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    Rotating Detonation Rocket Engine Concept Development

    Doug Perkins | NTRS | 2025
    Publisher: Springer Nature (United States)

    Electrodynamic Regolith Conveyor

    Aaron Olson | NTRS | 2024
    abrasive nature of Lunar regolith. A prototype conveyor has been developed for laboratory testing in a simulated Lunar gravity environment using a ...

    Rediscovering Apollo Biomedical Data to Support Artemis: The Apollo Records Synthesis Project

    Robert S Beaton / Brenna K Wheeler / Sara C Jorgensen et al. | NTRS | 2024
    poster will discuss the progress of the project, give context to the dual research-clinical care nature of the records, and highlight the ...

    A Distributed Simulation Framework Applied to Artemis Analysis, Studies, Integration, and Test

    Edwin Z Crues / Paige A Whittington / Keaton C Dodd et al. | NTRS | 2024
    services like communications, environment, visualization, and data logging. ADS’s distributed nature allows for the complex aggregation of ...

    Flight Simulator Demonstration and Certification Implications of Powertrain Failure Mitigation in a Partial Turboelectric Aircraft

    Jonathan S. Litt / Jonah J. Sachs-Wetstone / Donald L. Simon et al. | NTRS | 2023
    powertrain. The complexity and integrated nature of the partial turboelectric powertrain architecture presents failure modes and hazards not found in ...

    Modeling and Simulation of a Parallel Hybrid Electric Regional Aircraft for the Electrified Powertrain Flight Demonstration (EPFD) Program

    Gokcin Cinar / Yu Cai / Russell K Denney et al. | NTRS | 2023
    optimized power and energy management strategy. The parametric nature of the work enables the design space exploration for electrification and lays ...

    In Situ Sensors for Monitoring the Space Environment and Its Effect Upon Satellite Materials

    Jim Barrie / Irina Gouzman / Ryan Hoffmann et al. | NTRS | 2023
    of materials/environment interactions is less well understood than optimum owing to the complex nature of the space environment and the ...

    The Assembly, Test, and Integration of LOFTID (Low-Earth Orbit Flight Test of an Inflatable Decelera-tor)

    R.J. Bodkin / Robert Akamine / Hillary Blakely et al. | NTRS | 2023
    from the iterative nature of Payload Adapter devel-opment with the partners at ULA. Preparations to integrate the main segments of the LOFTID ...

    4. Parallels in Communication and Navigation Technology and Natural Phenomenon

    Robert Romanofsky | NTRS | 2022
    This chapter represents an introspective search for hidden connections between technology and nature and inadvertent influence on ...

    System-Level Control Concepts for Electrified Aircraft Propulsion Systems

    Donald L Simon | NTRS | 2022
    burn, emissions, and noise. Due to their complex integrated nature, EAP systems present novel propulsion control challenges and opportunities ...

    Astrophysics Biennial Technology Report 2022

    Rachel B Rivera | NTRS | 2022
    APD undertakes space missions to explore the nature of the universe at its largest scales, its earliest moments, and its most extreme ...

    Clean Air Shower Curtain for Protection of Contamination Sensitive Telescopes on the Ariane 5 Launcher

    Marco Calcabrini / Alan Chichester Abeel / Eve M Wooldridge et al. | NTRS | 2022
    unique nature of the JWST mission led to various adaptations of the Ariane 5 launch system to fulfill stringent cleanliness and hygrometry ...

    Geodetic Investigations of the Mission Concept MAGIC to Reveal Callisto’s Internal Structure

    Antonio Genova / David E Smith / Robin Canup et al. | NTRS | 2022
    , despite the presumed presence of a sub-surface ocean. These properties make Callisto uniquely able to constrain the timing and nature of the ...

    Nickel Accounting for the Psyche Spacecraft

    Cullinan, Joe / Lawrence, David / Kokorowski, Michael et al. | NTRS | 2022
    interference (EMI) tape, under gold plating, in connectors, and so on. The task proved further challenging because of the distributed nature of the ...

      Nickel Accounting for the Psyche Spacecraft

      Cullinan, Joe / Lawrence, David / Kokorowski, Michael et al. | NTRS | 2022
      interference (EMI) tape, under gold plating, in connectors, and so on. The task proved further challenging because of the distributed nature of the ...

    Design of Solar Sailing Trajectories Resilient to Safe Mode Events

    Johnson, Les / Heaton, Andrew / Laipert, Frank et al. | NTRS | 2021
    Solar sails are an enabling technology for stand-alone small-satellite deep-space exploration. However, their always-on nature, combined ...

    Psyche Science Planning with the Science Opportunity Analyzer

    Elkins-Tanton, Linda T. / Dailis, Matthew / Alonge, Eleanor K. et al. | NTRS | 2021
    to (16) Psyche: a metallic asteroid believed to be the exposed core of an early planetesimal. Despite the unique nature of the target ...

    CubeSAT Security Attack Tree Analysis

    Santangelo, Andrew / Viswanathan, Arun A / Falco, Greg | NTRS | 2021
    vehicles, conduct reconnaissance and other finite tasks. The specialized nature of many CubeSat missions do not make their security any less ...

    On-Orbit Cryogenic Refueling: Potential Mission Benefits, Associated Orbital Mechanics, and Fuel Transfer Thermodynamic Modeling Efforts

    Justin Ronald Clark | NTRS | 2021
    The placement of cryogenic fuel/propellant depot stations in Earth orbit has the potential to transform the nature and operations for many ...

    Expected Thrust Fraction: Resilient Trajectory Design Applied to the Earth Return Orbiter

    Laipert, Frank / Sood, Rohan / Rubinsztejn, Ari | NTRS | 2021
    embeds their stochastic nature into a time-varying duty cycle. This paper investigates the application of expected thrust fraction to the Earth ...

    Volatiles Investigating Polar Exploration Rover (VIPER)

    Anthony Colaprete | NTRS | 2021
    team will use the instrument data to characterize the nature of the volatiles in the area and to extrapolate these data to create global lunar ...

    Solar-power for Deep Space Science Missions

    Carolyn R Mercer | NTRS | 2021
    missions and nearly ubiquitous in commercial telecommunications satellites. The increasing complexity of science missions investigating the nature ...

    Go-Around Criteria Refinement for Transport Category Aircraft

    Angela M. Campbell / Petrus M. T. Zaal / Somil R. Shah et al. | NTRS | 2021
    such as airspeed, position, and rate of descent. At times, pilots do not comply with these criteria, perhaps owing to their conservative nature ...

    COSMOS in the 2020s: Helping to Unveil the Nature of Dark Energy

    Masters, Dan C | NTRS | 2020

    Science of the Moon

    Jennifer Edmunson / Heidi Haviland | NTRS | 2020
    of the Moon, reserve potential for in-situ resources, and the nature of the volatiles on the Moon. ...
    Publisher: Springer Nature Switzerland AG

    Small Unmanned Aircraft System Off Nominal Operations Reporting System Unmanned Aircraft System: Traffic Management Technical Capability Level 4 Implementation, Data Collection and Analysis

    Jung, Jaewoo / Rios, Joseph L. / Drew, Charles R. et al. | NTRS | 2020
    understand their nature and reduce occurrences. This Technical Memorandum (TM) describes the reporting system and analysis of 116 off-nominal ...

    Prospectives in Deep Space Infrastructures, Development, and Colonization

    Bushnell, Dennis M. / Moses, Robert W. | NTRS | 2020
    enable them, and envisions the nature of space developments beyond GEO going forward. ...

    Flutter Analysis with Stabilized Finite Elements Based on the Linearized Frequency-Domain Approach

    Kevin E Jacobson / Bret K Stanford / Stephen L Wood et al. | NTRS | 2020
    cost compared to the linear aerodynamic methods. By taking advantage of the periodic nature of flutter, frequency-domain methods offer a more ...

    Power and Propulsion Element (PPE) Spacecraft Reference Trajectory Document

    Melissa L Mcguire / Steven L Mccarty / Laura M Burke | NTRS | 2020
    cislunar orbit transfer and end-of-mission (EOM) disposal trajectory. The flexibility of electric propulsion offers, by its low thrust nature ...

    Designing Trajectories Resilient to Missed Thrust Events Using Expected Thrust Fraction

    Laipert, Frank E. / Sood, Rohan / Sandel, Carrie Grace et al. | NTRS | 2020
    use of expected thrust fraction, which embeds the stochastic nature of missed thrust events into a deterministic optimal control problem. The ...

    Urban Air Mobility: Predictive Modelling on the Behavior of Air-Service Bookings in Metropolitan Areas

    Srushti Adesara / Harbani Jaggi / Annie Lee et al. | NTRS | 2020
    effect on Generation Z, has given way to the nature of impulsive decision making. The 2020 COVID-19 crisis, with its use of tap-to-gratify ...

    Lunar Water ISRU Measurement Study (LWIMS): Establishing a Measurement Plan for Identification and Characterization of a Water Reserve

    Julie Kleinhenz / Amy McAdam / Anthony Colaprete et al. | NTRS | 2020
    materials have been identified at both lunar poles, butthe nature and extent of this resource is not well understood. Identification of the presence ...

    Communication-Aware Orbit Design for Small Spacecraft Swarms around Small Bodies

    Rahmani, Amir / Croix, Jean-Pierre de la / Mote, Mark et al. | NTRS | 2020
    communications; we then leverage the differentiable nature of the proposed algorithm to accelerate a gradient-based global search algorithm. Numerical ...

    Enabling Dynamic Vehicle Analyses With Improved Atmospheric Attenuation Models in Glenn Research Center Communication Analysis Suite

    Vitez, Cory T. / Welch, Bryan W. | NTRS | 2020
    path length and the exponential nature of low-elevation scintillation. User-defined weather parameters were also added to the updated ...

    Design and Testing of an Ultra-Light Weight Perching System for Sloped or Vertical Rough Surfaces on Mars

    Backus, Spencer / Izraelevitz, Jacob / Quan, Justin et al. | NTRS | 2020
    unmodified young features (e.g. walls of fresh craters or polar pits that are actively expanding). However the steep nature of these sites makes ...

    Adaptive Airborne Separation to Enable UAM Autonomy in Mixed Airspace

    Cotton, William B. | NTRS | 2020
    homogeneous nature of the traffic operating in UTM airspace. This paper expands that concept to include a traffic management plan usable at all ...

    Apollo Next Generation Sample Analysis (ANGSA): A Segue to the Next Era of Lunar Exploration and Sample Return Activities

    Julie Mitchell / Francis M McCubbin / Charles K Shearer et al. | NTRS | 2020
    ANGSA and Artemis programs, illustrating the complementary nature of the work for both. We will describe the efforts to date in designing ...

    Operations Concept for Responding to Urgent Requests for NASA-ISRO Synthetic Aperture Radar (NISAR)

    Sharma, Priyanka / Doubleday, Josh R. / Mohr, Dave et al. | NTRS | 2020
    requests. Given the ‘best-efforts’ nature of this requirement, a few highlevel guidelines have been developed to help guide the formulation of the ...

    Strategic Deconfliction Performance: Results and Analysis from the NASA UTM Technical Capability Level 4 Demonstration

    Joseph L. Rios / Jeffrey Homola / Nicholas Craven et al. | NTRS | 2020
    area are typically assigned priority status given the nature of their mission and their associated credentials. The ability to perform ...

    The Amazing Blue Dot: How Earth's Biology Is Inspiring Engineering for the Stars

    Gregg, Christine | NTRS | 2019

    Future of Flight: Flying Cars to X-Planes

    Van Dalsem, William R. | NTRS | 2019
    are overview in nature and have been presented previously in open forums. ...

    NASA & Ames Research Center Introduction

    Van Dalsem, William R. | NTRS | 2019
    are overview in nature and have been presented previously in open forums. ...

    NASA Wallops Overview of Rideshare Mission Integration Capability

    Wilcox, David A. | NTRS | 2019
    experience with previous programs of similar nature and highlights examples of recent projects that have ideally positioned Wallops to play a ...

    Using telemetry to navigate the MarCO cubesats to Mars

    Martin-Mur, Tomas / Young, Brian | NTRS | 2019
    , descent, and landing at Mars. Due to their small size and experimental nature, extensive use of telemetry beyond that commonly used by deep space ...

    Integration of analyses in an EMC control plan for avionics hardware in space applications

    Perez, Reinaldo | NTRS | 2019
    practices to achieve optimum EMC. The design of an EMC Control Plan for space avionics requires unique challenges due to the nature of the space ...

    Inflight Parachute Measurement Challenge

    Daum, Jared / Comis, Aaron | NTRS | 2019
    flight test instrumentation is difficult due the flexible nature of parachute components, packing requirements, and high forces and chaos during ...

    Instrumentation Needs of Inflatable Space Structures

    Litteken, Doug | NTRS | 2019
    the structural loads in both ground and flight tests. Because of the nature of fabric structures, SHM techniques need to be soft, flexible ...

    Space Traffic Management with a NASA UAS Traffic Management (UTM) Inspired Architecture

    Murakami, David / Nag, Sreeja / Lifson, Miles et al. | NTRS | 2019
    to a civil agency), and the growth in rideshare and small launch vehicles illustrate the rapidly changing nature of this domain. This paper ...

    Summary of the NASA Large Constellations Parametric Study

    Vavrin, Andrew / Manis, Alyssa / Liou, J. C. et al. | NTRS | 2019
    orbital debris problem. To better understand the nature of the problem, the NASA Orbital Debris Program Office (ODPO) recently completed a ...

    In-Time Non-Participant Casualty Risk Assessment to Support Onboard Decision Making for Autonomous Unmanned Aircraft

    Ancel, Ersin / Capristan, Francisco M. / Foster, John V. et al. | NTRS | 2019
    identification of the changing nature of this risk can inform decision making processes to mitigate current and impending situations. ...

    Propulsion System Optimization for a Turboelectric Tiltwing Urban Air Mobility Aircraft

    Hendricks, Eric S. / Aretskin-Hariton, Eliot D. / Chapman, Jeffryes W. et al. | NTRS | 2019
    , and multidisciplinary in nature. New challenges exist in identifying and creating optimized designs for these unique vehicles with new ...

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