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Loran-c grid calibration requirements for aircraft non-precision approach

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Description:The Federal Aviation Administration (FAA) Technical Center has conducted tests to measure spatial warpage and temporal instability in the Loran-C hyperbolic navigation grid. Airborne Loran-C calibration requirements identified from the test data are discussed in this report. The test results have been obtained in support of the Federal Radionavigation Plan decision process. Test emphasis is placed on non-precision approach, the flight phase for which FAA Advisory Circular AC-90-45A accuracy requirements are most stringent. Spatial warpage is assessed using Time Difference (TD) data collected at approximately 25 sites within 20 km of each of five airports. It is found that the Loran-C TD bias is the dominant warpage component and that the bias must be calibrated to meet AC-90-45A requirements for certain airports and station triads. An alternative but less accurate method than bias calibration makes use of propagation models based on mixed land/sea signal paths. Temporal instability is assessed using TD data collected over two-to-three week periods at each airport and over an entire year at a fixed-site monitor at London, KY. It is concluded that short-term instability is negligible, but seasonal instability is potentially a problem for certain regions and triads.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Loran-c grid calibration requirements for aircraft non-precision approach. To get started finding Loran-c grid calibration requirements for aircraft non-precision approach, you are right to find our website which has a comprehensive collection of manuals listed.
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Pages: 78

Format: PDF, EPUB & Kindle Edition

Publisher: —

Release: 1982

ISBN: nqo6AQAAMAAJ

Description: The Federal Aviation Administration (FAA) Technical Center has conducted tests to measure spatial warpage and temporal instability in the Loran-C hyperbolic navigation grid. Airborne Loran-C calibration requirements identified from the test data are discussed in this report. The test results have been obtained in support of the Federal Radionavigation Plan decision process. Test emphasis is placed on non-precision approach, the flight phase for which FAA Advisory Circular AC-90-45A accuracy requirements are most stringent. Spatial warpage is assessed using Time Difference (TD) data collected at approximately 25 sites within 20 km of each of five airports. It is found that the Loran-C TD bias is the dominant warpage component and that the bias must be calibrated to meet AC-90-45A requirements for certain airports and station triads. An alternative but less accurate method than bias calibration makes use of propagation models based on mixed land/sea signal paths. Temporal instability is assessed using TD data collected over two-to-three week periods at each airport and over an entire year at a fixed-site monitor at London, KY. It is concluded that short-term instability is negligible, but seasonal instability is potentially a problem for certain regions and triads.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Loran-c grid calibration requirements for aircraft non-precision approach. To get started finding Loran-c grid calibration requirements for aircraft non-precision approach, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Loran-c grid calibration requirements for aircraft non-precision approach

Loran-c grid calibration requirements for aircraft non-precision approach

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