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  • Other Sources  (3)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • Computer Programming and Software; Space Communications, Spacecraft Communications, Command and Tracking  (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
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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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
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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