Delta-X: UAVSAR L2 Interferometric Products, MRD, Louisiana, 2021

This dataset contains georeferenced UAVSAR Level 2 (L2) interferometric products for Delta-X flight lines acquired during the spring (2021-03-27 to 2021-04-18) and fall (2021-09-03 to 2021-09-13) deployments. This dataset provides water-level change observations throughout wetlands of the Atchafalaya and Terrebonne Basins, in Southern Louisiana, USA, within the Mississippi River Delta (MRD), and it may be used to generate time series analysis. The data were collected by Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), a polarimetric L-band synthetic aperture radar flown on the NASA Gulfstream-III (C20) aircraft as part of the Delta-X campaign. Water surface elevations were measured on multiple flights at 30-minute intervals. Data quality was assessed by comparing water elevation estimates with data from in situ water level gauges throughout the study area. The data include interferogram phase, interferogram amplitude, unwrapped interferogram phase, and coherence products. A series of quality assurance masks of troposphere-induced phase delay regions were generated for all SAR acquisition dates using a weather feature matching algorithm. Geometry files for each flight line per field campaign with latitude, longitude, height and incidence angle information are also included. The data are provided in ENVI format.

本数据集包含春（2021年3月27日至2021年4月18日）和秋（2021年9月3日至2021年9月13日）部署期间获取的Delta-X飞行线地理参照UAVSAR Level 2（L2）干涉测量产品。该数据集提供了美国南部路易斯安那州阿切法拉亚河和特雷博恩盆地湿地水域变化观测数据，位于密西西比河三角洲（MRD）范围内，可用于生成时间序列分析。数据由无人驾驶航空器合成孔径雷达（UAVSAR）收集，该雷达为极化L波段合成孔径雷达，搭载于NASA的Gulfstream-III（C20）飞机上，作为Delta-X活动的组成部分。水面高程在多次飞行中以30分钟为间隔进行测量。通过对研究区域内实地水位计数据进行比对，对数据质量进行了评估。数据包括干涉图相位、干涉图幅度、展开后的干涉图相位以及相干性产品。使用天气特征匹配算法，为所有SAR获取日期生成了一系列大气相位延迟区域的质量保证掩膜。此外，还包括了每个现场活动中每条飞行线的几何文件，其中包含纬度、经度、高度和入射角信息。数据以ENVI格式提供。