📄 gsnoise.htm
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FDC help: GSnoise
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<h2>
The radio-navigation subsystem <i>GSnoise</i>
</h2>
<p>The sublibrary <i>ILS</i> of the library <i><a href=
"navlib.htm">NAVLIB</a></i> contains two different masked subsystem blocks
which implement glideslope noise signals: <i>GSnoise1</i> and
<i>GSnoise2</i>. See the <a href="#References">references</a> below for
more details about the theoretical backgrounds.</p>
<p>Other blocks in the <i>ILS</i> sublibrary of <i>NAVLIB</i> are: <i><a
href="ils.htm">Nominal ILS signals</a></i>, <i><a href=
"gserr.htm">GSerr</a></i>, <i><a href="locerr.htm">LOCerr</a></i>, and
<i><a href="locnoise.htm">LOCnoise</a></i>, and the example system <i><a
href="ilsxmpl.htm">ILS example</a></i>. </p>
<h3>
<i>GSnoise1</i>
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This block generates glideslope noise according to <a href="#References">AGARD R-632</a>, assuming a constant approach speed. The user
must specify the scale length <i>L<sub>gs</sub></i> (typically 85
<i>m</i>), the standard deviation <i>sigma_gs</i> (usually <= 15
micro-Ampere), and the approach speed <i>V</i>. <br>
<br>
<i>GSnoise1</i> doesn't have any inputs.<br>
Outputsignal: Glideslope-noise [micro-Ampere]
<h3>
<i>GSnoise2</i>
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This block uses a glideslope noise filter according to <a href="#References">NASA CR-2022</a>. The user doesn't have to specify any
parameters. <br>
<br>
<i>GSnoise2</i> doesn't have any inputs.<br>
Outputsignal: Glideslope-noise [micro-Ampere]
<h3>
<a name="References">References</a>
</h3>
<p>Apart from the FDC user-manual, the following references contain more information about the ILS signals:</p>
<ol>
<li>
M.O. Rauw: <i>A Simulink environment for Flight Dynamics and Control
analysis - Application to the DHC-2 'Beaver'</i>, part I:
<i>Implementation of a model library in Simulink</i>. Delft University
of Technology, September 1993
</li>
<li>
Anon.: <i>Approach and Landing Simulation</i>. AGARD report 632, Ames,
1975
</li>
<li>
Johnson, W.A., McRuer, D.T.: <i>Development of a Category II Approach
System Model</i>. NASA Contractor Report 2022, Washington D.C., USA,
1972
</li>
</ol>
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