Download or read book Low Frequency Geomagnetic Fluctuations 01 to 3 Hz on the Floor of Monterey Bay written by Edmund J. Chaffee and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a Cs vapor magnetometer, we observed fluctuations of the total magnetic field in the .01 Hz to 3 Hz frequency range on the floor of Monterey Bay, California. Fourteen hours of data were recorded over a period of six months in 1979 at several depths from 30 to 300 meters. A small, inexpensive recording system was designed and manufactured having a noise floor below 0.001 nTin the frequency range of interest. Data analysis includes an ocean wave/geomagnetic fluctuation comparison along with a qualitative analysis of the power spectra of the fourteen hours of geomagnetic fluctuation data. Typical geomagnetic fluctuation spectrum levels were found to be about 1 (nT)-sq/Hz at .01 Hz. As the frequency increased, the magnitude of the spectrum decreased to approximately 0.00001 (nT)-sq/Hz at 3 Hz. Correlation between ocean wave period and peaks in the geomagnetic fluctuation spectra was observed. (Author).
Download or read book Low Frequency Geomagnetic Fluctuations 0 025 to 20 Hz on the Floor of Monterey Bay written by Morgan P. Ames and published by . This book was released on 1981 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Frequency Geomagnetic Fluctuations 04 to 25 Hz on Land and on the Floor of Monterey Bay written by Gerald R. McDevitt and published by . This book was released on 1980 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coil antenna consisting of approximately 6000 turns of copper wire was used to measure the horizontal component of fluctuations of the earth's magnetic field on the floor of Monterey Bay in water depth of approximately 50 meters. The results indicate that the power spectral density of the fluctuations varies from 10(nT)-sq/Hz at 0.04 Hz to 0.000001(nT)-sq/Hz at 25 Hz, a monotonic decrease of about 6 dB/octave, except in the 8-20 Hz region where the Schuman resonances occur. While the sensitivity of the equipment was insufficient to measure the vertical component of the fluctuation we can put an upper limit of 0.001(nT)-sq/Hz at 1 Hz and 0.000001(nT)-sq/Hz) at 10 Hz on the magnitude of this component. The same sensor was also used to measure various components of the field fluctuations at a remote land site (Chew's Ridge). In the frequency range observed the general shape of the spectra was similar to those obtained at sea. However, a strong azimuthal variation at certain frequencies was noted in the land data. The possibility that these directional signals are of man made origin cannot be excluded at this time. (Author).
Download or read book Low Frequency Geomagnetic Fluctuations 04 to 25 Hz on Land and on the Floor of Monterey Bay Gerald R McDevitt and B Bert Homan written by Gerald R. McDevitt and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer. This book was released on 1982-02-01 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing. house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 25 (thesis year 1980) a total of 10,308 theses titles from 27 Canadian and 214 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 25 reports theses submitted in 1980, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1981-03 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1982 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics of Geomagnetic Power Spectra on Land and Sea in the Period Range 0 2 to 400 Seconds written by Gary M. McKinley and published by . This book was released on 1980 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomagnetic field fluctuations in the 0.025-5Hz range were measured with a Cesium vapor magnetometer on the sea floor in Monterey Bay, and at a remote land site. Correlation was found between the geomagnetic activity A-index and both the slope and relative magnitude of the power spectra. More active days showed a greater fall-off as frequency increased, and a higher level of the observed power spectra. Fluctuations averaging 0.1n (sq T)/Hz were noted at the low frequencies, dropping to 0.00001n (sq T)/Hz at 1 Hz. Comparisons were made between the land/sea and day/night data to determine the sea and diurnal effects. In addition to swell induced fluctuations, the overall power spectra for sea data is 10-15 dB higher than land data. Diurnal shifts indicate a 20 second period increase in the nighttime Pc 3 fluctuations. Daytime intensity is generally 5 dB above the nighttime data, but with a crossover at 0.05Hz, the nighttime data then running 3 to 5 dB above the day. Further observations were made to determine the applicability of the magnetometer for non-seismic detection of nuclear blast. (Author).
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1982 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysics Tectonics Abstracts written by and published by . This book was released on 1987 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ambient Noise in the Sea written by Robert J. Urick and published by . This book was released on 1984 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fifth International Conference on HF Radio Systems and Techniques 22 25 July 1991 written by and published by . This book was released on 1991 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
