MASTER: Western Diversity Time Series Campaign, WDTS, Spring 2024

This dataset includes Level 1B (L1B) data products from the MODIS/ASTER Airborne Simulator (MASTER) instrument. The spectral data were collected as part of the Western Diversity Time Series (WDTS, formerly HyspIRI) airborne campaign during four flights aboard a NASA ER-2 aircraft over California and Nevada, U.S., from 2024-06-04 to 2024-06-28. The WDTS campaign will observe California's ecosystems and provide critical information on natural disasters such as volcanoes, wildfires, and drought. MASTER products can identify vegetation type and health and provide a benchmark for the state of the ecosystems against which future changes can be assessed. Data products include L1B georeferenced multispectral imagery of calibrated radiance in 50 bands covering wavelengths of 0.460 to 12.879 micrometers at approximately 50-meter spatial resolution. Derived L2 data products are emissivity in five bands in thermal infrared range (8.58 to 12.13 micrometers) and land surface temperature. The L1B file format is HDF-4, and L2 products are provided in ENVI and KMZ formats. In addition, the dataset includes the flight path, spectral band information, instrument configuration, ancillary notes, and summary information for each flight, and browse images derived from each L1B data file.

本数据集包含MODIS/ASTER机载模拟器（MODIS/ASTER Airborne Simulator, MASTER）的1B级（Level 1B, L1B）数据产品。该光谱数据作为西部多样性时间序列（Western Diversity Time Series, WDTS，前身为HyspIRI）机载观测任务的一部分被采集，于2024年6月4日至2024年6月28日期间，由搭载于NASA ER-2飞机的平台在美国加利福尼亚州与内华达州上空完成四次飞行任务获取。WDTS任务旨在对加利福尼亚州的生态系统开展观测，并为火山、野火、干旱等自然灾害提供关键支撑数据。MASTER数据产品可识别植被类型与健康状况，同时可为生态系统现状提供基准参照，用于后续生态变化的评估。本数据集的数据产品包括：覆盖0.460至12.879微米波长范围、共50个波段的定标辐射亮度地理参考多光谱影像，空间分辨率约为50米。衍生的L2级数据产品包括热红外波段（8.58至12.13微米）内5个波段的发射率数据，以及地表温度数据。L1B数据文件格式为HDF-4，L2级产品以ENVI和KMZ格式提供。此外，本数据集还包含每次飞行的飞行路径、光谱波段信息、仪器配置、辅助说明文档与汇总信息，以及从每份L1B数据文件生成的浏览影像。