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pydowncontfilterma.html
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pydowncontfilterma.html
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<h1 id="downcontfilterma">DownContFilterMA</h1>
<p>Compute the minimum-amplitude downward continuation filter of Wieczorek and Phillips (1998).</p>
<h1 id="usage">Usage</h1>
<p><code>wl</code> = pyshtools.DownContFilterMa (<code>l</code>, <code>half</code>, <code>r</code>, <code>d</code>)</p>
<h1 id="returns">Returns</h1>
<dl>
<dt><code>wl</code> : float</dt>
<dd>The amplitude of the downward continuation filter.
</dd>
</dl>
<h1 id="parameters">Parameters</h1>
<dl>
<dt><code>l</code> : integer</dt>
<dd>The spherical harmonic degree.
</dd>
<dt><code>half</code> : integer</dt>
<dd>The spherical harmonic degree where the filter is equal to 0.5.
</dd>
<dt><code>r</code> : float</dt>
<dd>The reference radius of the gravitational field.
</dd>
<dt><code>d</code> : float</dt>
<dd>The radius of the surface to downward continue to.
</dd>
</dl>
<h1 id="description">Description</h1>
<p><code>DownContFilterMA</code> will calculate the downward continuation filter of Wieczorek and Phillips (1998; eq. 19) for a given spherical harmonic degree <code>l</code>. The input parameters include <code>half</code>, which is the degree where the filter is equal to 0.5, and <code>r</code> and <code>d</code>, which are the reference radius of the gravitational field and the radius of the surface to downward continue to, respectively.</p>
<h1 id="references">References</h1>
<p>Wieczorek, M. A. and R. J. Phillips, Potential anomalies on a sphere: applications to the thickness of the lunar crust, J. Geophys. Res., 103, 1715-1724, 1998.</p>
<h1 id="see-also">See also</h1>
<p><a href="pydowncontfiltermc.html">downcontfiltermc</a>, <a href="pybatohilmdh.html">batohilmdh</a> <a href="pybatohilmrhohdh.html">batohilmrhohdh</a></p>
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