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Browsing GI Reports by Title

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  • 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.
  • Owren, Leif; Bates, H. F.; Hunsucker, R. D.; Pope, J. H.; Stark, R. A. (Geophysical Institute at the University of Alaska, 1959-10)
    Two types of direct scatter from the F region are identified on the records from the oblique incidence sweep-frequency sounder located at College, Alaska. One type of echo appears to come from randomly distributed, fi ...
  • Owren, Leif; Little, C. Gordon (Geophysical Institute at the University of Alaska, 1958-03)
    The object of this investigation is to obtain additional information concerning the effects of aurora on high frequency radio signals which is essential to a complete understanding of new modes of propagation that have ...
  • Tryon, Helen M. (Geophysical Institute at the University of Alaska, 1959-11)
  • 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 ...
  • 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 ...
  • Davis, T. Neil (Geophysical Institute at the University of Alaska, 1960-01)
  • Romick, Gerald J. (Geophysical Institute of the University of Alaska, 1961-03)
    The zenith auroral spectra at College, Alaska, obtained during the 1957-1959 observing seasons, has been assembled in catalogue form. The prime purpose of this catalogue is to present the auroral activity in a manner ...
  • Young, M. J. (Geophysical Institute at the University of Alaska, 1959-07-31)
    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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Leonard, Robert S. (Geophysical Institute at the University of Alaska, 1961-04)
    Analysis of data collected by five auroral radars located in Alaska shows the distribution of ionospheric disturbances as a function of time and location. The radars were operated during the IGY and were located in a ...
  • 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. (Geophysical Institute at the University of Alaska, 1960-06-15)
    This report presents College N-S earth current records for the month of July 1959. The scale of 1 inch per hour permits detailed scaling directly from the reproductions in the report. Scalings of hourly range in amplitude ...
  • Hessler, V. P.; Franzke, A. R. (Geophysical Institute at the University of Alaska, 1957-11)
  • Brittin, Wesley Emil (Geophysical Institute at the University of Alaska, 1957-04)
  • Davis, T. N.; Deehr, C. S.; Leinbach, H. (Geophysical Institute of the University of Alaska, 1960-03)
    From photometric, all-sky camera, and visual observations of a moderate auroral display, it is found that the all-sky camera compares favorably with the visual observer in detecting and recording auroral forms. The ...
  • 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, ...

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