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    <datestamp>2025-04-16 14:31:23</datestamp>
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    <type>data_collection</type>
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      <item>
        <name>
          <family>Harrison</family>
          <given>Roy</given>
        </name>
        <id>R.M.HARRISON@bham.ac.uk</id>
        <orcid>0000-0002-2684-5226</orcid>
      </item>
      <item>
        <name>
          <family>Beddows</family>
          <given>David C.</given>
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        <id>d.c.beddows@bham.ac.uk</id>
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    <title>Research data supporting ”Wide-Positive Matrix Factorisation of Particle Number Size Distributions: A New Approach Accounting for Cyclically Changing Source Profiles”</title>
    <divisions>
      <item>10col_life</item>
    </divisions>
    <keywords>Positive Matrix Factorisation; PMF;  Particle Number Size Distribution PNSD; Mobility Particle Size Spectrometers (MPSS); Long term monitoring station</keywords>
    <abstract>Mobility Particle Size Spectrometer data collected from TROPOS for the years 2010 to 2020.  

Wide-PMF DATA listed below: The row names label the day of the year YYYY-MM-DD and the column names label the size bin and hour of the day BIN_HH.  The out files are similarly labelled

TROPOS_WIDE_PMF_INPUT_MATRIX.csv
TROPOS_WIDE_PMF_OUTPUT_9_F_FACTOR.TXT
TROPOS_WIDE_PMF_OUTPUT_9_G_FACTOR.TXT

Narrow-PMF DATA listed below: The row names label the hour of the year D YYYY-MM-DD HH:MM:SS and the column names label the size bin and hour of the day BIN.  The out files are similarly labelled

TROPOS_NARROW_PMF_INPUT_MATRIX.csv
TROPOS_NARROW_PMF_OUTPUT_4_F_FACTOR.TXT
TROPOS_NARROW_PMF_OUTPUT_4_G_FACTOR.TXT</abstract>
    <date>2025-04-16</date>
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    <data_type>Dataset</data_type>
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      <name>
        <family>Harrison</family>
        <given>Roy</given>
      </name>
      <id>R.M.HARRISON@bham.ac.uk</id>
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