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