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<a HREF="index.html"> <IMG SRC="rsl.gif"> </a>
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<h1>RSL_get_volume</h1>

<hr>

<h3>Synopsis</h3>
<b>#include &quot;rsl.h&quot;</b> <br>
<b><a href=RSL_volume_struct.html>Volume</a> *RSL_get_volume(<a href=RSL_radar_struct.html><a href=RSL_radar_struct.html>Radar</a></a> *r, int type_wanted);</b>

<h3>
<hr>Description</h3>
<b>RSL_get_volume</b> extracts the desired volume from the <b>Radar</b> *<b>r</b>. <b>type_wanted</b> can be one of: DZ_INDEX, VR_INDEX, SW_INDEX, CZ_INDEX, ZT_INDEX, DR_INDEX or LR_INDEX. Only the pointer is copied for the returned value. If you want to optain a seperate copy of the volume, from the Radar *r, for modification purposes, then use <a href=RSL_copy.html>RSL_copy_volume</a>. The different indexes are described as follows:

<pre> DZ	Reflectivity (dBZ), may contain some	DZ_INDEX
 	signal-processor level QC and/or
 	filters. This field would contain
 	Darwin's CZ, or WSR88D's standard
 	reflectivity. In other words, unless
 	the field is described otherwise, it
 	should always go here. In essence, this
 	is the &quot;cleanest&quot; reflectivity field
 	for a radar.

 VR 	Radial Velocity (m/s)		VR_INDEX

 SW 	Spectral Width (m2/s2) 		SW_INDEX

 CZ 	QC Reflectivity (dBZ), contains
	post-processed QC'd data 		CZ_INDEX

 ZT 	Total Reflectivity (dBZ) 		ZT_INDEX
 	May be uncommon, but important

 DR	Differential reflectivity 		DR_INDEX
 	DR and LR are for dual-polarization
 	radars only. Unitless or in dB.

 LR 	Another form of differential ref	LR_INDEX
 	called LDR, not sure of units 

</pre>This function is a one line C function. Observe the following:

<pre>Radar *radar;
Volume *v;
/* The following two lines are identical. */
v = Vget_volume(radar, DZ_INDEX);
v = radar-&gt;v[DZ_INDEX];
</pre>
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<h3>Return value</h3>
Upon successful completion, a pointer to the Volume structure is returned; only the pointer is copyied.
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<h3>See also</h3>
<a href=RSL_get_sweep.html>RSL_get_sweep</a>, <a href=RSL_get_ray.html>RSL_get_ray</a><br>
<a href=RSL_copy.html>RSL_copy_volume</a>, <a href=RSL_copy.html>RSL_copy_sweep</a>, <a href=RSL_copy.html>RSL_copy_ray</a><br>
<a href=RSL_free.html>RSL_free_volume</a>, <a href=RSL_free.html>RSL_free_sweep</a>, <a href=RSL_free.html>RSL_free_ray</a> 
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<p>Author: <a href=john.merritt.html>John H. Merritt</a> 
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