ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Other Sources  (12)
  • 1975-1979  (6)
  • 1965-1969  (6)
Collection
Source
Keywords
Years
Year
  • 1
    facet.materialart.
    Unknown
    ATS-6 - Cesium bombardment engine north-south stationkeeping experiment (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Two 0.004 N thrust cesium bombardment ion thrustors have been developed and used for north-south stationkeeping in the geostationary Applications Technology Satellite-6 (ATS-6). The thrustor subsystems are mounted on the north and south faces of the earth viewing module such that 0.0026 N of thrust is applied normal to the orbit plane and 0.0036 N is applied radially upward. The change in the orbit inclination of the satellite is maintained at zero by operating the two thrustors alternately so that their thrust components, normal to the orbital plane, are symmetrically applied about the nodal crossings. Initial operation of the thrustors was successful. There was no interference with the satellite communications systems and the predicted spacecraft operating potential was verified. Subsequent trials failed due to a defect in the operation of the propellant reservoirs in zero g. A feed line valve is under development to correct this difficulty.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IEEE Transactions on Aerospace and Electronic Systems; AES-11; Nov. 197
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    The inspector's role in the 5,000,000 mile warranty. (1966)
    In:  Other Sources
    Details
    Publication Date: 2018-12-01
    Description: Inspector role in prelaunch checkout of space system hardware
    Keywords: GENERAL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    An advanced contact ion microthruster system. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Cs contact ion microthruster system design, fabrication and flight qualification, noting control logic/power conditioning unit and electronic packaging
    Keywords: PROPULSION SYSTEMS
    Type: AIAA PAPER 68-552 , AMERICAN INST. OF AERONAUTICS AND ASTRONAUTICS, PROPULSION JOINT SPECIALIST CONFERENCE; Jun 10, 1968 - Jun 14, 1968; CLEVELAND, OHIO|; VUE TECHNIQUE CECLES
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    An advanced contact ion microthruster system. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Cs contact ion microthruster system design, fabrication and flight qualification, noting control logic/power conditioning unit and electronic packaging
    Keywords: PROPULSION SYSTEMS
    Type: AIAA PAPER 68-552 , PROPULSION JOINT SPECIALIST CONFERENCE; Jun 10, 1968 - Jun 14, 1968; CLEVELAND, OH
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    A mission profile life test facility (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A test facility is being prepared for a 16,000 hour mission profile life test of multiple electric propulsion thrust subsystems. The facility will be capable of simultaneously operating three 2.7 kW, 30 cm mercury ion thrusters and their power processing. The facility will permit conduction of a program of long-term tests to document thruster characteristics as a function of time and operating point to allow prediction of thruster performance for any mission profile. The thruster will be tested in a 7m by 10m vacuum chamber. Each thruster will be installed in a separate lock chamber so that it can be extended into, or extracted from the main chamber without violating the vacuum integrity of the other thruster. The thrusters will exhaust into a 3m by 5m frozen mercury target. The target and an array of cryopanels to collect sputtered target material will be liquid nitrogen chilled. Power processor units will be tested in an adjacent 1.5m by 2m vacuum chamber and will be temperature controlled by simulated heat pipes.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: AIAA PAPER 78-671 , International Electric Propulsion Conference; Apr 25, 1978 - Apr 27, 1978; San Diego, CA; US
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    The cesium bombardment engine north-south stationkeeping experiment on ATS-6 (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Two one millipound-thrust cesium bombardment ion thrusters have been developed and integrated on the ATS-F spacecraft for the purpose of demonstrating compatible north-south stationkeeping of a synchronous communication satellite. Preliminary operation of the two thrusters on ATS-6 was completely successful on the first run of each. In addition to verifying operation, the principal accomplishments were the demonstration of a total absence of interference with the communications systems, verification of the predicted spacecraft operating potential, demonstration of compatibility with the star tracker, and demonstration of spacecraft attitude by thrust vectoring. Subsequent attempts to operate the thrusters have not been successful. Analysis indicates that the problem is associated with operation of the propellant reservoirs in zero-g.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 75-363 , American Institute of Aeronautics and Astronautics, Electric Propulsion Conference; Mar 19, 1975 - Mar 21, 1975; New Orleans, LA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Decision-Making and Statistical Standards (1965)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: NASA speech on use of statistical methods in governmental decision making
    Keywords: Statistics and Probability
    Type: HQ-E-DAA-TN71658 , National Governors' Conference; Jul 28, 1965; Minneapolis, MN; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    Preliminary results of the mission profile life test of a 30 cm Hg bombardment thruster (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The paper deals with some preliminary results of the Mission Profile Life Test planned to conduct a program of long-term test segments of 30-cm diameter thrusters and power processing units under computer control. Thruster performance data and other operational characteristics taken at various times during a test segment are compared and the results are evaluated in light of the life-timing mechanisms. Thruster control algorithms are also presented. The first test segment completed 2700 hr of a planned 4000 hr test with a J-series 30-cm thruster. The last 1600 hr used a functional model power processing unit (PPU) operated in vacuum. The thruster-PPU was controlled by a computer with software developed to control start-ups, throttling, and variety of off-normal conditions.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 79-2078 , International Electric Propulsion Conference; Oct 30, 1979 - Nov 01, 1979; Princeton, NJ
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unknown
    An electric propulsion long term test facility (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: An existing test facility was modified to provide for extended testing of multiple electric propulsion thruster subsystems. A program to document thruster subsystem characteristics as a function of time is currently in progress. The facility is capable of simultaneously operating three 2.7-kW, 30-cm mercury ion thrusters and their power processing units. Each thruster is installed via a separate air lock so that it can be extended into the 7m x 10m main chamber without violating vacuum integrity. The thrusters exhaust into a 3m x 5m frozen mercury target. An array of cryopanels collect sputtered target material. Power processor units are tested in an adjacent 1.5m x 2m vacuum chamber or accompanying forced convection enclosure. The thruster subsystems and the test facility are designed for automatic unattended operation with thruster operation computer controlled. Test data are recorded by a central data collection system scanning 200 channels of data a second every two minutes. Results of the Systems Demonstration Test, a short shakedown test of 500 hours, and facility performance during the first year of testing are presented.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: AIAA PAPER 79-2080 , International Electric Propulsion Conference; Oct 30, 1979 - Nov 01, 1979; Princeton, NJ
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    Cesium contact ion microthruster experiment aboard applications technology satellite /ATS/ - iv. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Cesium contact ion microthrustor experiment onboard ATS 4, measuring emission currents and spacecraft potentials
    Keywords: PROPULSION SYSTEMS
    Type: AIAA PAPER 69-297 , AMERICAN INST. OF AERONAUTICS AND ASTRONAUTICS, ELECTRIC PROPULSION CONFERENCE; Mar 03, 1969 - Mar 05, 1969; WILLIAMSBURG, VA|; ST. OF RADIO AND ELE
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...