8 research outputs found

    Research & Technology Report Goddard Space Flight Center

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    The main theme of this edition of the annual Research and Technology Report is Mission Operations and Data Systems. Shifting from centralized to distributed mission operations, and from human interactive operations to highly automated operations is reported. The following aspects are addressed: Mission planning and operations; TDRSS, Positioning Systems, and orbit determination; hardware and software associated with Ground System and Networks; data processing and analysis; and World Wide Web. Flight projects are described along with the achievements in space sciences and earth sciences. Spacecraft subsystems, cryogenic developments, and new tools and capabilities are also discussed

    Research and Technology Report. Goddard Space Flight Center

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    This issue of Goddard Space Flight Center's annual report highlights the importance of mission operations and data systems covering mission planning and operations; TDRSS, positioning systems, and orbit determination; ground system and networks, hardware and software; data processing and analysis; and World Wide Web use. The report also includes flight projects, space sciences, Earth system science, and engineering and materials

    A Triplet Track Trigger for Future High Rate Collider Experiments

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    The Large Hadron Collider (LHC) will have a major upgrade, called the High Luminosity LHC (HL-LHC), after which the proton beams will collide with around 7 times the design luminosity of the LHC (L = 10^34 cm^-2 s^-1). There are also studies being conducted for a 100 km large circular hadron collider, called the hadron-hadron Future Circular Collider (FCC-hh), for the post LHC era. It aims to collide proton beams with sqrt{s} = 100 TeV and L ∼30 x 10^34 cm^-2 s-^1. High luminosities allow for a detailed study of elusive processes, for example, Higgs pair production, thus enabling direct measurement of the trilinear Higgs self-coupling (λ). In this regard, a generator level study is presented in the thesis using the HH->bbbb physics channel assuming trigger-less readout at FCC-hh. An average pile-up of〈μ〉~1000 (200) is expected at the FCC-hh (HL-LHC) within a vertex region of ∼10 cm. A vast pile-up complicates object reconstruction and forces trigger systems to increase the thresholds of trigger objects to satisfy bandwidth and storage limitations of an experiment. Hence, there is a need for a trigger that makes a smart selection of hard collision events from a sea of pile-up collisions at the earliest possible stage of a trigger system. Track triggers are attractive candidates for such demanding situations as they have a very good pointing resolution (unlike calorimeter triggers) in addition to a good momentum resolution. A new concept, the Triplet Track Trigger (TTT) is proposed to be used at the very first trigger level. It consists of three closely spaced highly granular pixel (preferably monolithic sensors) detector layers at large radii (∼1 m). It uses a very simple and fast track reconstruction algorithm, that can be easily implemented in hardware. TTT tracking performance studies are presented using full Geant4 simulation and reconstruction for the ATLAS Inner Tracker (at HL-LHC) and reference tracker of the FCC-hh. Very good momentum and z-vertex resolution allow grouping of TTT tracks into several bins along the beam-axis, where jet clustering algorithms run in parallel to form TTT-jets. The TTT allows for excellent pile-up suppression for the HH->bbbb multi-jet signature in〈μ〉= 1000 conditions of FCC-hh. A rate reduction from the 40 MHz bunch collision frequency to 1 MHz (4 MHz) is achieved for a trigger efficiency of ∼60% (80%). A corresponding rough estimate on S/sqrt{B} ∼16 (19) is obtained with negligible systematic uncertainties and total integrated luminosity of 30 ab^-1

    Unmanned Aircraft Systems in the Cyber Domain

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    Unmanned Aircraft Systems are an integral part of the US national critical infrastructure. The authors have endeavored to bring a breadth and quality of information to the reader that is unparalleled in the unclassified sphere. This textbook will fully immerse and engage the reader / student in the cyber-security considerations of this rapidly emerging technology that we know as unmanned aircraft systems (UAS). The first edition topics covered National Airspace (NAS) policy issues, information security (INFOSEC), UAS vulnerabilities in key systems (Sense and Avoid / SCADA), navigation and collision avoidance systems, stealth design, intelligence, surveillance and reconnaissance (ISR) platforms; weapons systems security; electronic warfare considerations; data-links, jamming, operational vulnerabilities and still-emerging political scenarios that affect US military / commercial decisions. This second edition discusses state-of-the-art technology issues facing US UAS designers. It focuses on counter unmanned aircraft systems (C-UAS) – especially research designed to mitigate and terminate threats by SWARMS. Topics include high-altitude platforms (HAPS) for wireless communications; C-UAS and large scale threats; acoustic countermeasures against SWARMS and building an Identify Friend or Foe (IFF) acoustic library; updates to the legal / regulatory landscape; UAS proliferation along the Chinese New Silk Road Sea / Land routes; and ethics in this new age of autonomous systems and artificial intelligence (AI).https://newprairiepress.org/ebooks/1027/thumbnail.jp

    Earth Observation Open Science and Innovation

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    geospatial analytics; social observatory; big earth data; open data; citizen science; open innovation; earth system science; crowdsourced geospatial data; citizen science; science in society; data scienc

    Second Annual Workshop on Space Operations Automation and Robotics (SOAR 1988)

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    Papers presented at the Second Annual Workshop on Space Operation Automation and Robotics (SOAR '88), hosted by Wright State University at Dayton, Ohio, on July 20, 21, 22, and 23, 1988, are documented herein. During the 4 days, approximately 100 technical papers were presented by experts from NASA, the USAF, universities, and technical companies. Panel discussions on Human Factors, Artificial Intelligence, Robotics, and Space Systems were held but are not documented herein. Technical topics addressed included knowledge-based systems, human factors, and robotics
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