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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ISPRS-Annals</journal-id>
<journal-title-group>
<journal-title>ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences</journal-title>
<abbrev-journal-title abbrev-type="publisher">ISPRS-Annals</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2194-9050</issn>
<publisher><publisher-name>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/isprs-annals-XI-3-2026-989-2026</article-id>
<title-group>
<article-title>Validation of global land-ocean aerosol products retrieved from the DPC-2/GF-5(02) on-orbit measurements</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Zhang</surname>
<given-names>Zihan</given-names>
<ext-link>https://orcid.org/0000-0003-2544-4487</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Li</surname>
<given-names>Zhengqiang</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>State Key Laboratory of Spatial Datum, College of Remote Sensing and Geoinformatics Engineering, Faculty of Geographical Science and Engineering, Henan University, Zhengzhou 450046, China</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>University of Chinese Academy of Sciences, Beijing 100049, China</addr-line>
</aff>
<pub-date pub-type="epub">
<day>09</day>
<month>07</month>
<year>2026</year>
</pub-date>
<volume>XI-3-2026</volume>
<fpage>989</fpage>
<lpage>994</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Zihan Zhang</copyright-statement>
<copyright-year>2026</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://isprs-annals.copernicus.org/articles/XI-3-2026/989/2026/isprs-annals-XI-3-2026-989-2026.html">This article is available from https://isprs-annals.copernicus.org/articles/XI-3-2026/989/2026/isprs-annals-XI-3-2026-989-2026.html</self-uri>
<self-uri xlink:href="https://isprs-annals.copernicus.org/articles/XI-3-2026/989/2026/isprs-annals-XI-3-2026-989-2026.pdf">The full text article is available as a PDF file from https://isprs-annals.copernicus.org/articles/XI-3-2026/989/2026/isprs-annals-XI-3-2026-989-2026.pdf</self-uri>
<abstract>
<p>The Chinese second-generation Directional Polarization Camera (DPC-2) onboard the GF-5(02) satellite provides global multi-angle, multispectral polarization observations, effectively bridging the gap between POLDER/PARASOL and SPEXone/PACE. Using one year of DPC-2/GF-5(02) measurements, land-ocean aerosol products are generated by fully exploiting polarization and angular information to enhance sensitivity to aerosol properties. Ground-based observations from the AErosol RObotic NETwork (AERONET) are used to evaluate the retrieval accuracy of Aerosol Optical Depth at 550 nm (AOD&lt;sub&gt;550&lt;/sub&gt;), &amp;Aring;ngstr&amp;ouml;m Exponent between 440 nm and 670 nm (AE&lt;sub&gt;440-670&lt;/sub&gt;), and Single Scattering Albedo at 440 nm (SSA&lt;sub&gt;440&lt;/sub&gt;), demonstrating the stability and reliability of the retrievals. For AOD&lt;sub&gt;550&lt;/sub&gt;, the Root Mean Square Error (RMSE) and bias are 0.109 and &amp;minus;0.006 over land, and 0.071 and &amp;minus;0.001 over ocean. For AE&lt;sub&gt;440-670&lt;/sub&gt;, the RMSE and bias are 0.488 and &amp;minus;0.151 over land, and 0.275 and &amp;minus;0.047 over ocean. For SSA&lt;sub&gt;440&lt;/sub&gt;, the RMSE and bias are 0.044 and 0.003 over land, and 0.039 and 0.002 over ocean. Comparisons with mainstream satellite aerosol products indicate comparable and consistent accuracy. Overall, these results provide a coherent global characterization of aerosol distribution and properties, highlighting the strong potential of DPC-2/GF-5(02) for long-term aerosol monitoring and climate research.</p>
</abstract>
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