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  • 1
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    Development of the JSC Thematic Mapper quick-look preprocessing capability (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The development of a preprocessing unit for Landsat Thematic Mapper (TM) data for the Earth Observations Data Laboratory at Johnson Space Center is reported. The background of the project is sketched, including the greatly increased data-handling requirements compared to MSS, the influence of the JPL VICAR system on the system design, and the completeness of the GSFC SCROUNGE (LASLIB) TM data tapes. The design approach and realization are discussed, and the performance and transportability of the preprocessor programs (totaling about 2000 lines of source code in FORTRAN and IBM Assembly languages) are indicated. The system is able to read the TM image tapes, extract areas of interest to particular studies, and register the extracted imagery to suitable references. Ancillary programs include image enhancement, rotation, filtering and pixel-size modification.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Registration of a synthetic aperture radar image to Thematic Mapper imagery for remote sensing applications (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Multiple Thematic Mapper multitemporal acquisitions from Landsat and one synthetic-aperture radar acquisition from Seasat have been precisely registered using Johnson Space Center registration processors. The registered images have been output in the Universal Transverse Mercator projection. The procedure to accomplish such disparate data processing tasks and the registration accuracy evaluation are discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-22; 557-563
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    NASA TECHNICAL REPORTS
  • 3
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    Mass properties of a rigid structure (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Program MASPROP rapidly calculates mass properties of complex, rigid structural systems. Its basic premise is that complex systems can be adequately described by combination of basic elementary structural shapes.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: LAR-12454 , NASA Tech Briefs (ISSN 0145-319X); 4; 3; P. 429
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    NASA TECHNICAL REPORTS
  • 4
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    Building a Solar System Internet (2018)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: This presentation is expected to be given during the scheduled Communications Technology and Development discussion in the University Student Design Challenge (2). It is an introduction to various challenges inherent to the construction of networks in space. The presentation also includes both an overview of networking in general, as well as approaches taken to the construction of delay- and disruption- tolerant networks.
    Keywords: Space Communications, Spacecraft Communications, Command and Tracking
    Type: GRC-E-DAA-TN52368 , E-19485 , University Student Design Challenge; Jan 31, 2018; Cleveland, OH; United States
    Format: application/pdf
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  • 5
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    A Proton-Cyclotron Wave Storm Generated by Unstable Proton Distribution Functions in the Solar Wind (2016)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: We use audification of 0.092 seconds cadence magnetometer data from the Wind spacecraft to identify waves with amplitudes greater than 0.1 nanoteslas near the ion gyrofrequency (approximately 0.1 hertz) with duration longer than 1 hour during 2008. We present one of the most common types of event for a case study and find it to be a proton-cyclotron wave storm, coinciding with highly radial magnetic field and a suprathermal proton beam close in density to the core distribution itself. Using linear Vlasov analysis, we conclude that the long-duration, large-amplitude waves are generated by the instability of the proton distribution function. The origin of the beam is unknown, but the radial field period is found in the trailing edge of a fast solar wind stream and resembles other events thought to be caused by magnetic field footpoint motion or interchange reconnection between coronal holes and closed field lines in the corona.
    Keywords: Solar Physics; Acoustics
    Type: GSFC-E-DAA-TN30960 , The Astrophysical Journal; 819; 1 Witer; 6
    Format: text
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  • 6
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    In-Space Networking on NASA's SCAN Testbed (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The NASA Space Communications and Navigation (SCaN) Testbed, an external payload onboard the International Space Station, is equipped with three software defined radios and a flight computer for supporting in-space communication research. New technologies being studied using the SCaN Testbed include advanced networking, coding, and modulation protocols designed to support the transition of NASAs mission systems from primarily point to point data links and preplanned routes towards adaptive, autonomous internetworked operations needed to meet future mission objectives. Networking protocols implemented on the SCaN Testbed include the Advanced Orbiting Systems (AOS) link-layer protocol, Consultative Committee for Space Data Systems (CCSDS) Encapsulation Packets, Internet Protocol (IP), Space Link Extension (SLE), CCSDS File Delivery Protocol (CFDP), and Delay-Tolerant Networking (DTN) protocols including the Bundle Protocol (BP) and Licklider Transmission Protocol (LTP). The SCaN Testbed end-to-end system provides three S-band data links and one Ka-band data link to exchange space and ground data through NASAs Tracking Data Relay Satellite System or a direct-to-ground link to ground stations. The multiple data links and nodes provide several upgradable elements on both the space and ground systems. This paper will provide a general description of the testbeds system design and capabilities, discuss in detail the design and lessons learned in the implementation of the network protocols, and describe future plans for continuing research to meet the communication needs for evolving global space systems.
    Keywords: Computer Programming and Software; Space Communications, Spacecraft Communications, Command and Tracking
    Type: GRC-E-DAA-TN36085 , AIAA International Communications Satellite Systems Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, OH; United States|Ka and Broadband Communications Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, OH; United States
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  • 7
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    Architecture for Cognitive Networking within NASAs Future Space Communications Infrastructure (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Future space mission concepts and designs pose many networking challenges for command, telemetry, and science data applications with diverse end-to-end data delivery needs. For future end-to-end architecture designs, a key challenge is meeting expected application quality of service requirements for multiple simultaneous mission data flows with options to use diverse onboard local data buses, commercial ground networks, and multiple satellite relay constellations in LEO, MEO, GEO, or even deep space relay links. Effectively utilizing a complex network topology requires orchestration and direction that spans the many discrete, individually addressable computer systems, which cause them to act in concert to achieve the overall network goals. The system must be intelligent enough to not only function under nominal conditions, but also adapt to unexpected situations, and reorganize or adapt to perform roles not originally intended for the system or explicitly programmed. This paper describes architecture features of cognitive networking within the future NASA space communications infrastructure, and interacting with the legacy systems and infrastructure in the meantime. The paper begins by discussing the need for increased automation, including inter-system collaboration. This discussion motivates the features of an architecture including cognitive networking for future missions and relays, interoperating with both existing endpoint-based networking models and emerging information-centric models. From this basis, we discuss progress on a proof-of-concept implementation of this architecture as a cognitive networking on-orbit application on the SCaN Testbed attached to the International Space Station.
    Keywords: Space Communications, Spacecraft Communications, Command and Tracking
    Type: GRC-E-DAA-TN35064 , AIAA International Communications Satellite Systems Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, OH; United States|Ka and Broadband Communications Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, OH; United States
    Format: application/pdf
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  • 8
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    In-Space Networking On NASA's SCaN Testbed (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The NASA Space Communications and Navigation (SCaN) Testbed, an external payload onboard the International Space Station, is equipped with three software defined radios (SDRs) and a programmable flight computer. The purpose of the Testbed is to conduct inspace research in the areas of communication, navigation, and networking in support of NASA missions and communication infrastructure. Multiple reprogrammable elements in the end to end system, along with several communication paths and a semi-operational environment, provides a unique opportunity to explore networking concepts and protocols envisioned for the future Solar System Internet (SSI). This paper will provide a general description of the system's design and the networking protocols implemented and characterized on the testbed, including Encapsulation, IP over CCSDS, and Delay-Tolerant Networking (DTN). Due to the research nature of the implementation, flexibility and robustness are considered in the design to enable expansion for future adaptive and cognitive techniques. Following a detailed design discussion, lessons learned and suggestions for future missions and communication infrastructure elements will be provided. Plans for the evolving research on SCaN Testbed as it moves towards a more adaptive, autonomous system will be discussed.
    Keywords: Space Communications, Spacecraft Communications, Command and Tracking
    Type: GRC-E-DAA-TN35066 , Ka and Broadband Communications Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, Ohio; United States|AIAA International Communications Satellite Systems Conference; Oct 18, 2016 - Oct 20, 2016; Cleveland, Ohio; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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