mex-ima-param
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<h2>IMA Ion Moments</h2>
IMA ion moments are calculated in IRAP using Andrei Fedorov procedure.
<br/><b>Caveats</b>
<ul>
<li> Measurements before May 2007 starts from Energy = 300 eV.
<li>IMA/MEX operates in two modes -16 / 2 elevation angles (averaged). In <i>2 elevations</i> mode the quailty flag value is undefined (== 0).
Density quality flag values :
<ul>
<li> 0.0 : Undefined (2 elevation angles mode)
<li> 0.0 - 0.6 : Poor
<li> 0.6 - 0.8 : Acceptable
<li> 0.8 - 0.9 : Good
<li> 0.9 - 1.0 : Excellent
</ul>
MEX IMA protons and heavy ions number density could be considered reliable only in the case when corresponding quality flag
(<b><i>moments_quality_factor</i></b>) is greater than 0.6 and density values themselves are greater than 0.01 cm-3<br/>
It is highly recommended to download quality flag along with IMA ion densities.
<li>Due to instrument limitations IMA/MEX measures protons with the energies higher than 1 keV. If possible
the proton parameters are reconsructed from the <a target='new' href="help/auto/img/mex_ima.png">ghost' distrubution function.</a>
</ul>
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