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Browsing Geophysical Institute by Issue Date

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Browsing Geophysical Institute by Issue Date

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  • Wilcox, John B.; Kohls, Fred F.; Cronin, Harold (University of Alaska. Geophysical Institute., 1950-06-30)
    For purposes of studying the character of time fluxuations in arctic night sky brightness, we have erected a photoelectric monitory system at the Ballaine’s Lake Field Station (latitude N64°52', longitude W147°49'). ...
  • Mukherjee, Nalin R. (Geophysical Institute at the University of Alaska, 1952-11-15)
    Since the concentration of the ozone in the atmosphere near the earth's surface is of the order of 10 gm. per gm. of air, the quantitative determination of this ozone by chemical methods is rather difficult. Therefore, ...
  • Cain, Joseph C. (Geophysical Institute at the University of Alaska, 1953-11-30)
    The Chapman-Miller method of calculating harmonic coefficients for luni-solar daily variations is here applied to the hourly values of the magnetic elements at Sitka, Alaska for the period 1902-1952. The formation of the ...
  • Unknown author (Geophysical Institute at the University of Alaska, 1954)
    This report briefly describes the progress made at the Geophysical Institute of the University of Alaska during the past three months, in the study of arctic radio wave propagation under the Air Force Contract No. AF 19(604)-1089.
  • Andersen, Soren; Leonard, Robert S. (Geophysical Institute at the University of Alaska, 1955)
    A discussion of the design for a new antenna system for the transmitter stations is presented together with the measurements and power computation made on the old and new antennas. In the 12 mc back-scatter program at ...
  • Owren, Leif; Stark, Robert (Geophysical Institute at the University of Alaska, 1955)
    Signal intensity operations have stopped and the preliminary reduction of all field intensity records completed . The 12 me back-scatter equipment is described and operating conditions stated. Tentative interpretations of ...
  • Sugiura, Masahisa (Geophysical Institute at the University of Alaska, 1955-04-20)
    The morphology of magnetic storms that has been investigated by S. Chapman since 1918 was further extended with more material as regards both the number of storms and the number of observatories, Three hundred and ...
  • Little, C.G. (Geophysical Institute at the University of Alaska, 1955-08-15)
    The report is divided into six main sections. The first five deal in turn with the five main Tasks specified in the contract; the sixth describes three other phases of work also concerned with radio wave propagation in ...
  • Elvey, C.T. (Geophysical Institute at the University of Alaska, 1955-09)
  • Davis, T.N.; Elvey, C.T. (Geophysical Institute at the University of Alaska, 1955-10)
    The "All-Sky" camera herein described is an outgrowth of camera* operated in Alaska by the staff of the Geophysical Institute. The principle has been of use in cloud studies and was first used by C. W. Gar tie in for ...
  • Owren, Leif; Leinbach, Harold; Nichols, B.; Stark, R.; Smith, Carol (Geophysical Institute at the University of Alaska, 1956)
    TASK A: TRANSMISSION OF HIGH FREQUENCY RADIO WAVES VIA THE ARCTIC IONOSPHERE The experimental data collected from June, 1949, through October, 1955, under "Experiment Aurora" are summarized in tables and diagrams, and ...
  • Little, C.G.; Dyce, R.B.; Hessler, V. P.; Leonard, R. S.; Owren, L.; Roof, R. B.; Sugiura, M.; Swenson, G. W. Jr (Geophysical Institute at the University of Alaska, 1956)
    The main body of this report is divided into eight sections, corresponding to the eight aspects of Arctic radio wave propagation listed in Section I, Purposes of the Contract, In cases where the work has already been ...
  • Elvey, C.T. (Geophysical Institute at the University of Alaska, 1956-01-26)
    On February 18, 1954, we held a conference attended by representatives of military organizations in Alaska to discuss general problems of radio communications in the Arctic. Since that conference was so successful, we ...
  • Elvey, C. T.; Belon, Albert (Geophysical Institute at the University of Alaska, 1957)
    The earlier orbits and ephemerides for the Soviet satellites were not sufficiently accurate to be very useful in making observations in Alaska. Extrapolations from our own observations gave better predictions. This merely ...
  • Little, C. G. (Geophysical Institute at the University of Alaska, 1957-01-28)
    Introduction: The discovery by Jansky in 1932 of the presence of radio waves incident upon the earth from outer space has led to several new methods of studying the earth's upper atmosphere. This report describes ...
  • Brittin, Wesley Emil (Geophysical Institute at the University of Alaska, 1957-04)
  • Sugiura, Masahisa; Chapman, Sydney (Geophysical Institute at the University of Alaska, 1957-06-30)
    Some average characteristics are determined for 136 moderate magnetic storms with sudden commencements that occurred during the interval 1902-1945. The average storm field is resolved for different epochs of storm time ...
  • Nichols, B. (Geophysical Institute at the University of Alaska, 1957-07)
    The primary subject of this report is the drift motions of auroral ionization. The existence of rapid motions of the ionization has been demonstrated in previous radar studies of the aurora, but neither the nature of ...
  • Hessler, V. P.; Franzke, A. R. (Geophysical Institute at the University of Alaska, 1957-11)
  • Abbott, W. N. (Geophysical Institute at the University of Alaska, 1958-02-14)
    I. INTRODUCTION The earlier orbits and ephemerides for the Soviet satellites were not sufficiently accurate to be very useful in making observations in Alaska. Extrapolations from our own observations gave better ...

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