
|
Flight software verification methods in frontier radio for solar probe plus mission Success of deep space missions requires comprehensive performance verification for all hardware and software systems on the spacecraft over a broad scope of conditions and configurations, including the telecommunications subsystem. NASA Solar Probe Plus mission uses a software-defined radio for its telecommunications; thus a dedicated suite of tests are required for verification of the radio software in addition to traditional hardware verification procedures. Frontier Radio, developed by Johns Hopkins University Applied Phy ... Kufahl, Katelyn; Wortman, Kristin; Burke, Linda; Hennawy, Joseph; Adams, Norman; Sheehi, Joseph; Published by: IEEE Aerospace Conference Proceedings Published on: Computer software selection and evaluation; Digital radio; Digital signal processing; Instrument testing; Interplanetary flight; NASA; Probes; radio receivers; Software radio; Verification; Parker Engineering |
|
Advancements in hardware design for the frontier radio used for the solar probe plus mission The Frontier Radio for the Solar Probe Plus mission offers a host of hardware design and manufacturing improvements. These improvements build on the technology readiness level (TRL)-9 radio platform that was flown on the Van Allen Probes mission in a duplexed S-band configuration and several development tasks funded by NASA Headquarters. Prior RF slice designs consisted of two separate circuit boards: one for lower frequencies and one for high-frequencies; advances in technology enabled the use of a high-frequency multilayer ... Angert, Matthew; Bubnash, Brian; Hearty, Ryan; Neill, Michael; Ling, Sharon; Matlin, Daniel; Cheng, Sheng; Published by: IEEE Aerospace Conference Proceedings Published on: Digital signal processing; Field programmable gate arrays (FPGA); Integrated circuit design; Interplanetary flight; Magnesium alloys; Manufacture; NASA; Probes; Random access storage; Parker Engineering |
|
NASA s Parker Solar Probe (PSP) spacecraft (formerly Solar Probe Plus) is scheduled for launch in July 2018 with a planned heliocentric orbit that will carry it on a series of close passes by the Sun with perihelion distances that eventually will get below 10 solar radii. Among other in-situ and imaging sensors, the PSP payload includes the two-instrument "Integrated Science Investigation of the Sun" suite, which will make coordinated measurements of energetic ions and electrons. The high-energy instrument (EPI-Hi), operatin ... Wiedenbeck, M.E.; Angold, N.G.; Birdwell, B.; Burnham, J.A.; Christian, E.R.; Cohen, C.M.S.; Cook, W.R.; Crabill, R.M.; Cummings, A.C.; Davis, A.J.; Dirks, G.; Do, D.H.; Everett, D.T.; Goodwin, P.A.; Hanley, J.J.; Hernandez, L.; Kecman, B.; Klemic, J.; Labrador, A.W.; Leske, R.A.; Lopez, S.; Link, J.T.; McComas, D.J.; Mewaldt, R.A.; Miyasaka, H.; Nahory, B.W.; Rankin, J.S.; Riggans, G.; Rodriguez, B.; Rusert, M.D.; Shuman, S.A.; Simms, K.M.; Stone, E.C.; Von Rosenvinge, T.T.; Weidner, S.E.; White, M.L.; Published by: Proceedings of Science Published on: cosmic rays; Cosmology; NASA; Orbits; Probes; Radioactivity; Parker Engineering |
|
Development of a flight qualified ka-band multi-chip module for the solar probe plus mission The Johns Hopkins University Applied Physics Lab (JHU/APL) has developed a flight qualified, hermetically sealed, I/Q modulator Ka-band Multi-chip Module (MCM). Prototypes of this device have been developed over the years, but Solar Probe Plus (SPP) will be the first mission to use a flight qualified version of the MCM. This MCM enables a first for a deep-space mission: primary science data downlink with simultaneous data and navigation over Ka-band. SPP will also be the first JHU/APL mission to use Ka-band for downlink. The ... Matlin, Daniel; Sharma, Avinash; Angert, Matthew; Cheng, Sheng; Lehtonen, John; Published by: IEEE Aerospace Conference Proceedings Published on: Commercial off-the-shelf; Electronic equipment testing; Gallium arsenide; III-V semiconductors; Interplanetary flight; Monolithic microwave integrated circuits; NASA; Probes; Parker Engineering |
| 2016 |
|
A theoretical analysis of Ka-band turnaround noise in radios used for deep space comm/Nav Deep-space missions typically use a radio link between the Deep Space Network (DSN) ground stations and the spacecraft to transmit telemetry data and to generate the range and Doppler shift measurements that enable precise navigation. The amount of carrier phase noise present in this radio link is an important metric of performance, and radios are often designed to minimize the impact of this noise. From a communication perspective, more noise causes an increase in the system s frame-error rate, and from a navigation perspec ... Duven, Dennis; Jensen, Bob; Mitch, Ryan; Kinman, Peter; Published by: IEEE Aerospace Conference Proceedings Published on: Doppler effect; Errors; Interplanetary flight; NASA; Phase noise; Radio links; Scintillation; thermal noise; Parker Engineering |
|
Enabling coherent Ka-band downlink with a software-defined radio The migration to Ka-band for science downlink on deep space missions increases data rates significantly, but also presents new challenges to radio and RF system designers. One challenge is to maintain low carrier phase noise on a coherent downlink. Thermal noise on the X-band uplink that is within the bandwidth of the carrier recovery process modulates the phase of the coherent downlink. For missions that use X-band for command uplink and Ka-band for science downlink, such as the NASA Solar Probe Plus mission, the ratio of d ... Adams, Norman; Angert, Matthew; Copeland, David; Haskins, Christopher; Published by: IEEE Aerospace Conference Proceedings Published on: Additive noise; Interplanetary flight; NASA; Radio navigation; Software radio; Parker Engineering |
|
The NASA’s Solar Probe Plus spacecraft must endure extreme heat loads while passing near the Sun. Due to its high incident heatload and temperature, the spacecraft Thermal Protection System (TPS) must be simulated using a custom thermal simulator during spacecraft thermal vacuum testing. As part of the development of the TPS thermal simulator, subscale testing was performed. The design, testing, results and lessons learned are described in this paper. Especially useful are the design aspects needed to achieve the high ... Congdon, Elizabeth; Abel, Elisabeth; Heisler, Elizabeth; Published by: 32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference Published on: Aerodynamics; Heat shielding; NASA; Probes; Simulators; Spacecraft; Thermal insulating materials; Parker Engineering |
|
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 |
|
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 |
|
Data acquisition performance for deep space communications in solar probe plus frontier radio Radio receivers for deep space telecommunications require tracking loops that are robust in low signal-to-noise ratio conditions for not only carrier tracking, but also subcarrier tracking and bit synchronization. However, the loop band-widths must not be too narrow so as to accommodate Doppler dynamics, oscillator drift, and requirements for expedient and reliable data acquisition. The present work describes the data acquisition performance of Frontier Radio for the NASA Solar Probe Plus mission. The data acquisition time i ... Kufahl, Katelyn; Adams, Norman; Kirschner, William; Published by: IEEE Aerospace Conference Proceedings Published on: Automation; Clocks; NASA; Probes; Remote control; Signal receivers; Signal to noise ratio; Testing; Wages; Parker Engineering |
|
Solar Probe Plus Spacecraft Flight Software requirements verification test framework Comprehensive Spacecraft Flight Software requirements verification is essential to the success of deep space missions. NASA s Solar Probe Plus (SPP) Spacecraft Flight Software and requirement verification activities are being implemented by Johns Hopkins University Applied Physics Laboratory (JHU/APL) located in Laurel, MD. JHU/APL s software development process for a critical mission requires an independent verification of all Spacecraft Flight Software requirements. The complexity of SPP s Spacecraft Flight Software and th ... Jacobs, Samantha; Wortman, Kristin; Published by: IEEE Aerospace Conference Proceedings Published on: Flight control systems; Formal verification; Interplanetary flight; NASA; Probes; Program debugging; Requirements engineering; Software design; Spacecraft; Parker Engineering |
| 2015 |
|
As part of a larger effort led by the Keck Institute for Space Studies at the California Institute of Technology, the Advanced Concepts Office at NASA’s George C. Marshall Space Flight Center conducted a study to assess what low-thrust advanced propulsion system candidates, existing and near term, could deliver a small, Voyager-like satellite to our solar system’s heliopause, approximately 100 AU from the center of the sun, within 10 years and within a 2025 to 2035 launch window. The advanced propulsion system tr ... Hopkins, Randall; Thomas, Herbert; Wiegmann, Bruce; Heaton, Andrew; Johnson, Les; Baysinger, Michael; Beers, Benjamin; Published by: AIAA SPACE 2015 Conference and Exposition Published on: Antennas; Earth (planet); Hall effect devices; Hall thrusters; Heat shielding; Interplanetary flight; NASA; Small satellites; Solar equipment; Solar radiation; Sun; Tetherlines; Trajectories; Parker Engineering |
|
Development and implementation of unique testing methods for the Solar Probe Plus array As a NASA mission to touch the sun Solar Probe Plus (SPP) reveals challenges previously not encountered in space solar panel design and testing. Simulating flight conditions require new testing methods and equipment which have been specifically developed for this unique PV application. Testing under high intensity, high temperature conditions over large areas poses design and logistic challenges, while testing cell performance degradation to a measurement level error of <1% involved fabrication of custom LED simulators. Gerger, Andrew; Sharps, Paul; Stall, Richard; Sulyma, Christopher; De Zetter, Karen; Johnson, Paul; Crist, Kevin; Published by: 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 Published on: Heliostats (instruments); Light emitting diodes; NASA; Probes; Parker Engineering |
| 2014 |
|
Design of a spacecraft integration and test facility The Johns Hopkins University Applied Physics Laboratory (JHU/APL) is dedicated to solving critical challenges as set forth by the National Aeronautics and Space Administration and the Department of Defense. JHU/APL participates fully in the nation s formulation of space science and exploration priorities, providing the needed science, engineering, and technology, including the production and operation of unique spacecraft, instruments, and subsystems. Built in 1983, JHU/APL s spacecraft integration and test facility has supp ... Liggett, William; Handiboe, Jon; Theus, Eugene; Hartka, Ted; Navid, Hadi; Published by: 28th Space Simulation Conference - Extreme Environments: Pushing the Boundaries Published on: Benchmarking; Design; Human resource management; NASA; Probes; Test facilities; Parker Engineering |
|
Optimization of deep-space Ka-band link schedules Downlink scheduling methods that minimize either contact time or data latency are described. For deep-space missions these two methods yield very different schedules. Optimal scheduling algorithms are straightforward for ideal mission scenarios. In practice, additional schedule requirements preclude a tractable optimal algorithm. In lieu of an optimal solution, an iterative sub-optimal algorithm is described. These methods are motivated in part by a need to balance mission risk, which increases with data latency, and mission ... Adams, Norman; Copeland, David; Mick, Alan; Pinkine, Nickalaus; Published by: IEEE Aerospace Conference Proceedings Published on: |
|
Solar probe plus solar array cooling system T-Vac test The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, is designing and building the Solar Probe Plus (SPP) spacecraft and managing the project for NASA s Living with a Star (LWS) program. The main objectives of the SPP mission are to understand the Sun s coronal magnetic field, the causes of solar corona and solar wind heating and acceleration, and the mechanisms of energetic particles acceleration and transportation. To achieve these objectives, the SPP spacecraft needs to make in-situ measurements in ... Published by: 28th Space Simulation Conference - Extreme Environments: Pushing the Boundaries Published on: Cooling systems; Interplanetary flight; NASA; Probes; Software testing; Solar energy; Spacecraft; Thermoelectric equipment; Waste heat; Parker Engineering |
|
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 |
|
Solar Probe Plus mission overview Solar Probe Plus will be the first mission to pass into the solar corona to study how the corona is heated and the solar wind is accelerated. Solving these two fundamental mysteries has been a top-priority science goal for over five decades. The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, is managing the mission for NASA s Living with a Star Program, including the development, build, and operation of the spacecraft. SPP will launch in 2018, performing 24 orbits of the Sun over a 7-year duration. ... Reynolds, Edward; Driesman, Andrew; Kinnison, James; Lockwood, Mary; Hill, Patrick; Published by: AIAA Guidance, Navigation, and Control (GNC) Conference Published on: Carbon; Foams; Heat shielding; Interplanetary flight; NASA; Probes; Solar cell arrays; Solar energy; Spacecraft; Temperature; Thermal insulating materials; Parker Engineering |
|
Comparison of Ka-band link design strategies for solar probe plus This study compares different strategies for planning and controlling the Ka-band downlink for NASA s upcoming Solar Probe Plus mission. This downlink provides the science data return: as such the availability of a specific pass is of less importance than the average performance of the link over an entire orbit. Three options for setting the link data rate were considered in this study: 1) a single data rate optimized for maximum effective data rate at the beginning of the pass, 2) a single data rate set to optimize return o ... Copeland, David; Adams, Norman; Published by: IEEE Aerospace Conference Proceedings Published on: |
|
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 |
|
UV-exposure experiments for the Solar Probe Plus array NASA s Solar Probe Plus (SPP) will travel closer to the Sun than any previous spacecraft. During its 7-year, 24-orbit mission, SPP will make scientific measurements of the solar corona, reaching minimum perihelion at ∼9.5 solar radii (R Boca, Andreea; Blumenfeld, Philip; Crist, Kevin; De Zetter, Karen; Richards, Benjamin; Sarver, Charles; Sharps, Paul; Stall, Richard; Stan, Mark; Published by: Conference Record of the IEEE Photovoltaic Specialists Conference Published on: NASA; Photovoltaic cells; Probes; Radiation effects; Solar cell arrays; Sun; Temperature distribution; Parker Engineering |
| 2012 |
|
Solar probe plus mission definition Solar Probe Plus will be the first mission to touch the Sun - To fly into the solar corona to study how the corona is heated and the solar wind is accelerated. Solving these two fundamental mysteries has been a top-priority science goal for over five decades. Thanks to an innovative design, emerging technology developments and completion of a successful Phase A, answers to these critical questions will soon be achieved. The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, is designing and building the ... Lockwood, Mary; Kinnison, James; Fox, Nicola; Conde, Richard; Driesman, Andrew; Published by: Proceedings of the International Astronautical Congress, IAC Published on: Carbon; Foams; Heating; Interplanetary flight; magnetic fields; Microwave antennas; NASA; Probes; Remote sensing; Research laboratories; Solar cell arrays; Solar radiation; Solar wind; Temperature; Parker Engineering |
|
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 |
|
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 |
|
Solar Probe Plus, mission update Solar Probe Plus (SPP) will be the first mission to fly into the low solar corona, revealing how the corona is heated and the solar wind is accelerated, solving two fundamental mysteries that have been top-priority science goals for over five decades. Thanks to an innovative design, emerging technology developments and a significant risk reducing engineering development program these critical goals will soon be achieved. The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, is designing and building th ... Morse, Brian; Kinnison, James; Lockwood, Mary; Reynolds, Edward; Fox, Nicola; Published by: 62nd International Astronautical Congress 2011, IAC 2011 Published on: Carbon; Heating; Instrument testing; Interplanetary flight; magnetic fields; Microwave antennas; NASA; Probes; Solar cell arrays; Solar radiation; Solar wind; Temperature; Parker Engineering |
|
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 |
|
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 |
|
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 |
|
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 |
|
Solar probe plus, a historic mission to the sun Solar Probe Plus (SPP) will be the first mission to fly into the low solar corona, revealing how the corona is heated and the solar wind is accelerated, solving two fundamental mysteries that have been top-priority science goals for decades. Thanks to an innovative design, emerging technology developments and a significant risk reducing engineering development program these critical goals will soon be achieved. The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, is designing and building the Solar Pr ... Kinnison, James; Morse, Brian; Lockwood, Mary; Reynolds, Edward; Decker, Robert; Published by: 61st International Astronautical Congress 2010, IAC 2010 Published on: Carbon; Interplanetary flight; magnetic fields; Microwave antennas; NASA; Probes; Solar cell arrays; Solar wind; Temperature; Parker Engineering |
|
Development of a high-temperature optical coating for thermal management on solar probe plus NASA s Solar Probe Plus (SPP) is approaching within 9.5 solar radii from the center of the sun. The SPP thermal protection system (TPS) is a 2.7 meter heat shield. The heat shield reaches temperatures of 1400°C on its front surface, its worst thermal case, and is subjected to launch loads, its worst mechanical case. The front surface of the thermal protection system is coated with an optically white coating in order to reduce the front surface temperature of the TPS and reduce the resulting heat flow into the spacecraft. ... Congdon, Elizabeth; Mehoke, Douglas; Buchta, Mark; Nagle, Dennis; Zhang, Dajie; Spicer, James; Published by: 10th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Published on: Heat shielding; Heat transfer; NASA; Optical coatings; Probes; Thermal insulating materials; Thermal variables control; Parker Engineering |
1
