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  • 1
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    Robotic Lunar Lander Concept (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN56727 , International Space Development Conference; May 24, 2018 - May 27, 2018; Los Angeles, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    On-Time Performance ASPM Non-Parametric Statistical Analysis (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The purpose of this analysis is to provide a data-driven examination of two selected flight metrics, i.e., (1) total taxi-out time and (2) actual off time minus scheduled off block time. More specifically, Aviation System Performance Metrics (ASPM) data were analyzed to determine any possible differences in CLT (Charlotte Douglas International Airport) departure flights on these two metrics when comparing pre-IADS (Integrated Arrival, Departure, and Surface Operations) against post-IADS metering operations. This was originally presented to the ATD-2 (Airspace Technology Demonstration-2) Analytics team in August 2018.
    Keywords: Air Transportation and Safety
    Type: ARC-E-DAA-TN61129 , Airspace Technology Demonstration 2 (ATD-2) Tech Transfer; Sep 14, 2018; Moffett Field, CA; United States
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    NASA TECHNICAL REPORTS
  • 3
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    Humans and Robots to Mars: Overview of Mars Study Capability Mars Plans (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: M18-6985 , AIAA Space Forum; Sep 17, 2018 - Sep 19, 2018; Orlando, FL; United States
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    NASA TECHNICAL REPORTS
  • 4
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    Low-Latency Teleoperations for Human Exploration and Evolvable Mars Campaign (2015)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: NASA has been analyzing a number of mission concepts and activities that involve low-latency telerobotic (LLT) operations. One mission concept that will be covered in this presentation is Crew-Assisted Sample Return which involves the crew acquiring samples (1) that have already been delivered to space, and or acquiring samples via LLT from orbit to a planetary surface and then launching the samples to space to be captured in space and then returned to the earth with the crew. Both versions of have key roles for low-latency teleoperations. More broadly, the NASA Evolvable Mars Campaign is exploring a number of other activities that involve LLT, such as: (a) human asteroid missions, (b) PhobosDeimos missions, (c) Mars human landing site reconnaissance and site preparation, and (d) Mars sample handling and analysis. Many of these activities could be conducted from Mars orbit and also with the crew on the Mars surface remotely operating assets elsewhere on the surface, e.g. for exploring Mars special regions and or teleoperating a sample analysis laboratory both of which may help address planetary protection concerns. The operational and technology implications of low-latency teleoperations will be explored, including discussion of relevant items in the NASA Technology Roadmap and also how previously deployed robotic assets from any source could subsequently be used by astronauts via LLT.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN23785 , SpaceOps 2015 Workshop; Jun 10, 2015 - Jun 12, 2015; Rome; Italy
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    NASA TECHNICAL REPORTS
  • 5
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    Modeling Terrestrial Planetary Atmospheres with ROCKE-3D (2018)
    In:  CASI
    Details
    Publication Date: 2019-09-11
    Description: I will discuss recent work showing the capabilities of ROCKE-3Dto model the atmospheres of a diverse range of terrestrial worlds from tidallylocked Proxima Centauri b to the ancient Moon.Some emphasis will be placed on ancient Venus simulations thatmay indicate that its present atmospheric state is more tied tothe global-scale resurfacing event of the past Gy than to its proximity to a gradually warming sun over the past 4Gy.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN61063 , Tokyo Area Planetary Meeting; Sep 07, 2018; Tokyo; Japan
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  • 6
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    Venus: The First Habitable World of Our Solar System? (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A great deal of effort in the search for life off-Earth in the past 20+ years has focused on Mars via a plethora of space and ground based missions. While there is good evidence that surface liquid water existed on Mars in substantial quantities, it is not clear how long such water existed. Most studies point to this water existing billions of years ago. However,those familiar with the Faint Young Sun hypothesis for Earth will quickly realize that this problem is even more pronounced for Mars. In this context recent simulations have been completed with the GISS 3-D GCM (1) of paleo Venus (approx. 3 billion years ago) when the sun was approx. 25 less luminous than today. A combination of a less luminous Sun and a slow rotation rate reveal that Venus could have had conditions on its surface amenable to surface liquid water. Previous work has also provided bounds on how much water Venus could have had using measured DH ratios. It is possible that less assumptions have to be made to make Venus an early habitable world than have to be made for Mars, even thoughVenus is a much tougher world on which to confirm this hypothesis.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN27812 , Astronomdagarna; Oct 22, 2015 - Oct 24, 2015; Upssala; Sweden
    Format: application/pdf
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  • 7
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    Benefit Opportunities for Integrated Surface and Airspace Departure Scheduling: A Study of Operations at Charlotte-Douglas International Airport (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA is collaborating with the FAA and aviation industry to develop and demonstrate new capabilities that integrate arrival, departure, and surface air-traffic operations. The concept relies on trajectory-based departure scheduling and collaborative decision making to reduce delays and uncertainties in taxi and climb operations. The paper describes the concept and benefit mechanisms aimed at improving flight efficiency and predictability while maintaining or improving operational throughput. The potential impact of the technology is studied and discussed through a quantitative analysis of relevant shortfalls at the site identified for initial deployment and demonstration in 2017: Charlotte-Douglas International Airport. Results from trajectory analysis indicate substantial opportunity to reduce taxi delays for both departures and arrivals by metering departures at the gate in a manner that maximizes throughput while adhering to takeoff restrictions due mostly to airspace constraints. Substantial taxi-out delay reduction is shown for flights subject to departure restrictions stemming from traffic flow management initiatives. Opportunities to improve the predictability of taxi, takeoff, and climb operations are examined and their potential impact on airline scheduling decisions and air-traffic forecasting is discussed. In addition, the potential to improve throughput with departure scheduling that maximizes use of available runway and airspace capacity is analyzed.
    Keywords: Air Transportation and Safety
    Type: ARC-E-DAA-TN30199 , Digital Avionics Systems Conference (DASC); Sep 25, 2016 - Sep 29, 2016; Sacramento, CA; United States
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    NASA TECHNICAL REPORTS
  • 8
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    Ice Accretion Measurements on an Airfoil and Wedge in Mixed-Phase Conditions (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper describes ice accretion measurements from experiments conducted at the National Research Council (NRC) of Canada's Research Altitude Test Facility during 2012. Due to numerous engine power loss events associated with high altitude convective weather, potential ice accretion within an engine due to ice crystal ingestion is being investigated collaboratively by NASA and NRC. These investigations examine the physical mechanisms of ice accretion on surfaces exposed to ice crystal and mixed phase conditions, similar to those believed to exist in core compressor regions of jet engines. A further objective of these tests is to examine scaling effects since altitude appears to play a key role in this icing process.
    Keywords: Air Transportation and Safety
    Type: GRC-E-DAA-TN23445 , 2015 SAE International Conference on Icing of Aircraft, Engines, and Structures; Jun 22, 2015 - Jun 25, 2015; Prague; Czechoslovakia
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    NASA TECHNICAL REPORTS
  • 9
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    Insight Science Team Meeting Project Status (2016)
    In:  Other Sources
    Details
    Publication Date: 2019-12-24
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: JPL-CL-16-2199 , InSight Science Team; May 23, 2016; Toulouse; France
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Redetection of the Ionospheric H3(+) Signature of Saturn's "Ring Rain" (2017)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Abstract In April 2011 Saturn's midlatitude ionospheric H3(+) emissions were detected, exhibiting anomalous (nonsolar) H3(+) latitudinal variations consistent with the transport of water from specific locations in Saturn's rings, known as ''ring rain'' . These products, transported to the planet along the magnetic field, may help to explain the unusual pattern of peaks and troughs in electron densities discovered in Saturn's ionosphere by spacecraft flybys. In the present study, we analyzed H3(+) emissions recorded on 23 April 2013, showing for the first time since the original detection that Saturn's midlatitude H3(+) emissions are indeed heavily modified. Although the 2013 emissions are dimmer by almost a factor of 3.7, the latitudinal contrast is greater and uncertainties are lower. Increased H3(+) intensities were found near planetocentric latitudes of 43 deg, 51 deg, and 63 deg, previously identified with sources at the inner edge of the B ring, A ring, and the orbit of Enceladus and associated E ring.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN51748 , Geophysical Research Letters (ISSN 0094-8276) (e-ISSN 1944-8007); 44; 23; 11,762-11,769
    Format: text
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