[[["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"]],[],[],["Landsat 4 MSS Collection 2 data is categorized into Tier 1 and Tier 2. Tier 1 scenes contain the highest quality data suitable for time-series analysis, specifically Level-1 Precision Terrain (L1TP) processed data. Tier 2 includes scenes that do not meet Tier 1 criteria, such as Systematic terrain (L1GT) and Systematic (L1GS) processed scenes. Both tiers contain DN values representing scaled, calibrated at-sensor radiance and are globally available.\n"]]
