PSP Bibliography


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Found 8 entries in the Bibliography.

Showing entries from 1 through 8


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:

YEAR: 2017     DOI:

Computer software selection and evaluation; Digital radio; Digital signal processing; Instrument testing; Interplanetary flight; NASA; Probes; radio receivers; Software radio; Verification; 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:

YEAR: 2016     DOI:

Additive noise; Interplanetary flight; NASA; Radio navigation; Software radio; 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:

YEAR: 2016     DOI:

Automation; Clocks; NASA; Probes; Remote control; Signal receivers; Signal to noise ratio; Testing; Wages; Parker Engineering

The Frontier software-defined radio for the solar probe plus mission

The latest adaptation of the Frontier Radio, an X/Ka-band deep space implementation, has been transitioned into a finished product for Solar Probe Plus (SPP) and future missions. Leveraging the technology readiness level (TRL) 9 software-defined radio (SDR) platform successfully flown on the Van Allen Probes (VAP) mission, the Frontier Radio now brings a low-power, low-mass, yet highly radiation-tolerant and robust SDR to deep space applications. This implementation brings with it a suite of enhanced capabilities and improve ...

Haskins, Christopher; Angert, Matthew; Sheehi, Joseph; Millard, Wesley; Adams, Norman; Hennawy, Joseph;

Published by: IEEE Aerospace Conference Proceedings      Published on:

YEAR: 2016     DOI:

Analog circuits; Application programs; Firmware; Interplanetary flight; Ionizing radiation; Manufacture; Power amplifiers; Probes; radio; radio receivers; signal processing; Space applications; 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:

YEAR: 2014     DOI:

Interplanetary flight; NASA; 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


Autonomous loop switching: Interpreting and modifying the internal state of feedback tracking loops

Adams, Norman; Millard, Wesley; Copeland, David;

Published by:       Published on:

YEAR: 2012     DOI: 10.1109/AERO.2012.6187143

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