Circular 5. U.S.A. Omni Range Improvements

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Circular 5

U.S.A. Omni Range Improvements

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CIRCULAR U.S.A. OMNl RANGE IMPROVEMENTS .Published by authority of the Secretary General INTERNATIONAL CIVIL AVIATION ORGANIZATION MONTREAL CANADA

'Shis lbblicatiion is issued in English, French and SpanEsh. e - T.nternatiorP Civil viition Ormi zation. Corespondenee concerning the publications should be addressed to the Secretary General of ICAO, Dominion Square Building, Montreal, Canada. Orders for ICAO publlcntions should be sent, on payment In Canadian or U .S. currency m, to In SterXng, or Irish currency s/dl, to Secsehry General, ICAO, His FZa jesty 9s Stationery Office, Domhion Square Building, 4.29 Word Street, Montreal, Canada London W .I, cable address ICAO b10XEtEU d, In fiench cmencs Ere, o Iri EW currency hhsl, to ICAO Representative, European African Office, 60 bis Avenue d tItnab Paris 16e, France cable ndes s ICAOREP PARIS ICAQ Representative, Kiddle East Office, 10 Sharia Lotfallah, Apartment 7, Zamalek , In Permian currency soles, to In Australian cwencs s/d, to ICAO Representative, ICAO Representative , South American Office, Far East, Pacific OffLee, Apado 680, 522 Little Collins SLreet, Lima, Peru.' 14elbourne, Australia. Cable address3 ICAOREP LIMB cable address r ICBW MELBOURNE Prfeeo 10 cents Canadian or U43. currency Montreal

ICAO Circular 5 . i.W4 Page 3 TABLE OF CQNIXTS FOREWORD OOeoOooBOOUDOODOODDoeeeoeooo ............ INTRODUCTION ...e......e..o.........w...e Reduction of Errors Caused by House .................. Recent 14easurements of Station Error ................. Black Moshannon Station Error. ....................... Reduction of Polarization Errors ..................... Stability of Omni Range ...........O..O. The Goniometer and Tone Wheel ..............O......... Spinning Antenna Development.o.oo.ooO.O.eO ...O...... Method of Setting Up and Monitoring Omni Ranges ...... Laboratory Test Facilities for VHF Omni Range Receiving Equipment . oooeeeOOoOeeeoeeOoOoe Improvement of Aircraft Receiving Antenna... .......O. Course Line Computers Using Information from Omni Range and DEB eooooeoeoOeeOOoOeDeDOee o.ooe VOR Flight Tests and Laboratory Measurements ......... Existing Problems of Omni Range ......O. Status of CAA Omnf Range Programmeooo,,,oo,eO.OoBOo.e Page 5

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