摘要:

A gamma ray and neutron spectrometer instrument built at the University of New Hampshire under direction of Edward L. Chupp has detected several important new kinds of emissions from solar flares. The instrument was launched Feb. 14, 1980 on the Solar Maximum Mission satellite. Chupp reports that during a major flare on June 21, 1980, his experiment made the first clear observations of neutrons reaching the earth from a solar flare.Neutrons are neutral subatomic particles created in nuclear reactions with flares. Free neutrons decay spontaneously into protons and electrons in about 15 minutes, so only very high speed neutrons can reach the earth at all, as light takes about 8 minutes to reach the earth from the sun. In the June 21 flare an intense burst of gamma rays, lasting about 1 minute, was followed by a 20‐min stream of neutrons. This particular flare was probably the most intense to occur during this solar cycl

ISSN:0002-8606    

DOI:10.1029/EO062i048p01161-01

年代:1981

数据来源: WILEY

摘要:

Excellent job opportunities exist for well‐trained Ph.D. graduates in marine geology, geophysics, chemistry, dynamical‐physical oceanography, and oceanographic engineering.This was one conclusion the deans of various schools of oceanography reached at a conference that included deans from Dalhousie University, Florida State University, the University of Hawaii, the University of Miami, Oregon State University, the University of Rhode Island, Scripps Institution of Oceanography, Texas A&M University, the University of Washington, and the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program in Oceanography. The results of this effort, combined with some of our own notions, form the basis of this short report. We hope that these thoughts will serve as a discussion base for more in‐depth reflec

ISSN:0002-8606    

DOI:10.1029/EO062i048p01162-01

年代:1981

数据来源: WILEY

摘要:

‘I want the journal to acquire a reputation for very rapid, fair, and accurate reviewing,’ asserted John F. Dewey, editor‐in‐chief of AGU's newest journal,Tectonics. Dewey said that he will rule the bimonthly, which will begin publication in February, ‘with a bit of a rod of iron’ to ensure thatTectonicsis ‘where only original and important papers are published.’‘I'm going to be very strict with reviewers,’ Dewey explained in his quick British clip. ‘If the review does not come back to me within 10 days to 2 weeks, I'll review the paper myself. I'm also going to have a system whereby, if a paper needs major surgery after being refereed, it will be rejected. Papers will have to be in virtually publishable condition before they are firs

ISSN:0002-8606    

DOI:10.1029/EO062i048p01163

年代:1981

数据来源: WILEY

摘要:

The program for this year's aerospace meeting of The Institute of Navigation addressed developments in the evolving Global Positioning System (GPS) of navigation satellites, inertial navigation systems, and other electronic navigation systems and their applications. Also included in the program were a limited number of papers addressing the geodetic use of the GPS system.The Global Positioning System is a constellation of 18 navigation satellites being developed by the Department of Defense to provide instantaneous worldwide navigation. The system will support a multitude of military applications. The first paper by Jacobson reviewed the engineering development of GPS navigation receivers stressing the use of common hardware and software modules. A later paper by Ould described the mechanization of a digital receiver for GPS applications designed for faster acquisition of the spread spectrum satellite transmissions than analog receivers. The paper by Brady discussed the worldwide coverage that is provided by the limited number of satellites that will constitute the GPS constellation through 1983. The capability provided by the satellites presently on orbit would support a variety of experiments at almost any location. Tables of multiple satellite availability are provided for numerous worldwide locations. For civil aviation applications, Vogel addressed the satellite geometry considerations for low cost GPS user equipment, Esposito described the Federal Aviation Administration acceptance tests of a GPS navigation receiver, and Hopkins discussed the design and capability of an integrated GPS strapdown attitude and heading reference system for avionics.

ISSN:0002-8606    

DOI:10.1029/EO062i048p01166

年代:1981

数据来源: WILEY