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
  • Inorganic Chemistry  (752)
  • COMMUNICATIONS  (315)
  • 1970-1974  (1,067)
  • 1972  (1,067)
Collection
Keywords
Publisher
Years
  • 1970-1974  (1,067)
Year
  • 1
    facet.materialart.
    Unknown
    Telemetering in the space program of the 1970's. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Brief review of the history of telemetering since the end of World War II, and discussion of telemetering needs and trends of the 1970's and 1980's. The shift in emphasis from quantity of flight equipments having relatively short lifetimes to quality of flight equipments having very long lifetimes is shown to characterize the main change from the 1960's to the 1970's in telemetering needs. Looking to the 1980's, the possibility is envisioned of the establishment of orbiting space stations capable of generating 1 to 10 trillion digital bits per day.
    Keywords: COMMUNICATIONS
    Type: International Telemetering Conference; Oct 10, 1972 - Oct 12, 1972; Los Angeles, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    The Skylab communications system. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Skylab is an experimental manned space station which will be operated by three astronauts intermittently over eight months in 1973. It will be in a 235 nautical mile, 50 degree inclination orbit. The communication system includes an onboard audio distribution hard-line network with 13 stations; a teleprinter for recording messages from the ground; telemetry, voice and television links; an onboard video distribution network. The radio frequencies system also includes radiometer and scatterometer earth-scanning sensors operating at 13.9 GHz and 1.4 GHz. The overall Skylab Program is discussed briefly and the communications system is described in more detail.
    Keywords: COMMUNICATIONS
    Type: AIAA PAPER 72-543 , American Institute of Aeronautics and Astronautics, Communications Satellite Systems Conference; Apr 24, 1972 - Apr 26, 1972; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Experimental systems in applications technology satellite F&G /ATS F&G/. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Four experimental systems involving use of specific capabilities of applications technology satellites are discussed. These experimental systems are illustrative of potential operational systems based on satellites capable of producing relatively large power fluxes.
    Keywords: COMMUNICATIONS
    Type: AIAA PAPER 72-578 , American Institute of Aeronautics and Astronautics, Communications Satellite Systems Conference; Apr 24, 1972 - Apr 26, 1972; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Remote sensing of atmospheric and surface temperatures with microwaves. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Solids, liquids, and gases emit at microwave wavelengths measurable amounts of black-body thermal radiation. Receiver sensitivities readily approach 0.01 K, and permit accurate measurements of land, sea, and atmospheric temperatures. Sea and land temperature measurements must be corrected for the effects of surface emissivity, but these effects can often be measured or estimated. Observations near the 5 mm wavelength 02 resonances can yield atmospheric temperature profiles with an approximate accuracy of 2 K for altitudes 0-80 km. Such measurements from balloons and aircraft suggest that the planned earth-orbital satellite experiments will yield data valuable for numerical weather prediction. Ground-based radio telescopes and planetary-probes have yielded similar information about the surfaces and atmospheres of other planets.
    Keywords: COMMUNICATIONS
    Type: Symposium on Temperature; Jun 21, 1971 - Jun 24, 1971; Washington, DC
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    On the technology of aerospace communication in multipath. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The mechanism, effects, and modelling of multipath propagation, caused by rough earth reflection, are examined for aerospace communication. Emphasis is on binary digital signalling for aircraft and hybrid vehicles, such as Shuttle. The cases of direct Air-Ground and satellite relay (Aerosat) are treated. The recursive, adaptive, coherent Bayes detector for binary phase-shift-keying in nonselective multipath is presented. The derivation for the frequency-shift-keying detector is indicated.
    Keywords: COMMUNICATIONS
    Type: NTC ''72; National Telecommunications Conference; Dec 04, 1972 - Dec 06, 1972; Houston, TX
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    Environmental data transmission from arctic data buoys via polar orbiting satellite. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: COMMUNICATIONS
    Type: NTC ''72; National Telecommunications Conference; Dec 04, 1972 - Dec 06, 1972; Houston, TX
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Design of communication systems using short-constraint-length convolutional codes. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A method is presented for calculating the effect of carrier-phase reference error in a receiver phase-locked loop on bit error rates in convolutionally coded data, for the practical design of systems using short-constraint-length convolutional codes. A set of design curves shows the relation between design bit error rate, uplink carrier tracking loop SNR, downlink total SNR, and downlink modulation index. These curves make possible rapid and simple system optimization.
    Keywords: COMMUNICATIONS
    Type: NTC ''72; National Telecommunications Conference; Dec 04, 1972 - Dec 06, 1972; Houston, TX
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    ATS-F COMSAT millimeter wave propagation experiment. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Description of the transmitting and receiving system configurations to be used in an ATS-F propagation experiment designed to gather data on the attenuation of satellite uplink signals (at approximately 13.2 and 17.8 GHz) due to atmospheric hydrometeors (mostly rain). The data will be used for statistical determination of system power margins required for operational communications systems at frequencies above 10 GHz. A secondary analysis will study site diversity as a means of reducing the required system margins. A spacecraft transponder receives signals from 15 dual-frequency ground transmitter stations and retransmits these signals to a central ground receiving terminal at a frequency of 4 GHz.
    Keywords: COMMUNICATIONS
    Type: NTC ''72; National Telecommunications Conference; Dec 04, 1972 - Dec 06, 1972; Houston, TX
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unknown
    Trends in NASA communication satellites. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Discussion of the potential applications of satellite communications technology in meeting the national needs in education, health care, culture, and data transfer techniques. Experiments with the NASA ATS 1, 3 and 5 spacecraft, which are conducted in an attempt to satisfy such needs, are reviewed. The future needs are also considered, covering the requirements of multiple region coverage, communications between regions, large numbers of ground terminals, multichannel capability and high quality TV pictures. The ATS F and CTS spacecraft are expected to be available in the near future to expand experiments in this field.
    Keywords: COMMUNICATIONS
    Type: Annual Institute on World Affairs; Aug 07, 1972 - Aug 25, 1972; San Diego, CA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    Advanced study of video signal processing in low signal to noise environments (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The frame to frame correlation properties of the video process are utilized to reduce the mean squared error of the demodulated video where zero mean noise is a factor. An interpolative estimator is used for continuous estimation with the output process delayed in time by one frame. Theoretical development shows that for the model herein developed reduction of the mean squared error by 1.0 to 4.0 db possible for parameter ranges of interest. Interpolative estimation using inter-frame correlation properties of a video process is then applied to the Apollo 17 parameters to yield a model for application on that mission.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-131873
    Format: application/pdf
    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...