PSP Bibliography





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Found 97 entries in the Bibliography.


Showing entries from 51 through 97


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:

YEAR: 2016     DOI:

Doppler effect; Errors; Interplanetary flight; NASA; Phase noise; Radio links; Scintillation; thermal noise; Parker Engineering

From prototype technology to flight: Infusing the Frontier Radio into space missions

New technologies are constantly being developed at many space-related institutions. A significant challenge is to not only propose and develop these new technologies, but to infuse them into real space missions. The Johns Hopkins University Applied Physics Laboratory (JHU/APL) has a successful history of infusing such new technologies into NASA flight programs, including non-coherent navigation in the CONTOUR mission (launched 2002), a circularly-polarized phased-array antenna on the MESSENGER mission (2004), and a low-power ...

Srinivasan, Dipak; Haskins, Christopher;

Published by: Proceedings of the International Astronautical Congress, IAC      Published on:

YEAR: 2016     DOI:

Parker Engineering

2015

Propulsion technology assessment: Science and enabling technologies to explore the interstellar medium

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:

YEAR: 2015     DOI:

Antennas; Earth (planet); Hall effect devices; Hall thrusters; Heat shielding; Interplanetary flight; NASA; Small satellites; Solar equipment; Solar radiation; Sun; Tetherlines; Trajectories; Parker Engineering

Glass surface spall size resulting from interplanetary dust impacts

The size of relatively large dynamic conchoidal fractures, i.e., surface spalls, immediately adjacent to and around interplanetary dust (IDP) hypervelocity impact (HVI) craters or pits in glass substrates is relevant to spacecraft solar cell and science instrument lens performance metrics, as well as glass pane design and safety in manned missions. This paper presents an analysis of the diameter of surface spalls in glass for the Solar Probe Plus (SPP) spacecraft, whose solar arrays and instruments must survive a 7-year miss ...

Iyer, Kaushik; Mehoke, Douglas; Chadegani, Alireza; Batra, Romesh;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2015     DOI:

Ballistics; Dust; Glass; Particle size analysis; Solar cell arrays; Spalling; Substrates; 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:

YEAR: 2015     DOI:

Heliostats (instruments); Light emitting diodes; NASA; Probes; Parker Engineering

2014

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:

YEAR: 2014     DOI:

Interplanetary flight; NASA; Parker Engineering

Outgassing modeling for solar probe plus

The spacecraft for the Solar Probe Plus mission, due to launch in 2018, will encounter an extreme near-Sun thermal and plasma environment. Outgassing of materials such as silicone adhesives in this previously unexplored environment can result in deposits on solar arrays, instrument components, and other sensitive spacecraft surfaces. Array surfaces exposed to UV can cause those deposits to be fixed to the surface, degrading their performance. To assess the severity of the deposits, the Solar Probe Plus program has undertaken ...

Donegan, M.; Nichols, J.;

Published by: 28th Space Simulation Conference - Extreme Environments: Pushing the Boundaries      Published on:

YEAR: 2014     DOI:

Adhesives; Deposits; Silicones; Solar cell arrays; Parker Engineering

Predicting the solar probe plus solar array output

Predicting the output of the Solar Probe Plus (SPP) solar array presents unique challenges as the array operates at very high temperatures and irradiances, and has a water-cooled substrate. A further complication arises because, close to perihelion, each string operates at an irradiance and temperature different from the other strings. This paper provides the methodology and results for computing the output of the array over a range of irradiances from zero to seventy suns, temperatures from -80°C to 164°C, and angle ...

Gaddy, Edward; Butler, Michael; Lockwood, Mary; Martin, Gayle; Roufberg, Lew; Vigil, Cristina; Boca, Andreea; Richards, Benjamin; Stall, Rick; Schurman, Matthew;

Published by: 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014      Published on:

YEAR: 2014     DOI:

Aerospace engineering; Cell engineering; Photoelectrochemical cells; Photovoltaic cells; Probes; Satellites; Solar cell arrays; Sun; Parker Engineering

Application of aerogravity assist with active cooling and thermal propulsion to the solar probe mission

Aerogravity assist is an orbital transfer technique that enhances the effect of gravity assist maneuvers by utilizing aerodynamic lift in addition to gravity. This enables greater turning angles from a planetary assist, potentially cutting years off a conventional gravity assisted trajectory with multiple flybys or significantly reducing required launch C3. One of the major challenges are the extreme heat loads and heat fluxes present when flying through atmospheres at interplanetary speeds. Incorporating an activ ...

Murakami, David;

Published by: 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014      Published on:

YEAR: 2014     DOI:

Aerodynamics; Automobile cooling systems; Cooling; Interplanetary flight; Orbital transfer; Orbits; Probes; Parker Engineering

Extreme temperature thermal vacuum testing of the solar probe plus radiator

The Solar Probe Plus (SPP) spacecraft is equipped with four thermal radiators as part of the solar array cooling system. This cooling system rejects the heat absorbed by two high heat flux solar arrays. Each thermal radiator is comprised of nine aluminum radiation fins that are bonded with epoxy to titanium tubes. These tubes are connected together via inlet and outlet manifolds to create each radiator assembly. The solar arrays are cooled by micro-channel-etched titanium plates through which the working fluid, water, is for ...

Drabenstadt, Christian; Ercol, Carl;

Published by: 28th Space Simulation Conference - Extreme Environments: Pushing the Boundaries      Published on:

YEAR: 2014     DOI:

Coolants; Cooling; Cooling systems; DC motors; Fins (heat exchange); Heat flux; Heat radiation; Liquefied gases; Probes; Solar cell arrays; Thermoanalysis; Thermoelectric equipment; Vacuum technology; Waste heat; Parker Engineering

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 ...

Cho, Wei-Lin; Ercol, Carl;

Published by: 28th Space Simulation Conference - Extreme Environments: Pushing the Boundaries      Published on:

YEAR: 2014     DOI:

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 ...

Baisden, Carson;

Published by: 12th International Energy Conversion Engineering Conference, IECEC 2014      Published on:

YEAR: 2014     DOI:

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

Interplanetary dust particle shielding capability of spacecraft multi-layer insulation

The Solar Probe Plus (SPP) spacecraft is expected to encounter unprecedented levels of interplanetary dust particle (IDP) exposure during its approximately 7-year journey. To assure mission success it is necessary to define the dust hypervelocity impact (HVI) protection levels provided by its Multi-Layer Insulation (MLI)/thermal blankets with a reliability that is on par with that available for metallic Whipple shields. Development of a new ballistic limit equation (BLE) in the 7-150 km/s HVI range for representative 2-wall ...

Iyer, Kaushik; Mehoke, Douglas; Batra, Romesh;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2014     DOI:

Aluminum alloys; Ballistics; Dust; Fused silica; Particle size; Particle size analysis; Polyimides; Ternary alloys; Titanium alloys; Parker Engineering

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:

YEAR: 2014     DOI:

Benchmarking; Design; Human resource management; NASA; Probes; Test facilities; Parker Engineering

2013

The design, development, and implementation of a solar environmental simulator (SES) for the SAO Faraday Cup on Solar Probe Plus

This paper describes the implementation of a solar simulator, know as the Solar Environment Simulator (SES), that can simulate solar flux levels up to those encountered at 9.8 solar radii. The paper outlines the design, and the challenges of realizing the SES. It also describes its initial uses for proving out the design of the Solar Winds Electrons, Alphas, and Protons (SWEAP) Faraday cup. The upcoming Solar Probe Plus (SPP) mission requires that its in-situ plasma instrument (the Faraday Cup) survive and operate over an un ...

Cheimets, Peter; Bookbinder, Jay; Freeman, Mark; Gates, Richard; Gauron, Thomas; Guth, Giora; Kasper, Justin; McCracken, Kenneth; Podgorski, William;

Published by: Proceedings of SPIE - The International Society for Optical Engineering      Published on:

YEAR: 2013     DOI:

Arc lamps; Power control; Probes; Test facilities; Parker Engineering

Development and test of an active pixel sensor detector for heliospheric imager on solar orbiter and solar probe plus

The Naval Research Laboratory is developing next generation CMOS imaging arrays for the Solar Orbiter and Solar Probe Plus missions. The device development is nearly complete with flight device delivery scheduled for summer of 2013. The 4Kx4K mosaic array with 10micron pixels is well suited to the panoramic imaging required for the Solar Orbiter mission. The devices are robust (<100krad) and exhibit minimal performance degradation with respect to radiation. The device design and performance are described. © 2013 SPIE.

Korendyke, Clarence; Vourlidas, Angelos; Plunkett, Simon; Howard, Russell; Wang, Dennis; Marshall, Cheryl; Waczynski, Augustyn; Janesick, James; Elliot, Thomas; Tuna, Samuel; Tower, John; Grygon, Mark; Keller, David; Clifford, Gregory;

Published by: Proceedings of SPIE - The International Society for Optical Engineering      Published on:

YEAR: 2013     DOI:

CMOS integrated circuits; Heat radiation; Probes; Research laboratories; Parker Engineering

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:

YEAR: 2013     DOI:

Carbon; Foams; Heat shielding; Interplanetary flight; NASA; Probes; Solar cell arrays; Solar energy; Spacecraft; Temperature; Thermal insulating materials; Parker Engineering

Solar Probe Plus: A mission to touch the sun

Solar Probe Plus (SPP), currently in Phase B, 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 since such a mission was first proposed in 1958. The scale and concept of such a mission has been revised at intervals since that time, yet the core has always been a close encounter with the Sun. SPP uses an innovative mission design, significant technology development and a r ...

Kinnison, James; Lockwood, Mary; Fox, Nicola; Conde, Richard; Driesman, Andrew;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2013     DOI:

Commerce; magnetic fields; Solar wind; Parker Engineering

Technology development for the solar probe plus faraday cup

The upcoming Solar Probe Plus (SPP) mission requires novel approaches for in-situ plasma instrument design. SPP s Solar Probe Cup (SPC) instrument will, as part of the Solar Wind Electrons, Alphas, and Protons (SWEAP) instrument suite, operate over an enormous range of temperatures, yet must still accurately measure currents below 1 pico-amp, and with modest power requirements. This paper discusses some of the key technology development aspects of the SPC, a Faraday Cup and one of the few instruments on SPP that is directly ...

Freeman, Mark; Kasper, Justin; Case, Anthony; Daigneau, Peter; Gauron, Thomas; Bookbinder, Jay; Brodu, Etienne; Balat-Pichelin, Marianne; Wright, Kenneth;

Published by: Proceedings of SPIE - The International Society for Optical Engineering      Published on:

YEAR: 2013     DOI:

plasmas; Solar wind; 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:

YEAR: 2013     DOI:

Distribution functions; NASA; Parker Engineering

A first look at the guidance and control system for the Solar Probe Plus mission

The Solar Probe Plus mission plans to send a spacecraft to explore the inner region of the heliosphere and is currently working towards launch in 2018. Protection from the harsh solar environment is accomplished with a large thermal protection system (TPS), which includes a large shield protecting most spacecraft components and instruments from direct exposure to the Sun. Reliable attitude control is needed to keep the TPS shield between the main body of the spacecraft and th ...

Vaughan, Robin; Shapiro, Hongxing; Wirzburger, John;

Published by: AIAA Guidance, Navigation, and Control (GNC) Conference      Published on:

YEAR: 2013     DOI:

Attitude control; Conceptual design; Control systems; Solar cell arrays; Parker Engineering

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:

YEAR: 2013     DOI:

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 (Rs) from the center of the Sun. The solar array wings powering the spacecraft will operate under wide-ranging temperature and irradiance conditions, of 0 to 27×AM0 and -70 to +160°C nominally, with transient off-nominal survivability required up to 80×AM0. Over th ...

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:

YEAR: 2013     DOI:

NASA; Photovoltaic cells; Probes; Radiation effects; Solar cell arrays; Sun; Temperature distribution; Parker Engineering

Avoiding the burn: Maintaining a Sun-safe attitude for the Solar Probe Plus spacecraft

The Solar Probe Plus (SPP) mission plans to send a spacecraft to explore the inner region of the heliosphere and is currently working towards launch in 2018. The SPP spacecraft will make in-situ measurements and remote observations over a series of 24 nearly-ecliptic solar orbits with perihelion decreasing from 35 solar radii (Rs) to a minimum of 9.86 Rs over a period of 7 years. Proper orientation of the spacecraft and solar arrays relative to the Sun is essential for a successful mission. A large shield must be kept betwee ...

Vaughan, Robin; Kubota, Sanae; Shapiro, Hongxing; Kagan, Mike; Vesel, John;

Published by: AIAA Guidance, Navigation, and Control (GNC) Conference      Published on:

YEAR: 2013     DOI:

Attitude control; Closed loop control systems; Failure analysis; Probes; Solar cell arrays; Spacecraft; Parker Engineering

Mechanical design of the solar probe cup instrument on solar probe plus

The Solar Probe Cup (SPC) Instrument is a Sun-facing Faraday Cup instrument slated for launch aboard the Solar Probe Plus (SPP) spacecraft in 2018. SPC is one of two instruments onboard the Solar Wind Electrons Alphas Protons (SWEAP) instrument suite and is the only SPP charged particle instrument that will not be shielded behind the spacecraft s Thermal Protection System (TPS). The 7-year SPP mission will take SPC on 24 solar encounters at perihelia ranging from 35 to 9.86 solar radii (RS). The SPC components will encounter ...

Bergner, H.; Caldwell, D.; Case, A.W.; Daigneau, P.; Freeman, M.; Kasper, J.;

Published by: Proceedings of SPIE - The International Society for Optical Engineering      Published on:

YEAR: 2013     DOI:

Charged particles; Heat shielding; Parker Engineering

Thermal design for high-temperature high-irradiance testing of space solar panel components

Emcore has been performing High Intensity High Temperature (HIHT) tests on covered, interconnected cell (CIC) assemblies. End-of-life performance of spacecraft solar panels depends to a great extent on changes in the optical properties of the CICs coverglass adhesive during the mission. An important change in silicone coverglass adhesives is observed as degradation of short wavelength transmission, often called darkening or yellowing . This is understood to be driven by exposure to high intensity UV and by exposure to el ...

Blumenfeld, Philip; Boca, Andreea; Sharps, Paul; Russell, Dennis; Ogawa, Hiroyuki; Toyota, Hiroyuki;

Published by: Conference Record of the IEEE Photovoltaic Specialists Conference      Published on:

YEAR: 2013     DOI:

Adhesives; Heat radiation; Optical properties; Predictive analytics; Silicones; Solar energy; Temperature control; Test facilities; Parker Engineering

2012

High-irradiance high-temperature vacuum testing of the Solar Probe Plus array design

The Solar Probe Plus (SPP) spacecraft will fly further into the Sun s corona than any previous mission, reaching a minimum perihelion at 9.5 solar radii from the center of the Sun. The solar arrays powering the spacecraft will operate under unusually high irradiances and temperatures. The array design, material choices, and necessary test facilities for SPP are therefore quite different from those used on traditional space panels. This paper gives an overview of the high-irradiance high-temperature vacuum (HIHT-Vac) reliabil ...

Boca, Andreea; Blumenfeld, Philip; Crist, Kevin; De Zetter, Karen; Mitchell, Richard; Richards, Benjamin; Sarver, Charles; Sharps, Paul; Stan, Mark; Tourino, Cory;

Published by: Conference Record of the IEEE Photovoltaic Specialists Conference      Published on:

YEAR: 2012     DOI:

Photovoltaic cells; Probes; Solar cell arrays; Sun; Parker Engineering

Active solar array thermal control system for the solar probe plus spacecraft

The Solar Probe Plus (SPP) spacecraft will orbit the Sun closer than any other previous probe. As dictated by the current mission design, the spacecraft will achieve many perihelia as close as 9.5 RS from the Sun. During those passes, it will encounter a solar flux of ~500 suns, or 70 W/cm2. This flux is more than 50 times larger than the solar heating seen by any previous spacecraft. During the entire mission, the spacecraft and science instruments will be protected by a Thermal Protection System (TPS), and elect ...

Ercol, Carl; Guyette, Greg; Cho, Wei-Lin;

Published by: 42nd International Conference on Environmental Systems 2012, ICES 2012      Published on:

YEAR: 2012     DOI:

Cooling; Cooling systems; Flight control systems; Probes; Solar cell arrays; Spacecraft; Thermoelectric equipment; Waste heat; Parker Engineering

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:

YEAR: 2012     DOI:

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:

YEAR: 2012     DOI:

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:

YEAR: 2012     DOI:

Battery management systems; Charging (batteries); Electric power system control; NASA; Orbits; Probes; Secondary batteries; Solar cell arrays; Space flight; Parker Engineering

A review of the Solar Probe Plus dust protection approach

The Solar Probe Plus (SPP) spacecraft will go closer to the Sun than any manmade object has gone before, which has required the development of new thermal and micrometeoroid protection technologies. During the 24 solar orbits of the mission, the spacecraft will encounter a thermal environment that is 50 times more severe than any previous spacecraft. It will also travel through a dust environment previously unexplored, and be subject to particle hypervelocity impacts (HVI) at velocities much larger than anything previously e ...

Mehoke, Douglas; Brown, Robert; Swaminathan, P.K.; Kerley, Gerald; Carrasco, Cesar; Iyer, Kaushik;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2012     DOI:

Dust; Earth (planet); Interplanetary flight; Particle size analysis; Probes; Space debris; Spacecraft; Parker Engineering

Hyper velocity protection developments on the solar probe plus mission

The Solar Probe Plus (SPP) spacecraft will go closer to the Sun than any manmade object has gone before. The mission includes both solar flux and micrometeoroid environments much more severe than anything experienced by previous spacecraft. As a result, new analytical and testing methodologies are being developed to ensure the success of the mission. One of the major efforts is the development of an analytical approach for hypervelocity impacts (HVI) at speeds up to 300 km/s. To date, this dust study has made several notable ...

Mehoke, Douglas; Swaminathan, P.K.; Carrasco, Cesar; Brown, Robert; Iyer, Kaushik;

Published by: Proceedings of the International Astronautical Congress, IAC      Published on:

YEAR: 2012     DOI:

Cooling systems; Dust; Earth (planet); Equations of state; Interplanetary flight; Probes; Thermoelectric equipment; Parker Engineering

Modeling and simulation of the solar probe plus spacewire virtual data bus

The Solar Probe Plus (SPP) mission will study the Sun s corona, one of the last unexplored regions of the solar system. The spacecraft will carry a complement of instruments closer to the Sun than any spacecraft has ever ventured. The mission concept calls for a minimum perihelion of 9.5 solar radii over an extended campaign of in-situ and simultaneous remote observations. To meet the power, mass, fault management and electromagnetic interference constraints of the mission, the SPP spacecraft architecture uses SpaceWire as t ...

Mick, Alan;

Published by: Proceedings of the International Astronautical Congress, IAC      Published on:

YEAR: 2012     DOI:

Avionics; Buses; Codes (symbols); Data handling; Digital storage; Discrete event simulation; Electromagnetic pulse; Internet protocols; Memory architecture; Network architecture; Probes; Refining; Response time (computer systems); Spacecraft; Sun; System buses; Parker Engineering

Use of hydrocode modeling to develop advanced MMOD shielding designs

A multi-physics computations-based methodology for space debris hypervelocity impact (HVI) damage mitigation is presented. Specifically, improved debris mitigation through development of innovative, lightweight structural designs is described. The methodology has been applied to the design of the Solar Probe Plus (SPP) spacecraft to mitigate extreme solar microdust hypervelocity impacts (50-300 km/s) by the Johns Hopkins University Applied Physics Laboratory (JHU/APL). The methodology combines hydrocode computations of the c ...

Iyer, Kaushik; Swaminathan, P.K.; Mehoke, Douglas; Carrasco, Cesar; Brown, Robert; Batra, Romesh;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2012     DOI:

Space debris; Structural design; Parker Engineering

2011

LEON3FT proton SEE test results for the solar probe plus program

The Solar Probe Plus program requires a low power microprocessor with demonstrated capability to resist SEE in a high proton flux environment. Proton tests conducted at IUCF successfully demonstrated the single bit error correction capability of the LEON3FT. The test setup and results are summarized. © 2011 IEEE.

Pham, Chi; Malcom, Horace; Maurer, Richard; Roth, David; Strohbehn, Kim;

Published by: IEEE Radiation Effects Data Workshop      Published on:

YEAR: 2011     DOI:

Error correction; Probes; Software testing; Parker Engineering

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:

YEAR: 2011     DOI:

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:

YEAR: 2011     DOI:

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:

YEAR: 2011     DOI:

Gallium compounds; Heat shielding; NASA; Orbits; Probes; Solar cell arrays; Space flight; Parker Engineering

2010

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:

YEAR: 2010     DOI:

Atomic absorption spectrometry; Dust; Light scattering; NASA; Probes; Solar system; Space flight; Stars; Parker Engineering

The Solar Probe Plus solar array development and design

The Solar Probe Plus (SPP) spacecraft will orbit as closely as 9.5 solar radii from the sun; so close that its thermal protection shield (TPS) will reach a peak temperature of 1,400C. To work in this environment, the solar array will use pressurized water cooling and operate in the penumbra formed by the TPS at a 68° angle of incidence. Even with these mitigations, the array will be subject to extremely high intensity and temperature. This paper will summarize the array s environment, present a preliminary design, outlin ...

Gaddy, Edward; Decker, Rob; Lockwood, Mary; Roufberg, Lew; Knutzen, Gayle; Marsh, Danielle;

Published by: Conference Record of the IEEE Photovoltaic Specialists Conference      Published on:

YEAR: 2010     DOI:

Orbits; Probes; Parker Engineering

Ceramic coatings for the solar probe plus mission

A study was conducted to develop the coatings needed to protect the Solar Probe Plus Thermal Protection System (TPS) from the harsh environment. The TPS encountered harsh environment during its mission close to the sun, facing significant solar fluxes. The first part of the study addressed the way a coating s microstructure affected its optical properties and the way coatings were designed to maintain the right microstructure over temperature. The study was led by a researcher from the Advanced Technology Laboratory of the W ...

Mehoke, D.; Congdon, E.; , Drewry; Eddins, C.; Deacon, R.; Wolf, T.; Hahn, D.; King, D.; Nagle, D.; Buchta, M.; Zhang, D.; Hemker, K.; Spicer, J.; Jones, J.; Ryan, S.; Schlichter, G.;

Published by: Johns Hopkins APL Technical Digest (Applied Physics Laboratory)      Published on:

YEAR: 2010     DOI:

Grain growth; Microstructure; Optical properties; Probes; Parker Engineering

Solar Probe Plus Reference Vehicle spacecraft

Solar Probe Plus (SPP) will be the first mission to fly into the Sun s lower corona as close as 9.5 solar radii from the center of the sun. Launching no later than 2018, the mission will reveal how the corona is heated and how the solar wind is accelerated, solving two fundamental mysteries that have been top-priority science goals for many decades. The SPP Reference Vehicle spacecraft, described in this paper, accommodates the Science and Technology Definition Team reference payload, and demonstrates feasibility and technol ...

Lockwood, Mary;

Published by: AIAA SPACE Conference and Exposition 2010      Published on:

YEAR: 2010     DOI:

Probes; 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:

YEAR: 2010     DOI:

Carbon; Interplanetary flight; magnetic fields; Microwave antennas; NASA; Probes; Solar cell arrays; Solar wind; Temperature; Parker Engineering

An active cooling system for the solar probe power system

The Solar Probe Plus (SPP) spacecraft will orbit the Sun closer than any other previous probe. As dictated by the current mission design, the spacecraft will achieve many perihelia as close as 9.5 RS from the Sun. During those passes, it will encounter a solar flux of ~500 suns, or 70 W/cm2. This flux is more than 50 times larger than the solar heating seen by any previous spacecraft. During the entire mission, the spacecraft and science instruments will be protected by a Thermal Protection System (TPS) ...

Lockwood, Mary; Ercol, Carl; Cho, Wei-Lin; Hartman, David; Adamson, Gary;

Published by: 40th International Conference on Environmental Systems, ICES 2010      Published on:

YEAR: 2010     DOI:

Cooling; Cooling systems; Orbits; Probes; Spacecraft; Testing; Thermoelectric equipment; Waste heat; 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:

YEAR: 2010     DOI:

Heat shielding; Heat transfer; NASA; Optical coatings; Probes; Thermal insulating materials; Thermal variables control; Parker Engineering

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:

YEAR: 2010     DOI:

Carbon; Carbon carbon composites; Heat shielding; NASA; Probes; Space flight; Parker Engineering



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