摘要:

The past two years have been a period of considerable activity for the American Geophysical Union. During those two years, the Union participated in the Fifteenth General Assembly of the International Union of Geodesy and Geophysics, developed plans for separating from the National Academy of Sciences, prepared amended Statutes and Bylaws for consideration by the membership, worked with the NAS on the development of a new constitution for the U.S. National Committee for IUGG, and set in motion efforts to develop closer working relationships with the U.S. National Committee for the International Union of Scientific Radio (URSI). Since this activity implies significant changes for AGU and its relations to the NAS, IUGG, and other scientific societies, it seems appropriate to give members a brief accounting.

ISSN:0002-8606    

DOI:10.1029/EO053i006p00643

年代:1972

数据来源: WILEY

摘要:

In late 1969, Battelle Memorial Institute‐Columbus Laboratories (Battelle‐Columbus) was involved in a NASA experiment in the Bahamas, the over‐all objective of which was to determine the feasibility of using C‐band radar for ship positioning and for establishing marine geodetic control points.The use of C‐band radar for marine measurements is desirable for several reasons: (1) C‐band radar can be operated in a ranging mode by measuring distances from ship to satellites and provides a particular advantage in that errors in ship velocity are not as critical as they are with the Doppler satellite technique; (2) several ships already have C‐band radar systems on board; and (3) it provides an additional satellite system for geodetic measur

ISSN:0002-8606    

DOI:10.1029/EO053i006p00644

年代:1972

数据来源: WILEY

摘要:

Approximately 45 scientists gathered at Princeton University on January 24, 1972, for a five‐day meeting to plan scientific studies on the mid‐Atlantic ridge. Geophysicists front the United States and four foreign countries met under the auspices of the Ocean Science Committee of the National Academy of Sciences with the financial support of the National Science Foundation. A Steering Committee including A. Fischer, J. Heirtzler (Chairman), F. Press, and M. Talwani organized panels on pedogenesis, details of tectonic processes, and geophysical structure. Each panel reviewed our present knowledge, identified major unsolved problems, and indicated methods of solut

ISSN:0002-8606    

DOI:10.1029/EO053i006p00650

年代:1972

数据来源: WILEY

摘要:

On February 12, 1947, a tremendous chunk of iron, nickel, and cobalt fell in the foothills of the Sikhote‐Alin range, near Vladivostok in the far eastern region of the USSR. The twenty‐fifth anniversary of this event was marked at an extended meeting of the Meteorite Committee of the USSR Academy of Sciences by many scientists who have been studying all the details of the fall for the past quarter cent

ISSN:0002-8606    

DOI:10.1029/EO053i006p00651-01

年代:1972

数据来源: WILEY

摘要:

The contract for construction of the 100‐inch Irénée du Pont Telescope mounting, including the mirror support system and the precise driving mechanism, has been awarded to the Boiler&Chivens Division of Perkin‐Elmer Corporation, South Pasadena, California, in joint venture with the L and F Industries of Los Angeles. The 67‐ton telescope is to be installed at the Carnegie Institution of Washington's Las Campanas Observatory i

ISSN:0002-8606    

DOI:10.1029/EO053i006p00652-01

年代:1972

数据来源: WILEY

摘要:

Rainfall over Lake Ontario and its basin will be measured more accurately than ever before by a special radar system which, together with a back‐up rain‐gage network, is now in full operation for the International Field Year for the Great Lakes (IFYGL).U.S. radars located at Buffalo and Oswego, New York, will be tied in with a Canadian radar near Toronto (Woodbridge, Ontario) to cover the entire lake watershed. The Buffalo radar is operated by the National Weather Service of NOAA and has been specially instrumented to undertake this project. At the other end of the lake, a new radar has been erected about eight miles south of Oswego, and is operated by State University of New York at Oswego under contract to N

ISSN:0002-8606    

DOI:10.1029/EO053i006p00653-02

年代:1972

数据来源: WILEY

摘要:

Four major U.S. corporations are now working together to investigate the feasibility of large‐scale satellite systems that would harness the abundant energy of the sun for use on earth. Such systems would represent a useful alternative to the energy production methods presently being studied to meet our future needs. An agreement to study the concept was signed today by representatives from the consulting firm of Arthur D. Little, Inc. (program planning), Grumman Aerospace Corporation (systems engineering), Raytheon Company (microwave systems), and Spectrolab Division, Textron, Inc. (solar cell arrays).The four companies have developed a basic concept that envisions a satellite with a large area of solar cells that would convert the sun's radiation into electricity. This energy would be transformed to microwaves and transmitted to earth, where a receiving station would convert the incoming microwaves into dc electricity at a very high efficienc

ISSN:0002-8606    

DOI:10.1029/EO053i006p00654-01

年代:1972

数据来源: WILEY

ISSN:0002-8606    

DOI:10.1029/EO053i006p00655

年代:1972

数据来源: WILEY