Spatial and Temporal Availability of Cloud-free Optical Observations in the Tropics

These data comprise three layers describing the spatial and temporal distribution of cloud-free optical observations over the tropics. The test datasets shared here are derived from the combination of Landsat and Sentinel-2 satellite data and represent a portion of the full datasets. The test data correspond to year 2020 over Mesoamerica. Spatial data: the Meso2020_validObs contains one band 'valid_obs' indicating the number of cloud-free observations at the pixel level. Temporal data: the maximumWaitDate2020 contains two bands 'max' and 'maxDay' corresponding to the number of maximum consecutive days without data in a year and final date in which the maximum number of consecutive days without data occurred, respectively.本数据集包含三个图层，用以刻画热带区域无云光学观测数据的时空分布特征。本次共享的测试数据集由陆地卫星（Landsat）与哨兵-2号（Sentinel-2）卫星数据融合生成，仅为完整数据集的一部分，对应中美洲（Mesoamerica）2020年度的观测数据。空间数据图层Meso2020_validObs包含一个名为valid_obs的波段，用于表征各像素点处的无云观测总次数。时间数据图层maximumWaitDate2020包含max与maxDay两个波段，分别对应年度内最长连续无数据天数，以及该最长连续无数据时段的最终发生日期。