STAR NDSI collection: A cloud-free MODIS NDSI dataset (2001–2020) for China

<p><strong>If you used our dataset, please cite our reference:</strong></p> <p><strong>Jing, Y., Li, X., and Shen, H.: STAR NDSI collection: a cloud-free MODIS NDSI dataset (2001&ndash;2020) </strong></p> <p><strong>for China, Earth Syst. Sci. Data, 14, 3137&ndash;3156, https://doi.org/10.5194/essd-14-3137-2022, 2022.</strong></p> <p>1. A&nbsp;recent&nbsp;20-year&nbsp;cloud-free&nbsp;MODIS&nbsp;normalized&nbsp;difference&nbsp;snow&nbsp;index&nbsp;(NDSI)&nbsp;collection&nbsp;for&nbsp;</p> <p>China&nbsp;(excluding sea area) is&nbsp;generated&nbsp;using&nbsp;a&nbsp;Spatio-Temporal&nbsp;Adaptive&nbsp;fusion&nbsp;method&nbsp;with&nbsp;</p> <p>erroR&nbsp;correction&nbsp;(STAR).</p> <p>2. The&nbsp;STAR&nbsp;NDSI&nbsp;collection&nbsp;is&nbsp;derived&nbsp;from&nbsp;daily&nbsp;1-km&nbsp;MODIS&nbsp;NDSI&nbsp;datasets&nbsp;(MOD10A1&nbsp;and&nbsp;</p> <p>MYD10A1).</p> <p>3. It&nbsp;is&nbsp;provided&nbsp;using&nbsp;a&nbsp;WGS_1984_UTM_48N&nbsp;projection,&nbsp;with&nbsp;the&nbsp;data&nbsp;format&nbsp;of&nbsp;TIFF&nbsp;images.</p> <p>4. Each&nbsp;ZIP&nbsp;contains&nbsp;NDSI&nbsp;data&nbsp;for&nbsp;one&nbsp;hydrological&nbsp;year&nbsp;(August&nbsp;to&nbsp;next&nbsp;July).&nbsp;After&nbsp;</p> <p>uncompressing&nbsp;into&nbsp;the&nbsp;TIFF&nbsp;format,&nbsp;the&nbsp;files&nbsp;are&nbsp;named&nbsp;as &quot;NDSI_&nbsp;yyyymmdd_Daily_500M_</p> <p>V01.tif&quot;&nbsp;for&nbsp;NDSI&nbsp;data&nbsp;and&nbsp;&quot;QA_yyyymmdd_Daily_500M_V01.tif&quot;&nbsp;for&nbsp;quality&nbsp;assessment&nbsp;(QA)&nbsp;data.&nbsp;</p> <p>5. The&nbsp;accuracy&nbsp;of&nbsp;this&nbsp;collection&nbsp;has&nbsp;been&nbsp;well&nbsp;validated&nbsp;by&nbsp;the&nbsp;in-situ&nbsp;snow&nbsp;depth&nbsp;observations&nbsp;</p> <p>and&nbsp;Landsat&nbsp;OLI&nbsp;NDSI&nbsp;maps.&nbsp;The&nbsp;detailed&nbsp;information&nbsp;can&nbsp;be&nbsp;found&nbsp;in&nbsp;the&nbsp;published&nbsp;paper.</p> <p>6. The&nbsp;NDSI&nbsp;value&nbsp;ranges&nbsp;from&nbsp;0,&nbsp;1-100.&nbsp;The&nbsp;value&nbsp;of&nbsp;water&nbsp;is&nbsp;set&nbsp;to&nbsp;255.&nbsp;The&nbsp;fill&nbsp;value&nbsp;is&nbsp;set&nbsp;to&nbsp;127.</p> <p>7.&nbsp;Disclaimer: The spatial scope of the dataset is for research convenience.&nbsp;Please refer to official</p> <p>release for a standard map of China,&nbsp;http://211.159.149.56/index.html.</p> <p>8. The new version&nbsp;includes data from 2001 to 2020, while the old version includes data from</p> <p>2012 to 2020 (https://doi.org/10.5281/zenodo.5644386).</p> <p>9.&nbsp;In case any questions arise, please do not hesitate to contact us (yhjing@whu.edu.cn).</p>