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  (6)
  • 1980-1984  (6)
  • 1
    facet.materialart.
    Unknown
    Drives and benefits overview (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The major technology issues for an advanced orbital transfer vehicles (OTV) engine to be used in conjunction with a space based, reusable orbit transfer vehicle are discussed. The results of the space station studies as they relate to the OTV and the ground rules and guidelines for a reusable OTV vehicle study are reviewed. The technology drives and benefit categories such as mission versatility, increased reliability or reduced cost are presented. The technology drivers and the associated benefits are covered with regard to relative significance and impact on the ongoing OTV engine technology program. It is recommended that because of the broad range of mission requirements and the long term potential cost benefits a new engine is needed for the space based reusable OTV.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA. Lewis Research Center OTV Propulsion Issues; p 103-112
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Experimental studies of scaling laws for plasma collection at high voltages (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Current-voltage characteristics were determined for stainless steel in a laboratory with a simulated ionospheric environment of 5 x 10 to the 11th to 2.5 x 10 to the 12th electrons/cu m. Panels with areas differing by a factor of up to 100 were biased between 0 and -2300 V. Secondary emission was corrected for using experimental data. The results indicate that the current-voltage characteristics are almost linear and that for voltages above about -500 V the current scales with characteristic panel length as L exp 1.2. Comparison with some theoretical predictions is discussed. Because of orbital velocity associated ion ram effects, the results of this study must be used with caution when applied to an orbiting spacecraft.
    Keywords: PLASMA PHYSICS
    Type: Journal of Spacecraft and Rockets (ISSN 0022-4650); 21; 287-292
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Time maintenance of user clocks via the tracking and data relay satellite system (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A system is described which uses the Tracking and Data Relay Satellite System (TDRSS) itself to compare the user satellite clock with a clock at the White Sands station that is referenced to Universal Time Coordinated (UTC). No command of the spacecraft by the system is required, and actual on-board clock corrections are made by the spacecraft control center at its discretion. Computer models were constructed using basic orbital parameters for user and TDRS satellites. With only first-order corrections and simple averaging techniques for constant clock rates, error measurement precision of better than one microsecond was obtained. More sophisticated computations should allow considerable improvement over this.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Proc. of the 14th Ann. Precise Time and Time Interval (PTTI) Appl. Planning Meeting; p 39-56
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Some Eulerian and Lagrangian diagnostics for a model stratospheric warming (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Eliassen-Palm (EP) cross sections for the model are discussed. EP cross sections conveniently display the principal eddy fluxes of heat, momentum, and quasi-geostrophic potential vorticity on one diagram. The EP diagnostics are used to follow the evolution of the mean flow through into the second stage of the model warming, which includes the reversal of the polar westerlies and which appears to have more in common with observed warmings. The transformed Eulerian-mean equations presented by Andrews and McIntyre (1976, 1978) provide the basis for an investigation in which an especially clear picture of the warming dynamics is obtained. In the second stage of the model warming, the decelerating torque per unit mass is large throughout a deep layer in the middle atmosphere, spanning several scale heights.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 38; Apr. 198
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Computer program documentation for the pasture/range condition assessment processor (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The processor which drives for the RANGE software allows the user to analyze LANDSAT data containing pasture and rangeland. Analysis includes mapping, generating statistics, calculating vegetative indexes, and plotting vegetative indexes. Routines for using the processor are given. A flow diagram is included.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10100 , NASA-CR-167746 , EW-L2-04340 , JSC-18265 , NAS 1.26:167746 , LEMSCO-18627
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    Explosive materials equivalency, test methods and evaluation (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Attention is given to concepts of explosive equivalency of energetic materials based on specific airblast parameters. A description is provided of a wide bandwidth high accuracy instrumentation system which has been used extensively in obtaining pressure time profiles of energetic materials. The object of the considered test method is to determine the maximum output from the detonation of explosive materials in terms of airblast overpressure and positive impulse. The measured pressure and impulse values are compared with known characteristics of hemispherical TNT data to determine the equivalency of the test material in relation to TNT. An investigation shows that meaningful comparisons between various explosives and a standard reference material such as TNT should be based upon the same parameters. The tests should be conducted under the same conditions.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: In: Measurement and testing methods for propellants and explosives; International Annual Meeting; Jun 25, 1980 - Jun 27, 1980; Karlsruhe
    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...