Tools

LEADER 02728nam a2200445 i 4500

001 ocm03696789;

003 OCoLC;

005 20221222133808.0;

008 780308s1971 dcua b f000 0 eng d;

019 a| 897971274;

049 a| ERE#;

074 a| 0249-A;

086 0 a| C 13.46:610;

100 1 a| Hamilton, W. F.=| ^A604288;

245 10 a| Application of VLF theory to time dissemination /c| W.F. Hamilton and J.L. Jespersen.;

264 1 a| Washington :b| U.S. National Bureau of Standards,c| 1971.;

300 a| v, 166 pages :b| illustrations, graphs, tables ;c| 27 cm;

336 a| textb| txt2| rdacontent;

337 a| unmediatedb| n2| rdamedia;

338 a| volumeb| nc2| rdacarrier;

490 1 a| NBS technical note ;v| 610;

500 a| Nov. 1971.;

504 a| Includes bibliographical references (pages 22-23).;

505 0 a| Introduction -- Time dissemination systems -- Path delay -- Important parameters for VLF calculations -- Theory of calculations -- The calculations -- Discussion and conclusions -- Appendix. Simplified mathematics of the theory.;

520 a| The characteristics of time dissemination systems are discussed, with particular emphasis on the advantages and problems of very low frequency (VLF) timing systems. The parameters affecting VLF propagation along with causes of variations in these parameters are discussed. Three methods of computing VLF propagation delays-- mode theory, geometric-optics, and zonal harmonics--are compared. The method of zonal harmonics, used for calculations in this paper, are discussed in more detail. A method of calculating reflection coefficients for a continuously varying ionosphere is described. The theoretical values are compared with experimental measurements. Graphical results of the calculations are included.;

536 a| Final report prepared for National Aeronautics and Space Administrationb| 51740A-G.;

500 a| GPO Historic Shelflist Project- publication not in hand.;

500 a| GPO Cataloging Record Distribution Program (CRDP).;

650 0 a| Timex| Systems and standards.=| ^A197329;

650 0 a| VLF emissions.=| ^A603064;

650 7 a| Timex| Systems and standards.2| fast0| (OCoLC)fst01151078;

650 7 a| VLF emissions.2| fast0| (OCoLC)fst01163488;

700 1 a| Jespersen, Jamese| author.=| ^A274710;

710 1 a| United States.b| National Aeronautics and Space Administration.=| ^A5437;

830 0 a| NBS technical note ;v| 610.=| ^A4336;

949 a| C 13.46:610w| sudoch| joyner38;

596 a| 1;

998 a| 1008652;

999 a| C 13.46:610w| SUDOCc| 1i| 30372012776313d| 9/7/2005l| JDOSm| JOYNERr| Ys| Yt| JDOSBKu| 9/7/2005x| BOOKz| JFEDDOCSo| .STAFF. 0;

Application of VLF theory to time dissemination / W.F. Hamilton and J.L. Jespersen.

Author/creator	Hamilton, W. F.
Other author	Jespersen, James author.
Other author	United States. National Aeronautics and Space Administration.
Format	Book
Publication	Washington : U.S. National Bureau of Standards, 1971.
Description	v, 166 pages : illustrations, graphs, tables ; 27 cm
Subjects	Time--Systems and standards. VLF emissions.

Series	NBS technical note ; 610 NBS technical note ; 610. ^A4336
Contents	Introduction -- Time dissemination systems -- Path delay -- Important parameters for VLF calculations -- Theory of calculations -- The calculations -- Discussion and conclusions -- Appendix. Simplified mathematics of the theory.
Abstract	The characteristics of time dissemination systems are discussed, with particular emphasis on the advantages and problems of very low frequency (VLF) timing systems. The parameters affecting VLF propagation along with causes of variations in these parameters are discussed. Three methods of computing VLF propagation delays-- mode theory, geometric-optics, and zonal harmonics--are compared. The method of zonal harmonics, used for calculations in this paper, are discussed in more detail. A method of calculating reflection coefficients for a continuously varying ionosphere is described. The theoretical values are compared with experimental measurements. Graphical results of the calculations are included.
General note	Nov. 1971.
General note	GPO Historic Shelflist Project- publication not in hand.
General note	GPO Cataloging Record Distribution Program (CRDP).
Bibliography note	Includes bibliographical references (pages 22-23).
Funding information	Final report prepared for National Aeronautics and Space Administration 51740A-G.
GPO item number	0249-A
Govt. docs number	C 13.46:610

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Application of VLF theory to time dissemination / W.F. Hamilton and J.L. Jespersen.

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