<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>EFFECTS OF FILTER RESPONSE ON ANALYSIS OF AIRCRAFT NOISE DATA</title>
      <link>https://trid.trb.org/View/177466</link>
      <description><![CDATA[This report analyzes the effects of non-ideal filter transmission characteristics upon the measurement, correction, or extrapolation of aircraft noise dat a. The report is based primarily upon, and represents an abbreviated summary of, two previously published, more detailed reports on this topic. The basic approach used to correct aircraft spectra for analysis errors due to finite filter sidebands and signal spectrum slopes involves defining same type of approximation to the true spectrum shape of all frequencies. The closer this approximation is to the true spectrum slope, the more accurate the correction for filter effects. This report reviews several such filter effect correction methods of varying degrees of accuracy. Measurements on the ground of noise from aircraft in flight can involve propagation distances of the order of 300 to 2,000 m or more. In this case, band levels at high frequencies can be substantially in error, by more than 10 dB, unless filter effects are considered. However, it is also shown that while the band levels may be subject to large errors due to filter effects , errors in composite noise levels such as PNL, LA or EPNL will usually be small - less than 1 dB.]]></description>
      <pubDate>Tue, 30 Sep 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/177466</guid>
    </item>
    <item>
      <title>COAXIAL MAGNETRON SPECTRA AND INSTABILITIES</title>
      <link>https://trid.trb.org/View/57677</link>
      <description><![CDATA[Application of advanced radar clutter rejection techniques to FAA airport surveillance and enroute radars is constrained by inherent instabilities and spectral properties of the device used in the radar transmitter to generate high level RF pulse energy, and the degree to which its spectrum can be influenced by the circuit in which it operates. Coaxial magnetrons are believed to be spectrally pure, controllable and stable, and to embody other characteristics such as long life, which make them attractive replacements for the magnetrons presently employed. This report summarizes the results of extensive measurements made on a conventional S-band magnetron (presently employed in the ASR-7 radar) and a coaxial magnetron of equivalent pulse and power rating to compare their instabilities and spectral properties. (Author)]]></description>
      <pubDate>Wed, 30 Jan 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57677</guid>
    </item>
    <item>
      <title>LABORATORY MEASUREMENTS OF VERY HIGH FREQUENCY COMMUNICATION EQUIPMENT FOR DATA LINK</title>
      <link>https://trid.trb.org/View/30241</link>
      <description><![CDATA[Laboratory measurements were made on very high frequency (vhf), commercial airborne transceivers and Federal Aviation Administration (FAA) vhf ground transmitters and receivers. Characteristics of each unit were measured in order to determine suitability for data link application and to provide a data base for subsequent planning of vhf data link flight tests. Results show that Aeronautical Radio, Inc. (ARINC), transceivers are suitable data link devices and with minor modifications most FAA and general aviation transmitters and receivers tested are also suitable at the 2400 and 4800 bit per second rates. (Author)]]></description>
      <pubDate>Wed, 04 Feb 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/30241</guid>
    </item>
  </channel>
</rss>