[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[],["The Landsat 7 dataset, available from 1999-01-01 to 2021-12-19 via Google Earth Engine, provides 32-day Normalized Difference Snow Index (NDSI) composites. These composites, derived from Tier 1 orthorectified scenes, use top-of-atmosphere reflectance to identify snow based on its reflectance in visible and mid-IR bands. Each composite includes all images from the 32-day period, with the most recent pixel used. The dataset, publicly accessible, has an NDSI band with a 30-meter pixel size, and is provided by the USGS.\n"]]