| Final Report for Contract N00014-80-C-0826, May 1980 - June 1981 |
JUL 1981 |
7 pages |
| Authors:
Theodore J. Pepin; WYOMING UNIV LARAMIE DEPT OF PHYSICS AND ASTRONOMY
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 | This report summarizes the progress made on the engineering definition of the POAM (Polar Ozone and Aerosol Measurement) Experiment. (Author) |
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| Comparison of the Dynamic Processes during Major and Minor Stratospheric Warmings In A Numerical Model |
JUN 1981 |
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| Authors:
James Howard Davenport; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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 | In this study we have analyzed the processes involved in a major and minor warming based on data generated from a 31-layer primitive equation spectral model consisting of a 5-layer troposphere, 12-layer stratosphere and 14-layer mesosphere. The forcing of the model consisted of orographic features designed to simulate the major Northern Hemisphere continents. This gave a combination of wave number 1 and wave number 2 forcing. The analysis of the ... |
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| The STP/S3-4 Satellite Experiment: High Latitude Large Scale Density Irregularities |
26 MAY 1981 |
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| Authors:
P. Rodriguez; M. Singh; E. P. Szuszczewicz; D. N. Walker; J. C. Holmes; NAVAL RESEARCH LAB WASHINGTON DC
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| Large scale density irregularities in the nighttime auroral zone F- region are routinely detected by a pair of pulsed plasma probes on the s3-4 satellite. The absolute density variations can be as large as an order of magnitude and in the case of a quiet diffuse aurora, the irregularities appear to be consistent with the sheet-like structures that have been postulated to explain high latitude scintillation enhancements. In a more ... |
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| VLF/LF Reflectivity of the Polar Ionosphere |
MAR 1981 |
95 pages |
| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Ralph E. Gifford; Wayne I. Klemetti; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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| This report provides a summary of high-latitude ionospheric reflectivity data, as observed by the USAF high-resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. Riometer and magnetometer measurements of the polar propagation environment are presented as supplementary data. (Author) |
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| Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
FEB 1981 |
73 pages |
| Authors:
Abbas M. Sinnarwalla; T. R. Sundaram; T S ASSOCIATES INC COLUMBIA MD
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| The U.S. Coast Guard is evaluating the use of divers under ice as one means of oil-spill surveillance in arctic and subarctic regions. The degree of thermal protection provided to the diver by presently approved suits, which are made of neoprene foam lined on one or both sides by nylon fabric, under the combined action of oil, water and frigid temperature is not known. The present report describes the results ... |
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| Growth of First-Year Sea Ice, Eclipse Sound, Baffin Island, Canada |
FEB 1981 |
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| Authors:
n. k. sinha; M. Nakawo; NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BUILDING RESEARCH
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| A simple numerical integration method has been developed for predicting growth of ice under snow cover where solar radiation does not play a dominant role. The method is capable of incorporating variations in snow conditions and physical properties of ice and snow during the growth period. Theoretical predictions compare favourably with field observations in Eclipse Sound, Baffin Island, for the winter seasons of 1977-78 and 1978-79. (AA) |
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| Auroral X-Ray Contamination of the Low Energy Proton Spectrometer on the S3-2 Satellite in the Polar Regions. |
31 JAN 1981 |
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| Authors:
Richard P. Boyle; Daniel R. Parsignault; EMMANUEL COLL BOSTON MA
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| The Low Energy Proton Spectrometer (LEPS) on board the Air Force S3-2 polar orbiting satellite recorded, at polar latitudes, high anomalous counts coming from the auroral zone direction, over the December 1975 through April 1976 operational period. Despite the low sensitivity of the Si(Li) LEPS detector to X-rays, bremsstrahlung from precipitating electrons in the hundred keV energy range is given as the source of these observations. |
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| Mapping the Climate |
19 JAN 1981 |
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| Authors:
Irving I. Gringorten; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| For suitable graphical presentation of the climate, it is requisite that the mesoscale climate of a region, as small as 2 or 3 sq km or as large as 10,000 sq km, be described in sufficient detail to distinguish notable differences within the area. To this end, the construction of azimuthal equal- area maps is developed to achieve a high of degree of conformality, as well as accuracy in the ... |
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| Magnetospheric and Geomagnetic Activity during the First Year (1979) of the SCATHA (P78-2) Satellite Operation |
DEC 1980 |
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| Authors:
Ching-I. Meng; JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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| This report consists of two parts. The first is a comprehensive analysis of the geomagnetic field variations observed by several networks of ground-based stations to monitor the magnetospheric conditions during the first year of the SCATHA satellite operation in 1979, together with the determination of the most disturbed and quietest days during the 1979 period. The second part is a summary of the scientific results in the investigation of polar ... |
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| Theories of Notation and Polar Motion I, |
Dec-1980 |
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| Authors:
Helmut Moritz; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE
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| The present report attempts a systematic presentation and review of modern theories of the earth's rotation (precession, nutation, and polar motion) for a rigid earth, a purely elastic earth, and the Poincare model consisting of a rigid mantle and a liquid core. Emphasis is on the treatment of an elastic earth on the basis of Liouville's equation and on the consideration of the earth's rotation as an eigenvalue problem. (Author) ... |
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| VLF/LF Reflectivity of the Polar Ionosphere, 6 January - 3 May 1980, |
OCT 1980 |
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| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Ralph E. Gifford; Wayne I. Klemetti; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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| This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. Riometer and magnetometer measurements of the polar propagation environment are presented as supplementary data. (Author) |
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| Temperature Profiles in the Barnes Ice Cap, Baffin Island, Canada, and Heat Flux from the Subglacial Terrane |
SEP 1980 |
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| Authors:
Roger LeB. Hooke; E. Calvin Alexander Jr.; Robert J. Gustafson; MINNESOTA UNIV MINNEAPOLIS DEPT OF GEOLOGY AND GEOPHYSICS
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| Temperature measurements were made in 7 boreholes, ranging in depth from 50-276 m, in the Barnes Ice Cap. Holes B4, D4, and T0975 are approximately 1 km from the margin and an average of 8 km apart. Holes T091, T081, T061, and T020 lie along a 10.2 km flow line passing through T0975. Temperature profiles are convex upward in all holes except T020, reflecting the combined effects of longitudinal and ... |
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| An Investigation of HF Propagation Over an Auroral Sub-Auroral Path. |
SEP 1980 |
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| Authors:
J. B. Dawes; ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
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| Methods of determining the usable frequencies over a particular auroral subauroral path such that digital data may be sent uncorrupted, are described. Tests took place between April and July 1980 using transmissions between Northern Norway and Southern England. Computer programs were used in order to determine the viability of linearly interpolating the ionospheric propagation parameters from sub-auroral areas to an auroral or polar zone. One of these programs was written ... |
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| An Investigation of HF Direction-Finding Accuracy on the Churchill-Ottawa Auroral Zone Path. |
JUL 1980 |
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| Authors:
G. O. Venier; COMMUNICATIONS RESEARCH CENTRE OTTAWA (ONTARIO)
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| The CRC HF Direction-Finding Array, consisting of a 1181 meter by 236 meter cross, was used to make angle-of-arrival measurements on HF waves propagated over a 1900 km path from Churchill, Manitoba to Ottawa, in May, 1976. This path is of interest because much of it is in the auroral zone where conditions are generally more disturbed than at lower latitudes. Swept-frequency transmissions allowed the investigation of the variations in ... |
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| An Investigation of HF Direction-Finding Accuracy on the Frobisher Bay-Ottawa Auroral Zone Path. |
JUL 1980 |
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| Authors:
G. O. Venier; COMMUNICATIONS RESEARCH CENTRE OTTAWA (ONTARIO)
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| The CRC HF direction-finding array, consisting of a 1181 meter by 236 meter cross, was used to make angle of arrival measurements of waves transmitted over a 2100 km path whose mid point was near the centre of the auroral zone. Swept-frequency transmissions allowed the investigation of the angle variations of individual propagation modes, and fixed-frequency transmissions permitted the measurement of Doppler shifts as well as the sampling of the ... |
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| Four Years of Low Altitude Sea Ice Broadband Backscatter Measurements |
JUL 1980 |
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| Authors:
R. G. Onstott; R. K. Moore; S. Gogineni; C. Delker; KANSAS UNIV CENTER FOR RESEARCH INC LAWRENCE REMOTE SENSING LAB
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| The ability to use radar to discriminate Arctic Sea ice types has been investigated using surface-based and helicopter-borne scatterometer systems. The surface-based FM/CW radar operated at 1.5 GHz and at multiple frequencies in the 8-18 GHz region. Measurements were made at angles of 10 degrees to 70 degrees from nadir. The helicopter-based radar operated at the 8- 18 GHz frequencies with incidence angles of 0 degrees to 60 degrees. Extensive ... |
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| Study of Magnetospheric Currents and Resultant Surface Magnetic Variations. |
17 APR 1980 |
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| Authors:
C. -K CHEN; R. A. Wolf; M. Harel; J. L. Karty; R. W. Spiro; RICE UNIV HOUSTON TX
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| We have completed computer simulations of the inner magnetosphere, for the substorm-type event of 19 September 1976. Several computer runs have been performed, with various sets of input parameters. Data from the Air Force S3-2 satellite and ground magnetometers were used for model inputs. Model predictions were analyzed and exhaustively compared with data from the S3-2 satellite, the AFGL magnetometer chain and many other sources. Agreement between theory and data ... |
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| Ionospheric Modeling and Propagation Analysis. |
APR 1980 |
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| Authors:
David C. Miller; Joseph Gibbs; ARCON CORP WALTHAM MA
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| This report describes several studies and the development of computer techniques toward improving the capability of predicting and assessing HF propagation through the ionosphere. These studies included the development of vertical electron density models which can accurately represent observed oblique and vertical ionograms. These models have been represented by a series of functions which describe the individual ionospheric layers and which are analytically integratable to yield expected ray path trajectories. ... |
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| A Model for High Frequency Radar Auroral Clutter, |
MAR 1980 |
111 pages |
| Authors:
Terence J. Elkins; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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| A model is developed to permit estimation of the effects of irregularities in the auroral ionosphere in producing clutter experienced by Over-The Horizon radars operating at high geomagnetic latitudes. The model is used on various sources of data, including auroral radar (HF, VHF, UHF), vertical incidence ionosondes, satellite particle detectors, and optical sensors (ground-based and satellite-borne). The model addresses both the amplitude and Doppler components of auroral radar clutter and ... |
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| Air Deployed Oceanographic Mooring (ADOM). |
28 FEB 1980 |
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| Authors:
NEW HAMPSHIRE UNIV DURHAM MARINE SYSTEMS ENGINEERING LAB
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| Technology is currently being developed for the unmanned deployment of oceanographic sensors from an aircraft in two regions of the world's oceans; the open ocean and the polar seas. A wide variety of scientific investigations can be persued with air deployed oceanographic moorings which can be configured to meet specific scientific requirements. Two corresponding systems are being developed to meet these scientific needs; an open ocean ADOM and an artic ... |
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| E and F Layer H.F. Volume Backscatter Reflectivities. |
FEB 1980 |
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| Authors:
Edward N. Richards; William C. McComish; BOSTON COLL CHESTNUT HILL MA SPACE DATA ANALYSIS LAB
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| H.F. radar backscatter data from an OTH radar site in northern Maine have been processed to produce estimates of E and F layer volume backscatter reflectivities. Nighttime returns were selected from the months of September and October and were sorted into evening and midnight time segments for active and quiet days. The reflectivities were analyzed for dependence on geomagnetic coordinates, as well as for dependence on frequency and auroral conditions. ... |
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| Spherical Antennas having Isotropic Radiation Patterns. |
22 JAN 1980 |
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| Authors:
Charles M. DeSantis; Felix Schwering; DEPARTMENT OF THE ARMY WASHINGTON DC
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| Spherical antenna arrangements are disclosed utilizing annular slots in polar regions which are associated with resonant cavities having a TE sub 01 mode or a TE sub 11 mode of field distribution. This field distribution within the cavity produces a cosine field distribution around the annular slot which serves via proper cavity excitation to produce nearly hemispherical isotropic radiation characteristics. The resonant cavities may take on the form of a ... |
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| VLF/LF Reflectivity of the Polar Ionosphere 6 May-1 September 1979, |
JAN 1980 |
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| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Robert L. Cooley; Wayne I. Klemetti; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
|
| This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. Measurements of polar propagation environment by a magnetometer and a riometer are presented as supplementary data. (Author) |
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| Proposed Mechanism to Explain a Semi-Annual Variation in the Winds in the Polar Mesosphere |
1980 |
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| Authors:
A. D. Belmont; CONTROL DATA CORP MINNEAPOLIS MN
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| A Method for Direct Determination of Real Height from Virtual Height Data for the Auroral Region of the Ionosphere. |
14 NOV 1979 |
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| Authors:
Milton M. Klein; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| As part of an effort to determine electron density profiles in the auroral region of the ionosphere, a method has been developed for directly calculating real height from virtual height data obtained at high latitudes. The essential ingredient of the method is the representation of the curved portion of the ordinary ray dispersion curve by an analytic form which reduces the virtual height - real height integral relation to a ... |
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| 1979 Summer Study Program in Geophysical Fluid Dynamics at the Woods Hole Oceanographic Institution, Notes on Polar Oceanography. Volume II. Lectures of the Fellows. |
NOV 1979 |
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| Authors:
Melvin E. Stern; Florence K. Mellor; WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
|
| This volume contains the manuscripts of research lectures by the nine fellows of the summer program. Some reports are obviously related to the main theme; some are related to crucial physical processes in the Polar Oceans; some are pure fluid dynamics or related to particular educational goals of the fellows. These lecture reports have not been edited or reviewed in a manner appropriate for published papers, but we hope that ... |
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| High-Latitude Scintillation Morphology, Alaskan Sector. |
01 OCT 1979 |
53 pages |
| Authors:
Stephen J. Matthews; Charles L. Rino; SRI INTERNATIONAL MENLO PARK CA
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| This report describes the auroral-zone scintillation morphology as deduced from two years of observations made at Poker Flat, Alaska, using the DNA Wideband satellite. The data confirm that magnetic activity is the principal factor in determining the level of both nighttime and daytime auroral-zone scintillation. No systematic seasonal variation in activity was found, although the second year (1977-1978) showed a significant increase in overall activity when compared with the first ... |
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| ELF Sferic Occurrences in the Antarctic during a Solar Proton Event: Case Study of Occurrences at Byrd Station during the Event of 9 June 1968. |
19 SEP 1979 |
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| Authors:
A. C. Fraser-Smith ; R. A. Helliwell; STANFORD UNIV CALIF STANFORD ELECTRONICS LABS
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| Electromagnetic waves with frequencies above the extremely-low-frequency range (ELF; frequencies in the range 5 Hz-3KHz) are susceptible to a variety of solar proton event (SPE) effects when propagating through a polar region in the earth-ionosphere waveguide. These effects appear to become less severe as the frequency of the waves becomes smaller and approaches the ELF range. Although measurements have been lacking, it would be expected that ELF wave propagation through ... |
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| The Precipitating Electron Detectors (SSJ/3) for the Block 5D/Flights 2-5 DMSP Satellites: Calibration and Data Presentation. |
AUG 1979 |
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| Authors:
M. S. Gussenhoven ; D. A. Hardy ; A. Huber; WEBB ASSOCIATES INC YELLOW SPRINGS OHIO
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| The work under this contract had as its goal the time-dependent phenomenological modleing of the polar cap regions. The vehicle for modeling the caps has been to analyze the following collection of data: DMSP images showing polar cap auroras; DMSP electron measurements; hourly averages of the interplanetary magnetic field; ground magnetometer data from Thule; and magnetic indices. DMSP images from the winters of 1972-1973 and 1974-1975 provided consistently good records ... |
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| Extremely High Latitude Auroras. Part I. |
AUG 1979 |
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| Authors:
M. Susan Gussenhoven; RHODE ISLAND UNIV KINGSTON DEPT OF MATHEMATICS
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| The work under this contract had as its goal the time-dependent phenomenological modeling of the polar cap regions. The vehicle for modeling the caps has been to analyze the following collection of data: DMSP images showing polar cap auroras; DMSP electron measurements; hourly averages of the interplanetary magnetic field; ground magnetometer data from Thule; and magnetic indices. DMSP images for the winters of 1972-1973 and 1974-1975 provided consistently good records ... |
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| The Optical Properties of Young Sea Ice, |
AUG 1979 |
|
| Authors:
Donald Kole Perovich; WASHINGTON UNIV SEATTLE DEPT OF ATMOSPHERIC SCIENCES
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| Eight laboratory experiments were performed to determine the optical properties of young salt ice and to examine correlations between the optical properties and the state of the ice. Ice grown at different temperatures (-10, -20, -30, and -37 C) and from water of different salinities (0, 16, and 31 0/00) was investigated. The experiments were conducted using a tank system which was designed to grow ice similar to that found ... |
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| Satellite Atmospheric Radiance Measurements in the Vacuum Ultraviolet. |
05 JUL 1979 |
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| Authors:
R. E. Huffman ; F. J. LeBlanc ; J. C. Larrabee ; D. E. Paulsen; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| A satellite experiment has obtained nadir-viewing atmospheric radiance measurements in the 1100 to 2900 angstrom wavelength region from the polar orbiting satellite S3-4. This report describes the instrumentation, measurement techniques, and initial results. The observed emission is from airglow, solar scatter, and auroral regions. Spectral and spatial measurements previously unavailable have been made for the nitrogen Lyman-Birge-Hopfield emission, vacuum ultraviolet aurora, hydrogen geocorona, tropical ultraviolet airglow, twilight fluorescence nitric oxide ... |
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| VLF/LF Reflectivity of the Polar Ionosphere, 3 September - 30 December 1978, |
MAY 1979 |
|
| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Robert L. Cooley; Wayne I. Klemetti; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
|
| This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. VLF long path propagation measurements, along with magnetometer and riometer data, are presented as supplementary data. (Author) |
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| The Occurrence and Geological Implications of Carbon Dioxide Clathrate Hydrate on Mars |
MAY 1979 |
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| Authors:
Gary Anthony Armistead; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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| Analysis of the temperatures and pressures at the Viking Lander 2 site (VL-2) during the presence of surface ice condensate shows that the ice partially converted to carbon dioxide clathrate hydrate on at least several occasions. The occurrence of CO2 hydrate at the VL-2 latitude indicates that ground ice and surface ice at latitudes nearer the poles would convert to hydrate during the Martian winter. The conversion of ice to ... |
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| Air Deployed Oceanographic Mooring (ADOM). |
APR 1979 |
|
| Authors:
EG AND G WASHINGTON ANALYTICAL SERVICES CENTER INC ROCKVILLE MD
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| This report documents the technological accomplishments in the Air Deployed Oceanographic Mooring (ADOM) program during 1978. Technology is being developed for deploying oceanographic sensors from an aircraft in two regions of the world's oceans: the open ocean and the polar seas. Two corresponding systems are being developed: an open ocean ADOM and an Artic ADOM. Both systems are presently configured to measure temperature, conductivity, and pressure. The actions, further analysis, ... |
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| VLF/LF Reflectivity of the Polar Ionosphere, 23 April - 2 September 1978, |
MAR 1979 |
|
| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Wayne I. Klemetti; Robert L. Cooley; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
|
| This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. VLF long path propagation measurements, along with magnetometer and riometer data, are presented as suplementary information. (Author) |
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| Air Deployed Oceanographic Mooring (ADOM). |
28 FEB 1979 |
|
| Authors:
NEW HAMPSHIRE UNIV DURHAM MARINE SYSTEMS ENGINEERING LAB
|
| The Air Deployed Oceanographic Mooring Study (ADOM), sponsored by the Office of Naval Research, through a team of contractors, explores technology for deploying oceanographic sensors from an aircraft in two regions of the world's oceans: In the open ocean; and In the Polar oceans, involving substantial ice cover. This report covers the initial phase of an ADOM Study, performed by the Marine Systems Engineering Laboratory of the University of New ... |
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| The Effect of Ionospheric Scintillations Fading on Aircraft-to-Satellite Communications. |
FEB 1979 |
|
| Authors:
Allen J. Johnson; AIR FORCE AVIONICS LAB WRIGHT-PATTERSON AFB OH
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| Ionospheric scintillation fading on a UHF earth-to-satellite communication link has a strong dependence on season, time-of-day, and geographic location. In the equatorial region + or - 20 deg. from the magnetic equator, 20 to 30 dB fades can be expected 1 to 2 hours after sunset during the equinox period. Airborne terminals may experience fade rates as fast as 1 fade per second to as slow as 1 fade in ... |
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| User Requirements of Solar-Terrestrial Predictions for Spacecraft Applications, |
1979 |
22 pages |
| Authors:
A. L. Vampola; R. Altrock; W. Atwell; R. C. Backstrom; H. B. Garrett; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
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| Engineering at the Ends of the Earth. Polar Ocean Technology for the 1980's. |
1979 |
|
| Authors:
NATIONAL RESEARCH COUNCIL WASHINGTON DC MARINE BOARD
|
| Ocean engineering operations in polar waters, particularly in the Arctic, will increase during the foreseeable future as efforts continue to recover commercially valuable resources such as petroleum, fish, and various minerals. The establishment of the 200-mile economic zone already has resulted in a marked increase in the number and capability of fishing ships in the Arctic. A sale of leases for the exploration and production of oil and natural gas ... |
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| A Study of Low Energy Electrons Over the Polar Region by Using the USAF Operational DMSP Satellite. |
DEC 1978 |
|
| Authors:
Kinsey A. Anderson; CALIFORNIA UNIV BERKELEY SPACE SCIENCES LAB
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| Evaluation of an Ambient HF Sky-Wave Propagation Model. |
01 NOV 1978 |
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| Authors:
W. A. Schlueter; MISSION RESEARCH CORP SANTA BARBARA CA
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| The ambient sky-wave propagation model in the HFNET computer program is evaluated by comparing predicted results with those from the widely used HFMUFES4 computer program and data from mid-latitude and auroral region propagation paths. The HFNET propagation model consists of two parts - a geometrical model and an ionospheric parameter model. The HFNET geometrical model uses the virtual height technique with corrections made for ionospheric tilts in and perpendicular to ... |
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| Ionosphere Research. |
30 SEP 1978 |
|
| Authors:
PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB
|
| Contents: Planetary Atmospheres; E and F Region; D-Region; Mass Spectrometer Measurements; Direct Measurements; Atmospheric Reactions; and Particle Collection and Ionosphere Composition Studies Using Rocket Borne Probes. |
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| The Geomagnetic Index Q -- Its Persistence, Predictability, and Other Pertinent Properties. |
18 SEP 1978 |
|
| Authors:
Alfred E. Reilly; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MASS
|
| The persistence and predictability of the geomagnetic index Q are demonstrated. The other important properties of this index are described. The immediate use and widespread utility of the results are indicated. (Author) |
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| Undersea Pipelines and Cables in Polar Water, |
SEP 1978 |
|
| Authors:
Malcolm Mellor; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| Special environmental factors that influence the design, laying and maintenance of undersea pipelines and cables in polar waters are described. Various approaches to the protection of submarine pipes and cables are considered, and prime emphasis is given to burial techniques for shallow water. A wide range of methods for trenching and burying are discussed, and technical data are given. (Author) |
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| VLF/LF Reflectivity of the Polar Ionosphere: 1 January - 22 April 1978, |
AUG 1978 |
|
| Authors:
Robert P. Pagliarulo; John P. Turtle; John E. Rasmussen; Wayne I. Klemetti; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
|
| This report provides a summary of high latitude ionospheric reflectivity as observed by the USAF high resolution VLF/LF ionosounder operating in northern Greenland. Ionospheric reflectivity parameters, including reflection heights and coefficients, are presented as a function of time of day. VLF long path propagation measurements, along with magnetometer and riometer data, are presented as supplementary information. (Author) |
|
| Ionospheric Modeling and Propagation Analysis. |
JUL 1978 |
|
| Authors:
David C. Miller; Joseph Gibbs; ARCON CORP WALTHAM MA
|
| This report describes several studies performed toward improving our knowledge of the properties of High-Frequency communication circuits. These studies included the development of three dimensional electron density models and the analysis of various propagation modes in the ionosphere. Several vertical electron density models were constructed that proved to be useful in both global and polar region HF applications. Improvements were made to existing models for individual ionospheric layer parameters. Some ... |
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| Preferred Crystal Orientations in the Fast Ice Along the Margins of the Arctic Ocean, |
JUN 1978 |
|
| Authors:
W. F. Weeks; A. J. Gow; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
|
| Field observations of the growth fabrics of the fast and near-fast ice along the coasts of the Beaufort and Chukchi Seas show that, at depths of more than 60 cm below the upper ice surface, the sea ice crystals show striking alignments within the horizontal plane. At one site this alignment was well developed at a depth of 15 cm and in all cases the degree of preferred orientation increased ... |
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| A Physical Mechanism for the Prediction of the Sunspot Number During Solar Cycle 21. |
FEB 1978 |
|
| Authors:
K. H. Schatten; P. H. Scherrer; L. Svalgaard; J. M. Wilcox; STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
|
| On physical grounds it is suggested that the sun's polar field strength near a solar minimum is closely related to the following cycle's solar activity. Four methods of estimating the sun's polar magnetic field strength near solar minimum are employed to provide an estimate of cycle 21's yearly mean sunspot number at solar maximum of 140 + or - 20. This estimates is a first order attempt to predict the ... |
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| Effect of the Ionosphere on Space and Terrestrial Systems |
1978 |
637 pages |
| Authors:
John M. Goodman; NAVAL RESEARCH LAB WASHINGTON DC
|
| Partial Contents; Radiowave Scintillation: Experiments and Mitigation Schemes; Radiowave Scintillation: In Situ Measurements, Modelling, and Channel Simulation; Radio Noise and Radiowave Propagation Between ELF and HF; Spacecraft Charging and Space/Microwave Interactions; Forecasting Studies and Ionospheric Modification; and Ionospheric Effects: Ranging and Navigation Systems; |
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Reports by Keyword(s)
POLAR REGIONS
