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terraref/extractors-hyperspectral: Nov 2017 Beta Release

JeromeMao; Max Burnette; hmb1; Charlie Zender; David LeBauer


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  <identifier identifierType="DOI">10.5281/zenodo.1157123</identifier>
  <creators>
    <creator>
      <creatorName>JeromeMao</creatorName>
      <affiliation>University of California, Irvine</affiliation>
    </creator>
    <creator>
      <creatorName>Max Burnette</creatorName>
      <affiliation>NCSA</affiliation>
    </creator>
    <creator>
      <creatorName>hmb1</creatorName>
      <affiliation></affiliation>
    </creator>
    <creator>
      <creatorName>Charlie Zender</creatorName>
      <affiliation>University of California, Irvine</affiliation>
    </creator>
    <creator>
      <creatorName>David LeBauer</creatorName>
      <affiliation>University of Illinois</affiliation>
    </creator>
  </creators>
  <titles>
    <title>terraref/extractors-hyperspectral: Nov 2017 Beta Release</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2018</publicationYear>
  <dates>
    <date dateType="Issued">2018-01-22</date>
  </dates>
  <resourceType resourceTypeGeneral="Software"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/1157123</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsSupplementTo">https://github.com/terraref/extractors-hyperspectral/tree/v1.0</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.1157122</relatedIdentifier>
  </relatedIdentifiers>
  <version>v1.0</version>
  <rightsList>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;This is the first release of the hyperspectral pipeline. See the repository README for more details. It represents a major improvement relative to the Nov 2016 release.&lt;/p&gt;
&lt;p&gt;The hyperspectral calibration procedure is documented at &lt;a href="https://github.com/terraref/computing-pipeline/issues/282"&gt;https://github.com/terraref/computing-pipeline/issues/282&lt;/a&gt;.&lt;/p&gt;
Limitations
&lt;ol&gt;
&lt;li&gt;Only valid for 300-800nm (range of downwelling radiometer)&lt;/li&gt;
&lt;li&gt;Raw hyperspectral exposures are calibrated for images in full sunlight. Other times and cloudy days are not well-tested yet. &lt;/li&gt;
&lt;li&gt;Zenith angles used in the calibration data are: 42.3, 47.6, 53.0, 58.4, 64.0, 75.1, 80.7, 86.5&lt;ul&gt;
&lt;li&gt;The closer the raw data is to these angles the better the result  &lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;The calibration needs improvement to obtain accurate absolute reflectances. Environmental conditions (such as shade and specular reflection) and irregular calibration of known targets (such as tilted surfaces and field-based calibration) can bias retrieved reflectances by an unknown factor. However, the scale bias factors out of indices created as ratios of reflectances, e.g., (A-B) / (A+B).&lt;/li&gt;
&lt;/ol&gt;
Related GitHub issues and documentation
&lt;ol&gt;
&lt;li&gt;&lt;a href="https://docs.google.com/document/d/e/2PACX-1vRKArTMn0aU90KoFKe-HCYMuFubcW_WLUZsFCWCT2rENhitzf00tLktYm6EG2DIB3X5rSRD1A1DOZhL/pub"&gt;Notes from meeting on calibration options&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;First (alpha) calibration proceedure &lt;a href="https://github.com/terraref/computing-pipeline/issues/88"&gt;https://github.com/terraref/computing-pipeline/issues/88&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Second (radiometer based) calibration &lt;ul&gt;
&lt;li&gt;List of tasks &lt;a href="https://github.com/terraref/computing-pipeline/issues/281"&gt;https://github.com/terraref/computing-pipeline/issues/281&lt;/a&gt; &lt;/li&gt;
&lt;li&gt;Algorithm documentation &lt;a href="https://github.com/terraref/computing-pipeline/issues/282"&gt;https://github.com/terraref/computing-pipeline/issues/282&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ol&gt;</description>
  </descriptions>
</resource>
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